GH4738 - GB /T 40313-2021

Grade	GH4738
Corresponding Standard	GB /T 40313-2021 Specification for Wrought Superalloy Forging Disks
Classification	Nickel and Nickel Alloys

GH4738 Chemical Element Composition Content (%)

Component	Fe	C	Si	Mn	P	S	Cr	Cu	Mo	N	Ti	Zr	B	Co	Pb	Al	Sn	Se	Mg	Bi	Sb	Ag	Ca	O	Te	More
Minimum Value	-	0.02	-	-	-	-	18	-	3.5	-	2.8	0.02	0.003	12	-	1.2	-	-	-	-	-	-	-	-	-	Ni:余量；Tl≥0.0001；Al+Ti≥4.3
Maximum Value	2	0.05	0.15	0.1	0.015	0.002	21	0.1	5	0.005	3.3	0.08	0.01	15	0.001	1.6	0.005	0.0003	0.005	0.0001	0.0003	0.0005	0.005	0.002	5.0E-5	Ni:余量；Tl≥0.0001；Al+Ti≥4.3

GH4738 Mechanical Properties

form	Test Temperature	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW	Impact Energy Absorption KV2 J
sample	Room Temperature	≥1250	≥880	≥15	≥18	341~401	-
sample		≥1150	≥830	≥12	≥18	-	-
sample		High temperature long-term performance: Stress 550MPa, Creep fracture time tu ≥ 23h Notched sample creep fracture time tue > tu		Creep elongation after fracture Au ≥5
sample		High temperature creep performance: Stress 555MPa, Creep elongation time tfx: 23h		Creep elongation Af ≤0.2

Approximate Comparison Table Deformed High-Temperature Alloy

GH4738 Corresponding Standards(Same grade name, different standards)

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