A350-LF2

A350-LF2

ASTM A350 Grade LF2 is a general Carbon steel by moderate strength and impact toughness usually supplied this condition:

Normalized

Normalized and Tempered

Quench and Tempered condition.

Standard Designation	Grade, Class, Type, Symbol or Name	Steel Number	UNS Number	Product Form/Heat Treatment	Yield Strength, min	Tensile Strength, min	Elongation, min, %	Other

					N/mm² or MPa	N/mm² or MPa
ASTM A 350/A 350M-02b	LF2, Class 1	—	K03011	N, NT, or QT	250	485-655	22	20 J at -46°C

	LF2, Class 2							27 J at -18°C

Composition:

%C	%Si	%Mn	%P	%S	Cr	Mo	Ni	V	Nb	Cr+Mo	Cu
Max0.3	0.15-0.3	0.6-1.35	0.035	0.05	Max0.3	max0.12	Max0.4	Max0.08	Max0.2	max0.32	Max0.4

Hot working:

Forging temperature range: 1100-850℃

Note: Heat to 1200 ℃. Do not forge below 850..

Heat treatment:

Normalizing ℃	Hardening temperature for quenching in Water ℃	Tempering temperature ℃
860-920	890-960	590

Main application:

Flanges and fittings, and applications which require cold temperature service where corrosion resistance is not important.

Shape of product:

Round, other shape depend on customer needs