25CrNiMoV - JB 7026-2018

Grade	25CrNiMoV
Corresponding Standard	JB 7026-2018 Rotor Forgings for 50 MW Turbine Generators and Below —Technical Specification
Classification	Alloy Steel

25CrNiMoV Chemical Element Composition Content (%)

Component	C	Si ^①	Mn	P	S	Cr	Ni	Cu	Mo	V
Minimum Value	0.2	0.17	0.3	-	-	1	1	-	0.25	0.05
Maximum Value	0.28	0.37	0.6	0.02	0.02	1.5	1.5	0.2	0.4	0.15

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

25CrNiMoV 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
IV，Longitudinal at the Shaft End	≥540	≥390	≥17	≥40	≥56
IV，Tangential at the Shaft Body	≥540	≥390	≥16	≥35	≥40
V，Longitudinal at the Shaft End	≥590	≥440	≥17	≥40	≥56
V，Tangential at the Shaft Body	≥590	≥440	≥16	≥35	≥40
V，Radial at the Shaft Body	≥540	≥390	≥15	≥35	≥40
VI，Longitudinal at the Shaft End	≥640	≥490	≥16	≥35	≥56
VI，Tangential at the Shaft Body	≥640	≥490	≥16	≥35	≥40
VI，Radial at the Shaft Body	≥590	≥440	≥14	≥30	≥40

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