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EN 10268 H320LA Steel – Certified High‑Tensile, Lightweight, and Formable

H320LA, mat. No. 1.0548, is a micro alloyed steel with a min. yield strength of 320 N/mm² and a min. ultimate strain of 22 %. The material is well cold formable. The mandrel diameter at bending test min. 180° amounts to 0e for transverse test specimen (e= nominal thickness). Thin sheets made of micro alloyed high-tensile steel allow for a steel thickness reduction and therewith a building weight reduction for special application purposes. Application: car manufacturing, construction trade, household appliances industry, plant construction etc. The material is suitable for metallization by hot-dip coating, application of electrolytic coatings and/or of organic or other coating. Welding: The material is suitable for: - MAG (metal-active-gas) - plasma welding - laser welding - compression weld welding - resistance welding (spot, roll weld, buckle welding) - arc hand welding

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.84 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

-100.0 °C

217 GPa

20.0 °C

212 GPa

100.0 °C

207 GPa

200.0 °C

199 GPa

300.0 °C

192 GPa

400.0 °C

184 GPa

500.0 °C

175 GPa

600.0 °C

164 GPa

Elongation A80

20.0 °C

22 %

Poisson's ratio

23.0 °C

0.29 [-]

Typical for Low Carbon Steel

Shear modulus

23.0 °C

82 GPa

Typical for Low Carbon Steel

Tensile strength

20.0 °C

400 MPa

Yield strength

20.0 °C

320 - 410 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.05E-5 1/K

20.0 °C

1.15E-5 1/K

100.0 °C

1.21E-5 1/K

200.0 °C

1.27E-5 1/K

300.0 °C

1.32E-5 1/K

400.0 °C

1.36E-5 1/K

500.0 °C

1.4E-5 1/K

600.0 °C

1.44E-5 1/K

Max service temperature

500 °C

Typical for Carbon Steel

Melting point

1480 - 1526 °C

Typical for Low Carbon Steel

Specific heat capacity

-100.0 °C

423 J/(kg·K)

20.0 °C

461 J/(kg·K)

100.0 °C

479 J/(kg·K)

200.0 °C

499 J/(kg·K)

300.0 °C

517 J/(kg·K)

400.0 °C

536 J/(kg·K)

500.0 °C

558 J/(kg·K)

600.0 °C

587 J/(kg·K)

Thermal conductivity

-100.0 °C

36.6 W/(m·K)

20.0 °C

41.5 W/(m·K)

100.0 °C

42.5 W/(m·K)

200.0 °C

42.5 W/(m·K)

300.0 °C

41.2 W/(m·K)

400.0 °C

39.3 W/(m·K)

500.0 °C

37.1 W/(m·K)

600.0 °C

34.5 W/(m·K)

Thermal diffusivity

-100.0 °C

12.5 mm²/s

20.0 °C

11.5 mm²/s

100.0 °C

11.2 mm²/s

200.0 °C

10.2 mm²/s

300.0 °C

9.4 mm²/s

400.0 °C

8.3 mm²/s

500.0 °C

7.1 mm²/s

600.0 °C

5.8 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

-100.0 °C

1.87E-7 Ω·m

20.0 °C

2.51E-7 Ω·m

100.0 °C

3.01E-7 Ω·m

200.0 °C

3.71E-7 Ω·m

300.0 °C

4.55E-7 Ω·m

400.0 °C

5.53E-7 Ω·m

500.0 °C

6.67E-7 Ω·m

600.0 °C

8.03E-7 Ω·m

Magnetic

PropertyValueComment

Curie temperature

770 °C

Typical for Low Carbon Steel

Chemical properties

PropertyValue

Aluminium

0.015 %

Carbon

0.1 %

Manganese

1 %

Niobium

0.09 %

Phosphorus

0.03 %

Silicon

0.5 %

Sulfur

0.025 %

Titanium

0.15 %


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