GH6783 - DL /T 439-2018

Grade	GH6783
Corresponding Standard	DL /T 439-2018 The technical guide for high-temperature bolt of fossil-fired power plant
Classification	Alloy Steel

GH6783 Chemical Element Composition Content (%)

Component	Fe	C	Si	Mn	P	S	Cr	Ni	Cu	Ti	Nb	B	Al	More
Minimum Value	24	-	-	-	-	-	2.5	26	-	-	2.5	0.003	5	Co:余量
Maximum Value	27	0.03	0.5	0.5	0.015	0.015	2.5	30	0.5	0.4	3.5	0.012	6	Co:余量

GH6783 Mechanical Properties

condition	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
Bolt Material	Room Temperature	≥1100	≥725	≥12	≥20	≤360	-

GH6783 Corresponding Standards(Same grade name, different standards)

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