GB S30408 Stainless steels

Material group: Ferrous Alloys / Stainless steels

Country/Standard: China / GB

Data updates

Latest Update: 2026-02

Total number of updates: 42

Update History

2026-01 2025-12 2025-11 2025-10 2025-09 2024-11 2024-10 2024-04 2024-03 2022-12 2022-11 2022-09 2022-05 2022-02 2021-11 2021-03 2021-02 2020-11 2020-03 2020-02 2020-01 2019-10 2019-05 2018-11 2018-07 2018-06 2018-02 2018-01 2017-12 2017-11 2017-05 2017-03 2017-01 2016-12 2016-09 2016-08 2016-05 2015-10 2015-07 2014-11 2014-10

This material has 2292 properties — only a subset is shown here.

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GB S30408 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.08

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

18.00 – 20.00

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

≤ 2.00

UNIT

CAS NUMBER

7439-96-5

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

GB/T 1220: 2007 / Stainless steel bars

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GB S30408 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

val1 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

15 — 16.7 W/(m∙°C)

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Heat Capacity

val1 J/(kg∙°C)

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Electrical Resistivity

0.73 — 0.8 Ω∙mm²/m

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Electrical Conductivity

val1 S/m

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Service Temperature

val1 °C

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This material has 2292 properties — only a subset is shown here.

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GB S30408 Heat Treatments

1010 - 1150°C, fast cold
Full thread studs and hexagon nuts are solid solution treated.

GB S30408 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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Yield Strength, Rp1

val1 MPa

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Tensile Strength

val1 MPa

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Elongation, A

val1 %

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Reduction of Area

val1 %

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Impact Energy

val1 J

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Brinell Hardness (HB)

187

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Rockwell Hardness (HR)

val1

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Vickers Hardness (HV)

val1

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Grain Size

val1

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724 Cross References

375 Composition
458 Mechanical Properties
105 Physical Properties
30 Heat Treatment
- Metallography
- Machinability

57 Stress-Strain
2 Formability
- Fatigue
- Fracture
206 Creep

- Joints
- Coatings
89 Dimensions
- Tribology

- Corrosion
- Ageing
- Weatherability
- Irradiation

246 Total Suppliers