N08031 - ASTM B649-2021

USA UNS	N08031
Corresponding Standard	ASTM B649-2021 Ni-Fe-Cr-Mo-Cu-N Low-Carbon Alloy and Cr-Ni-Fe-N Low-Carbon Alloy Bar and Wire, Ni-Cr-Fe-Mo-N Alloy Wire, and Ni-Fe-Cr-Mo-N Alloy Bar
Classification	Special Alloy Steel

Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	N	More
Minimum Value	-	-	-	-	-	26	30	1	6	0.15	Fe:余量
Maximum Value	0.015	0.3	2	0.02	0.01	28	32	1.4	7	0.25	Fe:余量

Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %
All specifications	Cold Finishing and Hot Finishing Annealing	≥650	≥270	Gauge 50.8mm: ≥ 40

• For cold finished and annealed wire only, tensile strength 90 000 to 120 000 psi (620 to 830 MPa).

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