Acidur 4542 P930

Alternative and trade names
Acidur 4542, 1.4542, Type 630, SUS 630
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Description

Acidur 4542 (1.4542) is a hardenable stainless steel with high yield strength, high wear resistance and good corrosion resistance. As a remelted variant (ESU/VU) this steel is used in the aerospace industry. It is suitable for low temperatures and can be used up to approx. 315°C

Related Standards

Equivalent Materials

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.

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Properties

General

PropertyValue

Density

7.8 g/cm³

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Dimension

PropertyValueComment

Diameter

100 mm

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max.

Mechanical

PropertyTemperatureValueComment

Charpy impact energy, V-notch

40.0 J

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Elastic modulus

20 °C

200 GPa

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100 °C

195 GPa

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200 °C

185 GPa

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300 °C

175 GPa

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400 °C

170 GPa

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Hardness, Brinell

360.0

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annealed

Tensile strength

930.0 - 1100.0 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100 °C

0.0000109 1/K

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for 20°C to the mentioned temperature

200 °C

0.0000111 1/K

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for 20°C to the mentioned temperature

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Specific heat capacity

500.0 J/(kg·K)

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Thermal conductivity

16 W/(m·K)

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Electrical

PropertyValue

Electrical resistivity

7.1e-07 Ω·m

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Chemical properties

PropertyValueComment

Carbon

0.07

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Chromium

15.0 - 17.0 %

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Copper

3.0 - 5.0 %

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Manganese

1.0

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Molybdenum

0.6000000000000001

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Nickel

3.0 - 5.0 %

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Other

0.15

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0.45

Phosphorus

0.04

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Silicon

0.7000000000000001

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Sulfur

0.03

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Technological properties

Property
Application areas

Aerospace, Plant engineering and construction, Chemical industry, Wood industry, Mechanical engineering, Oil industry, Paper industry, Sports and leisure industry, Ship building

Corrosion properties

The good combination of high corrosion resistance and good mechanical properties makes Acidur 4542 suitable for use in marine environments. In standing seawater, however, Acidur 4542 is susceptible to crevice corrosion. If application in standing seawater cannot be excluded, additional protection (e.g. painting) must be applied.

General machinability

Acidur 4542 can be machined in both the solution annealed and hardened condition. The machinability of Acidur 4542 depends on the hardness

Heat Treatment

Hardening:1030-1055°C in oil, air - Percipitation hardening: 4 hr 620°C in air

Hot forming

It is formable at 900-1150°C

Processing history

Percipitation hardened P930

Welding

To weld Acidur 4542, the condition of the base material must be taken into account. The copper is present in the material in a stable form and therefore does not promote hot cracking. In addition to setting 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.