20MnNb6 1.0471 - EN 10216-2-2024

Grade	20MnNb6
European Standard Steel Grade	1.0471
Corresponding Standard	EN 10216-2-2024 Seamless Steel Tubes for Pressure Purposes - Technical Delivery Conditions - Part 2: Non-Alloy and Alloy Steel Tubes with Specified Elevated Temperature Properties
Classification	Alloy Steel

20MnNb6 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cu	Nb	Al
Minimum Value	-	0.15	1	-	-	-	0.15	-
Maximum Value	0.22	0.35	1.5	0.025	0.01	0.3	0.1	0.06

20MnNb6 Mechanical Properties

wall thickness T mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
T≤16	500~650	ReH ≥355	l: ≥22；t: ≥20	0°C: l: ≥40；t: ≥27
16＜T≤40	500~650	ReH ≥345	l: ≥22；t: ≥20	0°C: l: ≥40；t: ≥27
40＜T≤60	500~650	ReH ≥335	l: ≥22；t: ≥20	0°C: l: ≥40；t: ≥27

• l = longitudinal; t = transverse.

20MnNb6 Corresponding Standards(Same grade name, different standards)

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