N07750 Grade 688 - ASTM B 637-2018 - H2ABC

中文版

USA UNS	N07750
Old Grade
Corresponding Standard	ASTM B 637-2018 Standard Specification for Precipitation-Hardening and Cold Worked Nickel Alloy Bars, Forgings, and Forging Stock for Moderate or High Temperature Service
Classification	Nickel and Nickel Alloys
Properties	Corrosion Resistance

Chemical Element Composition Content (%)

Component	Fe	C	Si	Mn	S	Cr	Ni	Cu	Ti	Nb	Co	Al	More
Minimum Value	5	-	-	-	-	14	70	-	2.25	0.5	-	0.4	Nb+Ta:07~1.20
Maximum Value	9	0.08	0.5	1	0.01	17	-	0.5	2.75	2.5	1	1	Nb+Ta:07~1.20

Mechanical Properties

heat treatment，thickness t in	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
Class 1, 2100°F (1149°C) solution + stabilization + precipitation hardening	psi ≥140000	psi ≥90000	≥8		≥262
Class 2, 1800°F (982°C) solution + precipitation hardening, t≤2.5	psi ≥170000	psi ≥115000	≥18	≥18	302~363
2类，1800°F(982°C)固溶+沉淀硬化，2.5<t<4	psi ≥170000	psi ≥115000	≥15	≥15	302~363
Class 2, 1800°F (982°C) solution + precipitation hardening	psi ≥170000	psi ≥115000	≥10	≥12	302~363
Class 3, 2000°F (1093°C) solution annealing + precipitation hardening	psi 160000~185000	psi 100000~130000	≥20	≥20	267~363

Approximate Comparison Table Corrosion-Resistant Alloy

China		United States		Germany
GB	ISC	Commercial Grade	UNS	DIN EN/DIN	W-Nr.
NS 4102 GH 4145	H 07750	Hastelloy X750	N 07750	NiCr15Fe7TiAl	2.4669

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