GH4080A 80A - GB /T 12773-2021

Grade	GH4080A
Other Names
Corresponding Standard	GB /T 12773-2021 Valve Steel and Superalloy Bars for Internal Combustion Engines
Classification	Nickel and Nickel Alloys

GH4080A Chemical Element Composition Content (%)

Component	Fe	C	Si	Mn	P	S	Cr	Cu	Ti	B	Co	Al	More
Minimum Value	-	0.04	-	-	-	-	18	-	1.8	-	-	1	Ni:Remainder
Maximum Value	3	0.1	1	1	0.02	0.015	21	0.2	2.7	0.008	2	1.8	Ni:Remainder

GH4080A Mechanical Properties

condition	Test Temperature	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
Sample d=25	Room Temperature	1050~1160°C Solution treated + 690~710°C×16h Air cooling	≥1100	Rp0.2: ≥725	≥15	≥25	≥32HRC
Bar or Coil	Room Temperature	Solution treated					≤325
sample		Solution treated + Aging	High temperature short-term tensile strength 1050	High temperature short-term yield strength 700
sample		Solution treated + Aging	High temperature short-term tensile strength 1030	High temperature short-term yield strength 650
sample		Solution treated + Aging	High temperature short-term tensile strength 1000	High temperature short-term yield strength 650
sample		Solution treated + Aging	High temperature short-term tensile strength 930	High temperature short-term yield strength 600
sample		Solution treated + Aging	High temperature short-term tensile strength 820	High temperature short-term yield strength 600
sample		Solution treated + Aging	High temperature short-term tensile strength 680	High temperature short-term yield strength 500
sample		Solution treated + Aging	High temperature short-term tensile strength 500	High temperature short-term yield strength 450

1 Approximate Comparison Table Deformed High-Temperature Alloy

2 Approximate Comparison Table Deformed High-Temperature Alloy

China	United States	International Organization for Standardization	European Standard
GB	SAE	ISO	EN	Numerical Grade
GH4080A 80A①	HEV5	NiCr20TiAl	NiCr20TiAl	2.4952

GH4080A Corresponding Standards(Same grade name, different standards)

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