15MnNiNbDR - GB /T 713.3-2023

Grade	15MnNiNbDR
Corresponding Standard	GB /T 713.3-2023 Steel Plate, Sheet and Strip for Pressure Equipments— Part 3: Low Alloy Steel with Specified Low Temperature Properties
Classification	Alloy Steel

15MnNiNbDR Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Ni	Mo	N	Nb
Minimum Value	-	0.15	1.2	-	-	0.3	-	-	0.015
Maximum Value	0.18	0.5	1.6	0.02	0.008	0.7	0.08	0.012	0.04

• When acid-soluble aluminium (Als) is used instead of Alt, the Als content should be no less than 0.015%. When the Nb+V+Ti content in steel is ≥0.015%, the Al content is not required.

15MnNiNbDR Mechanical Properties

thickness t mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
6≤t≤16	Normalizing or normalizing + tempering	530~630	ReL ≥370	≥20	-50°C ≥60
16＜t≤36	Normalizing or normalizing + tempering	530~630	ReL ≥360	≥20	-50°C ≥60
36＜t≤60	Normalizing or normalizing + tempering	520~620	ReL ≥340	≥20	-50°C ≥60

• When the yield phenomenon is not obvious, the specified plastic extension strength Rp0.2 is adopted.

15MnNiNbDR Corresponding Standards(Same grade name, different standards)

1	GB 3531-2014
	15MnNiNbDR
2	GB /T 150.2-2011
	15MnNiNbDR
3	GB /T 713.3-2023
	15MnNiNbDR

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