Group

Subgroup

Structural and constructional steels

Material properties

Comment

Application

GB/T 699 (1999) Quality carbon steels

45Mn (China / GB)Material

MinDimension Max Approx

Yield Stress[MPa]

Semi finished; Quenched and tempered; d (or t) <= 25

mm

372 - -

MinDimension Max Approx

Tensile Stress[MPa]

Semi finished; Quenched and tempered; d (or t) <= 25

mm

617 - -

MinDimension Max Approx

Elongation A5 [%]

Semi finished; Quenched and tempered; d (or t) <= 25

mm

15.0 - -

MinDimension Max Approx

Impact [J]

Semi finished; Quenched and tempered; d (or t) <= 25

mm

39 - -

HardnessDimension

Hardness

Semi finished; Quenched and tempered; d (or t) <= 25

mm

217-241 HB

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Min Max

Chemical Composition [%]

Criterion Approx

C 0.4200 0.5000 -

Si 0.1700 0.3700 -

Mn 0.7000 1.0000 -

P - 0.0350 -

S - 0.0350 -

Cr - 0.2500 -

Ni - 0.2500 -

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