LF450K3 - GB /T 14383-2021

Performance Level	LF450K3
Corresponding Standard	GB /T 14383-2021 Forged Fitting, Socket-Welding and Threaded
Classification	Alloy Steel

LF450K3 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V	Nb
Minimum Value	-	0.15	-	-	-	-	3.25	-	-	-	-
Maximum Value	0.2	0.35	0.9	0.025	0.02	0.3	3.7	0.4	0.12	0.03	0.02

LF450K3 Mechanical Properties

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
450~655	≥260	≥21	≥35	≤197	-101°C；≥20

① Yield Point: For pipe fittings of the stainless steel category, the specified non-proportional elongation strength Rp0.2 is used. For pipe fittings of other material categories, when the lower yield strength ReL is not clearly defined, the specified non-proportional elongation strength Rp0.2 is used.

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