45A - JB /T 7026-2004

Grade	45A
Corresponding Standard	JB /T 7026-2004 Specification of the Rotors Forgings Used Below 5oMW Turbine Generator
Classification	Alloy Steel

45A Chemical Element Composition Content (%)

Component	C	Si ^①	Mn	P	S	Cu
Minimum Value	0.42	0.17	0.5	-	-	-
Maximum Value	0.5	0.37	0.8	0.03	0.03	0.2

① For steels produced by the vacuum carbon deoxidation process, the silicon content is permitted to be not greater than 0.10 %.

45A Mechanical Properties

Forging Class，Location of Test Specimens	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Impact Energy Absorption KV2 J
II，Longitudinal at the Shaft End	≥520	ReL ≥265	≥20	≥30	≥40
II，Tangential at the Shaft Body	≥520	≥265	≥18	≥27	≥30

45A Corresponding Standards(Same grade name, different standards)

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