GB/T 3078 Grade 45B quenched, tempered

Standards

GB/T 3078 Grade 45B

Equivalent standards

GB/T 3077 Grade 45B GB 11251 Grade 45B GB 5067 Grade 45B GB/T 3078 Grade 45B

Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Chemical composition

Element	Weight %
Mn	0.6 — 0.9
C	0.42 — 0.49
Si	0.17 — 0.37
Cr	0.0 — 0.3
Cu	0.0 — 0.3
Ni	0.0 — 0.3
S	0.0 — 0.035
P	0.0 — 0.035
B	5.0E-4 — 0.0035

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Properties

Mechanical
Hardness, Brinell [ HB ]	229.00 [-]

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.

Technological properties

Processing history
quenched, tempered