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ASTM A350 LF2 Carbon Steel

Keywords: ASTM A350 LF2 Carbon Steel, ASTM A350, ASTM A350-LF2, Carbon steel

ASTM A350-LF2 Temperature range (-50 to 800 deg. F) Where corrosion resistance is not important.

This material is heat treated “Forgings of [LF2] shall be furnished in the normalized, or in the normalized and tempered, or in the quenched and tempered condition…”

TYPE: Carbon steel applied in cold temperature service usually used in the normalized condition.

Nominal Composition of ASTM A350 LF2
Element Weight %
Carbon 0.30 max
Silicon 0.15 – 0.30
Manganese 0.6 – 1.35
Phosphorus 0.35 max
Sulphur 0.040 max
Molybdenum 0.12 max
Copper 0.40 max
Chromium 0.30 max
Nickel 0.40 max
Vanadium 0.08 max
Niobium 0.02 max

Mechanical Properties of ASTM A350 LF2

Condition: Forgings of LF2 shall be furnished in the normalized, or in the normalized and tempered, or in the quenched and tempered condition.

Property Values
Ultimate Tensile Strength 485 – 655 N/mm2
0.2% Yield Strength 250 N/mm2 min
Elongation 22% min
Reduction of Area 30% min
Charpy Impact Toughness 20 average / 16 min J at -46o C
Hardness 197 HB

General Scope

A general carbon steel used in the manufacture of flanges and fittings.

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