20MnMoNi4-5 1.6311 - EN 10028-2-2009

Grade	20MnMoNi4-5
European Standard Steel Grade	1.6311
Corresponding Standard	EN 10028-2-2009 Flat products made of steels for pressure purposes Part 2 Non-alloy and alloy steels with specified elevated temperature properties
Classification	Alloy Steel

20MnMoNi4-5 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu ^⑤	Mo	N	V
Minimum Value	0.15	-	1	-	-	-	0.4	-	0.45	-	-
Maximum Value	0.23	0.4	1.5	0.02	0.01	0.2	0.8	0.2	0.6	0.012	0.02

20MnMoNi4-5 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≤40	Tempering (+QT)	590~750	≥470	≥18	* ≥50
40＜t≤60	Tempering (+QT)	590~730	≥460	≥18	≥50
60＜t≤100	Tempering (+QT)	570~710	≥450	≥18	≥50
100＜t≤150	Tempering (+QT)	570~710	≥440	≥18	≥50
150＜t≤250	Tempering (+QT)	560~700	≥400	≥18	≥50

Approximate Comparison Table Pressure-Bearing Flat Steel

International Organization for Standardization	European Standard
ISO	EN	Numerical Grade
20MnMoNi 4-5	20MnMoNi 4-5	1.6311

20MnMoNi4-5 Corresponding Standards(Same grade name, different standards)

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