X 12 Ni 5 - ISO 9329-3-1997

Grade	X 12 Ni 5
Corresponding Standard	ISO 9329-3-1997 Unalloyed and Alloyed Steels with Specified Low Temperature Properties
Classification	Alloy Steel

X 12 Ni 5 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Ni	V
Minimum Value	-	-	0.3	-	-	4.5	-
Maximum Value	0.15	0.35	0.8	0.025	0.02	5.3	0.05

X 12 Ni 5 Mechanical Properties

wall 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
T≤25	Quenching + Tempering	510~710	ReH or Rp0.2 or Rp0.5 ≥390	17	l: ≥70 t: ≥50
25＜T≤40	Quenching + Tempering	510~710	ReH or Rp0.2 or Rp0.5 ≥380	17	l: ≥70 t: ≥50
/					T≤25 l: ≥70 t: ≥50 25＜T≤40 l: ≥65 t: ≥45
/					T≤40 l: ≥65 t: ≥45
/					T≤25 l: ≥65 t: ≥45 25＜T≤40 l: ≥60 t: ≥40
/					T≤25 l: ≥55 t: ≥35 25＜T≤40 l: ≥50 t: ≥30
/					T≤25 l: ≥50 t: ≥30 25＜T≤40 l: ≥45 t: ≥30
/					T≤25 l: ≥45 t: ≥30 25＜T≤40 l: ≥40 t: ≥27
/					T≤25 l: ≥40 t: ≥27

Approximate Comparison Table Pressure-Bearing Flat Steel

China	Japan	International Organization for Standardization	European Standard
GB	JIS	ISO	EN
07Ni5DR GB/T 713.4-2023	SL5N590 JIS G 3127-2021	X12Ni5 ISO 9328-4-2018	X12Ni5 EN 10028-4-2017

X12Ni5 Corresponding Standards(Same grade name, different standards)

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