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EN 10222-4 Grade P355QH1 Quenched & Tempered Steel – Superior Strength & Weldability

Steel P355QH is a tempered weldable fine grained steel with a yield strength of max. 355 N/mm². Application: pressure vessel construction, apparatus engineering, general machine and toolbuilding.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.83 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

20.0 °C

19 - 23 %

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

470 - 630 MPa

Yield strength

20.0 °C

275 - 355 MPa

200.0 °C

255 MPa

250.0 °C

235 MPa

300.0 °C

216 MPa

350.0 °C

196 MPa

400.0 °C

167 MPa

Yield strength Rp0.2

20.0 °C

265 - 305 MPa

50.0 °C

266 - 305 MPa

100.0 °C

235 - 304 MPa

150.0 °C

215 - 284 MPa

200.0 °C

197 - 255 MPa

250.0 °C

179 - 235 MPa

300.0 °C

160 - 216 MPa

350.0 °C

142 - 196 MPa

400.0 °C

117 - 179 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.08E-5 1/K

20.0 °C

1.19E-5 1/K

100.0 °C

1.25E-5 1/K

200.0 °C

1.3E-5 1/K

300.0 °C

1.36E-5 1/K

400.0 °C

1.41E-5 1/K

500.0 °C

1.45E-5 1/K

600.0 °C

1.49E-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

37.6 W/(m·K)

20.0 °C

42.2 W/(m·K)

100.0 °C

43.2 W/(m·K)

200.0 °C

42.9 W/(m·K)

300.0 °C

41.2 W/(m·K)

400.0 °C

39.1 W/(m·K)

500.0 °C

36.6 W/(m·K)

600.0 °C

34.1 W/(m·K)

Thermal diffusivity

-100.0 °C

12.9 mm²/s

20.0 °C

11.7 mm²/s

100.0 °C

11.2 mm²/s

200.0 °C

10.3 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

5.7 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

-100.0 °C

1.82E-7 Ω·m

20.0 °C

2.47E-7 Ω·m

100.0 °C

2.96E-7 Ω·m

200.0 °C

3.68E-7 Ω·m

300.0 °C

4.55E-7 Ω·m

400.0 °C

5.56E-7 Ω·m

500.0 °C

6.75E-7 Ω·m

600.0 °C

8.13E-7 Ω·m

Magnetic

PropertyValueComment

Curie temperature

770 °C

Typical for Low Carbon Steel

Chemical properties

PropertyValue

Aluminium

0.02 - 0.06 %

Carbon

0.18 - 0.2 %

Chromium

0.3 %

Copper

0.2 - 0.3 %

Manganese

0.9 - 1.65 %

Molybdenum

0.08 - 0.25 %

Nickel

0.3 - 0.5 %

Niobium

0.05 %

Nitrogen

0.02 %

Phosphorus

0.03 %

Silicon

0.1 - 0.5 %

Sulfur

0.01 - 0.015 %

Vanadium

0.1 %


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