45 - JB 7026-2018

Grade	45
Corresponding Standard	JB 7026-2018 Rotor Forgings for 50 MW Turbine Generators and Below —Technical Specification
Classification	Alloy Steel

45 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	0.02	0.02	0.2

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

45 Mechanical Properties

Forging Class，Location of Test Specimens	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Impact Energy Absorption KV2 J
II，Longitudinal at the Shaft End	≥520	≥265	≥20	≥30	≥40
II，Tangential at the Shaft Body	≥520	≥265	≥18	≥27	≥30

45 Corresponding Standards(Same grade name, different standards)

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