21Cr12MoV S46020 2Cr12MoV - GB /T 8732-2014

Grade	21Cr12MoV
China ISC	S46020
Old Grade
Corresponding Standard	GB /T 8732-2014 Steels of Blade for Steam Turbine
Classification	Martensitic Stainless Steel
Properties	Corrosion Resistance

21Cr12MoV Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V
Minimum Value	0.18	0.1	0.3	-	-	11	0.3	-	0.8	0.25
Maximum Value	0.24	0.5	0.8	0.03	0.02	12.5	0.8	0.3	1.2	0.35

• The chemical composition of the grade differs from that specified in GB/T 20878-2007.

21Cr12MoV Mechanical Properties

specimen d mm	Mark	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW	Impact Energy Absorption KV2 J
d=25	Group 1	quenched 1020~1070°C,oil cooled；tempered ≥650°C air cooled	900~1050	≥700	≥13	≥35	265~310	≥20
d=25	2 Groups	quenched 1020~1050°C,oil cooled；tempered 700~750°C air cooled	≤930	590~735	≥15	≥50	241~285	≥27
Steel		annealed 880~930°C slow cooling；high-temperature tempering rapid cooling					≤255

21Cr12MoV Corresponding Standards(Same grade name, different standards)

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!