ASME SA-350 Grade LF2 Class 1 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country/Standard: United States / ASME

Data updates

Latest Update: 2026-01

Total number of updates: 6

Update History

2024-02 2024-01 2023-11 2023-10 2019-05

This material has 8776 properties — only a subset is shown here.

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ASME SA-350 Grade LF2 Class 1 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.30

UNIT

CAS NUMBER

7440-44-0

CRITERIA

CEV

VALUE

≤ 0.47

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.30

UNIT

CAS NUMBER

7440-47-3

CRITERIA

Cr+Mo

VALUE

val1

UNIT

CAS NUMBER

CRITERIA

Cr+Mo+Ni+V+Cu

VALUE

val1

UNIT

CAS NUMBER

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-50-8

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-03-1

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-02-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7723-14-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7704-34-9

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-62-2

ASME Boiler and Pressure Vessel Code An International Code Section II - Part A Ferrous Material Specifications / American Society of Mechanical Engineers / 2025

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ASME SA-350 Grade LF2 Class 1 Physical Properties

Temperature

≤ 0°C 0 - 30°C 30 - 100°C 100 - 300°C ≥ 300°C

PROPERTY / VALUE

Modulus of Elasticity

val1 GPa

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Density

7.67 — 7.86 kg/dm³

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Poisson Coefficient

val1

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Coefficient of Thermal Expansion (CTE)

val1 10^-6/°C

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Thermal Conductivity

60.4 W/(m∙°C)

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This material has 8776 properties — only a subset is shown here.

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ASME SA-350 Grade LF2 Class 1 Heat Treatments

Material shall be furnished in the normalized, or normalized and tempered, or quenched and tempered condition. At the option of the manufacturer, forgings furnished in the quenched and tempered condition may be normalized prior to the austenitize/quench operation.
Quenching shall consist of either: fully austenitizing the forgings followed by quenching in a suitable liquid medium, or a multi-stage process in which the forgings are fully austenitized and rapidly cooled, reheated to partially re-austenitize, and then quenched in a suitable liquid medium. Unless otherwise specified by the purchaser, the method selected shall be at the manufacturer’s option.
Tempering, when required, shall be performed at a minimum temperature of 590°C (1100°F), with a minimum holding time of 30 min/25 mm of maximum thickness, and not less than 30 minutes total.

ASME SA-350 Grade LF2 Class 1 Mechanical Properties

Temperature

≤ 0°C 0 - 30°C 30 - 100°C 100 - 300°C ≥ 300°C

PROPERTY / VALUE

Yield Strength, Rp0.2

val1 MPa

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Tensile Strength

485 — 655 MPa

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Elongation, A

22 %

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Reduction of Area

val1 %

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Brinell Hardness (HB)

≤ 197

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6 Cross References

14 Composition
41 Mechanical Properties
82 Physical Properties
1 Heat Treatment
- Metallography
- Machinability

1 Stress-Strain
- Formability
- Fatigue
- Fracture
50 Creep

83 Joints
- Coatings
4 Dimensions
1 Tribology

8491 Corrosion
- Ageing
- Weatherability
- Irradiation

2 Total Suppliers