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A350 LF-1 (K03009)

ASTM A350 Grade LF2 is a general Carbon steel usually supplied in the Normalised, Normalised and Tempered or Quench and Tempered condition.
It is typified by having moderate strength and impact toughness and is used extensively for the manufacture of flanges and fittings, and applications which require cold temperature service where corrosion resistance is not important.

Typical Chemical composition




0.15 – 0.30%


0.60 – 1.35%






<0.30 %









Mechanical Property Requirements

Tensile Strength Mpa

Yield (0.2%) MpA

Elongation %

Reduction of Area %

Charpy J -46°C

Hardness HB

485-655 (70-95KSi)

>250 (36KSi)






Forging Temperature for this material should be 900 – 1200oC
Soak times should be kept to a minimum to avoid heavy scaling, but sufficient time should be given to allow centre to achieve furnace temperature.
After forging pieces should be allowed to cool in still air.

Heat Treatment

Normalising – Heat to 860 – 920°C for a time commensurate with ruling section, Air cool (If Required)

Hardening – Heat to 890 – 960oC for a time commensurate with ruling section and quench in Water.

Tempering – Re-heat to 590oC Minimum as required, dependent on final required properties. Hold for a time commensurate with the ruling section and cool in still in air.


ASTM A350 LF2 has good to very good machinability, dependent on condition, and operations such as sawing, turning, broaching, milling etc can be accomplished satisfactorily using standard machine tool manufacturers recommended speeds and feeds.


ASTM A350 LF2 is readily weldable by any technique.


Limitation of Liability and Disclaimer of Warranty: In no event will South Coast Industrial Metals or any of its affiliates be liable for any damages arising from the use of the information included in this document or that it is suitable for the ‘applications’ noted. We believe the information and data provided to be accurate to the best of our knowledge but, all data is considered typical values only. It is intended for reference and general information and not recommended for specification, design or engineering purposes. South Coast Industrial Metals, Inc. assumes no implied or express warranty in regard to the creation or accuracy of the data provided in this document.