1.5634 (75Ni8 / ~15N20)

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EASY-TO-HARDEN STEEL
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EASY-TO-POLISH STEEL
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EASY-TO-SHARPEN STEEL
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BEGINNER-FRIENDLY STEEL

Basic parameters:

  • Thickness tolerance: 0/+0,2 mm (the surface is not precision ground)
  • Cutting tolerance: we cut the steel on band saws to a tolerance of 0/+3 mm (width x length)
  • Delivery conditon: steel in non-hardened condition (steel requires hardening)

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2
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30
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250
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7.95 zł
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23 %
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9.78 zł
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165
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2 x 30 x 300
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2
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30
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300
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9.78 zł
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23 %
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12.03 zł
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134
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2 x 30 x 350
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2
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30
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350
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23 %
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13.54 zł
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119
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2 x 30 x 400
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2
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30
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400
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12.85 zł
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23 %
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15.80 zł
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102
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2 x 30 x 500
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2
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30
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500
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23 %
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19.56 zł
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82
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2 x 40 x 250
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2
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40
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250
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10.40 zł
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23 %
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12.79 zł
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126
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2 x 40 x 300
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2
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40
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300
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12.85 zł
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23 %
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15.80 zł
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102
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2 x 40 x 350
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2
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40
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350
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14.67 zł
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23 %
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18.05 zł
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89
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2 x 40 x 400
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2
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40
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400
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16.51 zł
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23 %
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20.31 zł
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79
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2 x 40 x 500
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2
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40
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500
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20.79 zł
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23 %
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25.57 zł
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63
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2 x 50 x 250
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2
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50
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250
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12.85 zł
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23 %
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15.80 zł
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102
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2 x 50 x 300
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2
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50
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300
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15.28 zł
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23 %
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18.80 zł
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86
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2 x 50 x 350
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2
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50
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350
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18.35 zł
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23 %
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22.57 zł
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71
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2 x 50 x 400
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2
Width [mm]
50
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400
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20.79 zł
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23 %
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25.57 zł
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63
Dimension [mm]
2 x 50 x 500
Thickness [mm]
2
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50
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500
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25.68 zł
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23 %
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31.59 zł
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51
Dimension [mm]
2 x 60 x 250
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2
Width [mm]
60
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250
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15.28 zł
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23 %
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18.80 zł
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86
Dimension [mm]
2 x 60 x 300
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2
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60
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300
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18.35 zł
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23 %
