ASTM A 350 Grade LF9 Structural and constructional steels
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ASTM A 350 Grade LF9 Chemical Composition
A350/A350M: 2026 / Standard Specification for Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components
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ASTM A 350 Grade LF9 Physical Properties
Temperature
This material has 32 properties — only a subset is shown here.
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ASTM A 350 Grade LF9 Heat Treatments
- Furnished in the normalized, or normalized and tempered, or quenched and tempered condition. Quenching shall consist of either fully austenitizing the forgings followed by quenching in a suitable liquid medium, or using a multiple stage procedure whereby the forging is first fully austenitized and rapidly cooled, then reheated to partially re-asutenitize, followed by quenching in a suitable liquid medium. Forgings, when tempered, shall be tempered at 593°C (1100°F), minimum, holding at temperature a minimum of 30 min/25 mm (30 min/in.) of maximum thickness, but in no case less than 30 min.
ASTM A 350 Grade LF9 Mechanical Properties
Temperature
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ASTM A 350 Grade LF9 International Equivalent Materials
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Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.
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- 3Cross References
- 11Composition
- 6Mechanical Properties
- 3Physical Properties
- 1Heat Treatment
- -Metallography
- -Machinability
- -Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- 1Creep
- 2Joints
- -Coatings
- 4Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
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