GH4720Li - GB /T 40313-2021 - H2ABC

中文版

Grade	GH4720Li
Corresponding Standard	GB /T 40313-2021 Specification for Wrought Superalloy Forging Disks
Classification	Special Alloy Steel

GH4720Li Chemical Element Composition Content (%)

Component	Fe	C	Si	Mn	P	S	Cr	Cu	Mo	As	N	Ti	W	Zr	B	Co	Pb	Al	Sn	Se	Bi	Sb	Ag	Ca	O	Te	More
Minimum Value	-	0.01	-	-	-	-	15.5	-	2.75	-	-	4.75	1	0.025	0.01	14	-	2.25	-	-	-	-	-	-	-	-	Ni:余量；Tl≤0.00005
Maximum Value	0.5	0.02	0.2	0.15	0.015	0.002	16.5	0.1	3.25	0.0025	0.0032	5.25	1.5	0.05	0.02	15.5	0.001	2.75	0.0012	5.0E-5	5.0E-5	0.0025	0.0005	0.0005	0.002	0.0005	Ni:余量；Tl≤0.00005

GH4720Li Mechanical Properties

form	Test Temperature	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Impact Energy Absorption KV2 J
Forged Disc	Room Temperature	≥1530	≥1100	≥9	≥10	-
Forged Disc		≥1350	≥1025	≥10	≥10	-
sample		High temperature long-term performance: Stress 830MPa, Creep fracture time ≥ 30h		Creep elongation after fracture: ≥ 5%
sample		High temperature long-term performance: Stress 530MPa, Creep fracture time ≥ 30h		Creep elongation after fracture: ≥ 5%
sample		High temperature creep performance: Stress 730MPa, Creep elongation time 100h		Creep elongation: ≤0.13%

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