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22.57 zł
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71
Dimension [mm]
2 x 60 x 350
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2
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60
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350
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21.41 zł
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23 %
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26.33 zł
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61
Dimension [mm]
2 x 60 x 400
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2
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60
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400
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24.46 zł
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23 %
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30.09 zł
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53
Dimension [mm]
2 x 60 x 500
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2
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60
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500
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30.58 zł
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23 %
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37.61 zł
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43
Dimension [mm]
2 x 70 x 250
Thickness [mm]
2
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70
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250
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17.73 zł
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23 %
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21.81 zł
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74
Dimension [mm]
2 x 70 x 300
Thickness [mm]
2
Width [mm]
70
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300
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21.41 zł
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23 %
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26.33 zł
Quantity
61
Dimension [mm]
2 x 70 x 350
Thickness [mm]
2
Width [mm]
70
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350
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25.07 zł
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23 %
Price
30.84 zł
Quantity
52
Dimension [mm]
2 x 70 x 400
Thickness [mm]
2
Width [mm]
70
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400
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28.74 zł
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23 %
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35.35 zł
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45
Dimension [mm]
2 x 70 x 500
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2
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70
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500
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35.47 zł
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23 %
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43.63 zł
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37
Dimension [mm]
2 x 80 x 250
Thickness [mm]
2
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80
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250
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20.18 zł
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23 %
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24.82 zł
Quantity
65
Dimension [mm]
2 x 80 x 300
Thickness [mm]
2
Width [mm]
80
Length [mm]
300
Price without tax
24.46 zł
Tax
23 %
Price
30.09 zł
Quantity
53
Dimension [mm]
2 x 80 x 350
Thickness [mm]
2
Width [mm]
80
Length [mm]
350
Price without tax
28.13 zł
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23 %
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34.60 zł
Quantity
46
Dimension [mm]
2 x 80 x 400
Thickness [mm]
2
Width [mm]
80
Length [mm]
400
Price without tax
32.41 zł
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23 %
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39.87 zł
Quantity
40
Dimension [mm]
2 x 80 x 500
Thickness [mm]
2
Width [mm]
80
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500
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40.36 zł
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23 %
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49.64 zł
Quantity
32
Dimension [mm]
2 x 90 x 250
Thickness [mm]
2
Width [mm]
90
Length [mm]
250
Price without tax
24.46 zł
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23 %
Price
30.09 zł
Quantity
53
Dimension [mm]
2 x 90 x 300
Thickness [mm]
2
Width [mm]
90
Length [mm]
300
Price without tax
30.58 zł
Tax
23 %
Price
37.61 zł
Quantity
43
Dimension [mm]
2 x 90 x 350
Thickness [mm]
2
Width [mm]
90
Length [mm]
350
Price without tax
36.69 zł
Tax
23 %
Price
45.13 zł
Quantity
35
Dimension [mm]
2 x 90 x 400
Thickness [mm]
2
Width [mm]
90
Length [mm]
400
Price without tax
36.69 zł
Tax
23 %
Price
45.13 zł
Quantity
35
Dimension [mm]
2 x 90 x 500
Thickness [mm]
2
Width [mm]
90
Length [mm]
500
Price without tax
48.92 zł
Tax
23 %
Price
60.17 zł
Quantity
26
Dimension [mm]
2 x 100 x 250
Thickness [mm]
2
Width [mm]
100
Length [mm]
250
Price without tax
30.58 zł
Tax
23 %
Price
37.61 zł
Quantity
43
Dimension [mm]
2 x 100 x 300
Thickness [mm]
2
Width [mm]
100
Length [mm]
300
Price without tax
30.58 zł
Tax
23 %
Price
37.61 zł
Quantity
43
Dimension [mm]
2 x 100 x 350
Thickness [mm]
2
Width [mm]
100
Length [mm]
350
Price without tax
36.69 zł
Tax
23 %
Price
45.13 zł
Quantity
35
Dimension [mm]
2 x 100 x 400
Thickness [mm]
2
Width [mm]
100
Length [mm]
400
Price without tax
42.80 zł
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23 %
Price
52.65 zł
Quantity
30
Dimension [mm]
2 x 100 x 500
Thickness [mm]
2
Width [mm]
100
Length [mm]
500
Price without tax
55.04 zł
Tax
23 %
Price
67.70 zł
Quantity
23
Dimension [mm]
2 x 125 x 250
Thickness [mm]
2
Width [mm]
125
Length [mm]
250
Price without tax
36.69 zł
Tax
23 %
Price
45.13 zł
Quantity
35
Dimension [mm]
2 x 125 x 300
Thickness [mm]
2
Width [mm]
125
Length [mm]
300
Price without tax
42.80 zł
Tax
23 %
Price
52.65 zł
Quantity
30
Dimension [mm]
2 x 125 x 350
Thickness [mm]
2
Width [mm]
125
Length [mm]
350
Price without tax
48.92 zł
Tax
23 %
Price
60.17 zł
Quantity
26
Dimension [mm]
2 x 125 x 400
Thickness [mm]
2
Width [mm]
125
Length [mm]
400
Price without tax
55.04 zł
Tax
23 %
Price
67.70 zł
Quantity
23
Dimension [mm]
2 x 125 x 500
Thickness [mm]
2
Width [mm]
125
Length [mm]
500
Price without tax
67.27 zł
Tax
23 %
Price
82.74 zł
Quantity
19
Dimension [mm]
2 x 150 x 250
Thickness [mm]
2
Width [mm]
150
Length [mm]
250
Price without tax
42.80 zł
Tax
23 %
Price
52.65 zł
Quantity
30
Dimension [mm]
2 x 150 x 300
Thickness [mm]
2
Width [mm]
150
Length [mm]
300
Price without tax
48.92 zł
Tax
23 %
Price
60.17 zł
Quantity
26
Dimension [mm]
2 x 150 x 350
Thickness [mm]
2
Width [mm]
150
Length [mm]
350
Price without tax
55.04 zł
Tax
23 %
Price
67.70 zł
Quantity
23
Dimension [mm]
2 x 150 x 400
Thickness [mm]
2
Width [mm]
150
Length [mm]
400
Price without tax
61.15 zł
Tax
23 %
Price
75.22 zł
Quantity
21
Dimension [mm]
2 x 150 x 500
Thickness [mm]
2
Width [mm]
150
Length [mm]
500
Price without tax
79.50 zł
Tax
23 %
Price
97.78 zł
Quantity
16
Dimension [mm]
2 x 200 x 250
Thickness [mm]
2
Width [mm]
200
Length [mm]
250
Price without tax
55.04 zł
Tax
23 %
Price
67.70 zł
Quantity
23
Dimension [mm]
2 x 200 x 300
Thickness [mm]
2
Width [mm]
200
Length [mm]
300
Price without tax
61.15 zł
Tax
23 %
Price
75.22 zł
Quantity
21
Dimension [mm]
2 x 200 x 350
Thickness [mm]
2
Width [mm]
200
Length [mm]
350
Price without tax
73.38 zł
Tax
23 %
Price
90.26 zł
Quantity
17
Dimension [mm]
2 x 200 x 400
Thickness [mm]
2
Width [mm]
200
Length [mm]
400
Price without tax
79.50 zł
Tax
23 %
Price
97.78 zł
Quantity
16
Dimension [mm]
2 x 200 x 500
Thickness [mm]
2
Width [mm]
200
Length [mm]
500
Price without tax
103.96 zł
Tax
23 %
Price
127.87 zł
Quantity
12

