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Acidur 4542

Alternative and trade names
1.4542, Type 630, SUS 630
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Description

Acidur 4542 is a hardenable stainless steel with high yield strength, high wear resistance and corrosion resistance. As a remelted variant (ERU/VAR) this steel is used in the aerospace industry.

Properties

Electrical

Electrical resistivity ρel

7.1E-7 Ω·m at 20 °C

General

Density ρ

7.8 g/cm³ at 20 °C

Mechanical

Elastic modulus E

200 GPa at 20 °C

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Hardness, Rockwell C HRC

38 [-] at 20 °C

max

Tensile strength Rm

1200 MPa at 20 °C

max

Thermal

Coefficient of thermal expansion α

1.09E-5 1/K at 100 °C

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Specific heat capacity cp

500 J/(kg·K) at 20 °C

Thermal conductivity λ

16 W/(m·K) at 20 °C

Chemical properties

Element

Weight %

Comment

Fe

-

balance

Nb

-

5C

Cr

15 - 17 %

Ni

3 - 5 %

Cu

3 - 5 %

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Technological properties

Application areas

Aerospace, plant construction, chemical industry, wood industry, mechanical engineering, petroleum industry, paper industry, sports industry, shipbuilding industry

Corrosion properties

(PREN = 15.0 - 18.9) Thanks to the good combination of high corrosion resistance and good mechanical properties, 1.4542 is suitable for use in maritime environments. In standing seawater, however, 1.4542 is susceptible to crevice corrosion. If the application in standing seawater cannot be excluded, an additional protection (e.g. paint) must be applied.

General machinability

1.4542 can be machined in solution annealed and hardened condition. The machinability of 1.4542 depends on the hardness.

Welding

To weld 1.4542, the condition of the base material must be taken into account. The copper in the material is present in a stabelized form and therefore does not promote a tendency to hot cracking. In addition to setting of optimum welding conditions, care must be taken to avoid undercuts or other welding defects that lead to the formation of a notch. After welding, the material must be solution annealed again within a very short time with subsequent ageing to prevent stress cracking.

This material data has been provided by Deutsche Edelstahlwerke Specialty Steel (DEW).

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.