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ISO 898 12.9

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ISO 898 Class 12
ISO 898 12.9


Base Element Fe(Iron)

Element Min Max
C(Carbon) 0.50%
P(Phosphorus) 0.025%
S(Sulphur) 0.025%
B (Boron) 0.003%
Mechanical Properties Min Max
Hardness (Brinell) 380 HB 429 HB
Hardness (Rockwell C) 39 HRC 44 HRC
Hardness (Vickers) 285 435 HV
Tensile 1220 MPA
0.2% Lower Yield Strength 1100 MPa
Elongation 8%
Reduction of Area 44%

Heat treatment; quenched and tempered.


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