OUR STEEL IS FOR YOU, IF:

You value precisely cut material
We cut steel using band saws, ensuring straight edges. We do not use guillotine shears, which can warp sheets and round their edges.
Minor scratches or residue are not an issue for you
Sometimes, a single steel sheet passes through the saw multiple times, which may cause slight surface scratches. Occasionally, delicate spot traces of surface corrosion (thin residue) may appear on the steel due to coolant remnants from the cutting process. Both scratches and residue can be easily removed during grinding. If you require steel with a perfectly clean surface, our product will not meet your expectations.
You can straighten minor surface deviations yourself
We strive to deliver perfectly flat steel pieces, but we cannot guarantee 100% flatness. Any slight surface curvature is not a material defect but rather a result of mill tolerances (flatness tolerances for rolled products). An experienced knifemaker can handle such a curvature in no time.
You want to buy steel from trusted supplier
We source our steel from the largest manufacturers in Europe and beyond. Each delivery is precisely marked with an industrial hand jet printer to prevent errors during cutting and storage.
You don't like overpaying
Our mission is to provide you with a piece of steel that is as close as possible to the shape of the knife you want to make. With us, you don't have to buy a large piece of steel and make unnecessary supplies or throw unnecessary surpluses in the trash.

Example photo of a steel sheet:

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What is Steel 15N20 / 1.5634 / 75Ni8?

The steel we offer is 1.5634, also known as 75Ni8 (similar in its parameters to 15N20 steel), it's a nickel-alloyed tool steel highly valued in the knifemaking industry. Its chemical composition and mechanical properties make it a versatile material for crafting durable, high-performance blades.

Chemical Composition of Steel 1.5634 / 75Ni8

  Element
 Composition
  Carbon (C) 0,72% - 0,78%
  Manganese (Mn)
0,30% - 0,50%
  Silicon (Si) 0,15% - 0,35%
  Chromium (Cr) max 0,15%
  Molybdenum (Mo) max 0,10%
  Nickel (Ni) 1,80% - 2,10%

This steel contains carbon (0.72 to 0.78%) for hardness and strength, along with silicon (0.15 to 0.35%) for improved heat resistance. Manganese (0.30 to 0.50%) enhances wear resistance, while chromium (max 0,15%) adds durability. Nickel (1.80 to 2.10%) significantly boosts toughness and flexibility, making it ideal for impact-resistant applications.

Heat Treatment of 1.5634 / 75Ni8 Steel

Heat treatment difficulty shown at the top of this page reflects the most common choice in our survey of Polish knifemakers, prepared with input from an experienced heat treater. Please treat it as community guidance, not a specification.

“EASY-TO-HARDEN” denotes a more forgiving steel — one that delivers predictable, useful results even with minor deviations in process parameters.

“DIFFICULT-TO-HARDEN” calls for tight process control; small mistakes can quickly degrade the final outcome.

A FEW WORDS ON HEAT TREATMENT

Heat treatment is as much craft as it is science. Results depend on many variables: steel grade, blade thickness, furnace and atmosphere, soak temperature and time, quench medium and its temperature, and the tempering schedule.

At IK STAL we value transparency and reliable sources. Rather than promising one-size-fits-all recipes, we share manufacturers’ baseline data so you can adapt it to your own workshop. However, the data provided by manufacturers is not always detailed enough to constitute a complete “recipe” for heat-treating a thin knife. For specific settings, we encourage you to consult an experienced heat treater.

Hardening of 1.5634 / 75Ni8 Steel

Austenitizing

In the literature, different austenitizing temperatures are given for 1.5634 / 75Ni8 steel:

  • Low austenitizing temperatures (recommended):
    According to DIN EN 10132-4, the reference austenitizing range is 820–850°C (1505–1560 °F). Hardness after quenching, without tempering, should then be at least 60 HRC.
    If 1.5634 / 75Ni8 is hardened together with 1.2842, it is better to stay at the lower end, around 820°C (1505°F).
  • High austenitizing temperatures (as suggested by some manufacturers):
    Heat to 850–880°C (1560–1620°F), these temperatures are recommended for applications other than knifemaking. It is worth noting that the working hardness for many industrial applications, where high toughness is required, is only in the range of 44–52 HRC.

