4Cr10Si2Mo - GJB 2294-1995

Grade	4Cr10Si2Mo
Corresponding Standard	GJB 2294-1995 Specification for Stainless and Heat-Resisting Steel Bars for Aviation
Classification	Martensitic Stainless Steel
Properties	Corrosion Resistance Forgability Weldability

4Cr10Si2Mo Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni ^①	Mo
Minimum Value	0.35	1.9	-	-	-	9	-	0.7
Maximum Value	0.45	2.6	0.7	0.03	0.025	10.5	0.6	0.9

① The allowable residual element content.

4Cr10Si2Mo Mechanical Properties

condition	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
Steel Rod	Anneal at 1020 ± 20 °C for 1 hour, then furnace cool to 750 °C. Hold at 750 °C for 3–4 hours, followed by air cooling.					197~269
Sample d=25mm	Quenching or Solution + Tempering or Aging ①	≥930	≥735	≥10	≥35	269~341	≥16

New and Old Grade Replacement List

4Cr10Si2Mo Corresponding Standards(Same grade name, different standards)

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