GX2NiCrMo28-20-2 1.4458 - ISO 4991-2024

Grade	GX2NiCrMo28-20-2
ISO Numeric Designation	1.4458
Corresponding Standard	ISO 4991-2024 Steel castings for pressure purposes
Classification	Cast Steel

GX2NiCrMo28-20-2 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	N
Minimum Value	-	-	-	-	-	19	26	-	2	-
Maximum Value	0.03	1	2	0.035	0.025	22	30	2	2.5	0.2

GX2NiCrMo28-20-2 Mechanical Properties

thickness t mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
t ≤ 150	Solution Treatment (+AT) Solution treatment 1100~1180℃	430~630	Rp1.0 ≥190	A: ≥30	Room temperature: ≥60 -196°C: ≥60

Approximate Comparison Table Cast Steel

China	United States	International Organization for Standardization
GB	UNS	ISO	Numerical Grade
ZG03Ni28Cr21Mo2	N08007	GX2NiCrMo28-20-2	1.4458

GX2NiCrMo28-20-2 Corresponding Standards(Same grade name, different standards)

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