Practical austenitizing guidelines:

  • The thicker the blade, the longer it should stay in the furnace.
  • Keeping the steel in the furnace too long can lead to grain growth; too short a time leads to incomplete austenitizing (incomplete microstructural transformation). Put simply: at the correct temperature, leaving the steel in the furnace a little longer usually does less harm than taking it out too early. The biggest mistake is using an incorrect austenitizing temperature.

Quenching

After austenitizing, 1.5634 / 75Ni8 steel is rapidly cooled. Quenching media: oil. 

Tempering of 1.5634 / 75Ni8 Steel

For hardening at 820°C (1505°F), typical tempering temperatures are:

  • 180°C (355°F) → hardness max 60 HRC,
  • 200°C (390°F) → slightly lower hardness, around 58 HRC.

Tempering should be performed twice for 1 hour each.

Key Properties of 1.5634 / 75Ni8 / 15N20 Steel

This steel is renowned for its unique balance of toughness and wear resistance. The high nickel content ensures excellent impact resistance and flexibility. Additionally, its forgeability makes it an excellent choice for creating Damascus steel patterns.

Top Applications for Steel 15N20 / 1.5634 / 75Ni8 in Knifemaking

Survival Knives

This steel’s toughness ensures reliability in outdoor and heavy-duty settings.

Axes and Machetes

Tools that demand extreme durability and toughness are perfectly suited to 1.5634 steel.

Damascus Steel Blades

When paired with steels like 1.2842 (AISI O2), 1.5634 creates striking, high-contrast patterns with exceptional performance.

Precision Tools and Razors

Combined with 1.3505 (100Cr6), it provides exceptional sharpness and wear resistance for high-precision applications.

Combining Steel 15N20 / 1.5634 / 75Ni8 with Other Alloys

  • With 1.2842 (AISI O2): Adds toughness and edge retention, ideal for utility blades.
  • With 1.3505 (100Cr6): Increases sharpness and wear resistance, perfect for razors and fine cutting tools.
  • With 1.2767 (45NiCrMo16): Enhances machinability and toughness, making it suitable for robust tools.

Comparison of 1.5634 / 75Ni8 steel with similar grades according to international standards (PN, EN, DIN, AISI, GOST and others)

Country / Standard Steel Designation Remarks
Poland (PN) No equivalent No official PN equivalent
Europe (EN 10132-4) 75Ni8 Official EN 10132-4 designation for spring and tool steels
Germany (DIN) 1.5634 / 75Ni8 Classification per DIN EN 10132-4
Austria (Böhler) No equivalent No Böhler trade name assigned. Uddeholm catalogues mention nickel strip UHD 15 N20 steel (C 0.75 %, Ni 2.0 %)
USA (AISI/ASTM) AISI L6 (approximate) Approximate AISI equivalent; a nickel‐steel tool grade
UK (BS) No equivalent No BS equivalent assigned
France (AFNOR) 75Ni8RR AFNOR equivalent for spring and tool steel
Italy (UNI) No equivalent No UNI equivalent assigned
Czech Republic (ČSN) No equivalent No ČSN equivalent assigned
Japan (JIS) No equivalent No JIS equivalent assigned
Russia (GOST) No equivalent No GOST equivalent assigned

Conclusion – Why Choose 15N20 / 1.5634 / 75Ni8 Steel?

Steel 1.5634 is a proven material in the knifemaking world, known for its outstanding properties. Its excellent toughness, edge retention, and flexibility make it suitable for a wide range of applications, from utility knives and decorative Damascus steel. Additionally, its ability to pair with other alloys enhances its performance for specialized uses. For knifemakers seeking reliable and versatile steel, 1.5634 offers exceptional value and results.

15N20 / 1.5634 / 75Ni8 knife steel flat bar for making knives
1. What makes Steel 1.5634 ideal for knifemaking?

Steel 1.5634 offers a unique combination of toughness, flexibility, and wear resistance, making it suitable for a wide range of knife types and applications, including chef knives, hunting knives, and decorative Damascus steel.

2. How should Steel 1.5634 be heat-treated?

For hardening, heat the steel to 800-820°C (1470-1510°F) and quench in oil. Follow this with tempering at 150-200°C (300-390°F) to achieve the desired balance between hardness and toughness.

3. Can Steel 1.5634 be used for Damascus blades?

Yes, Steel 1.5634 is an excellent choice for Damascus blades due to its forgeability and ability to create high-contrast patterns when combined with other steels like 1.2842 (AISI O2).

4. What other steels pair well with 1.5634?

Common pairings include 1.2842 (AISI O2) for enhanced edge retention, 1.3505 (100Cr6) for sharpness and wear resistance, and 1.2767 (45NiCrMo16) for improved machinability and toughness.

5. What knife types benefit most from Steel 1.5634?

Steel 1.5634 is ideal for chef knives, filleting knives, hunting knives, survival tools, axes, machetes, and precision blades like razors.