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
See where Acidur 4542 P930 Bar falls on the material property chart for Density against Elastic modulus in your materials selection and design process. Our Ashby charts are interactive with more technical data upon clicking. Sign up to get access to this premium feature for free.
7.8 g/cm³ at 23 °C
Coefficient of thermal expansionα
1.09E-5 1/K at 100 °C
for 20°C to the mentioned temperature
Specific heat capacitycp
500 J/(kg·K) at 23 °C
16 W/(m·K) at 23 °C
7.1E-7 Ω·m at 23 °C
15 - 17 %
3 - 5 %
3 - 5 %
Aerospace, Plant engineering and construction, Chemical industry, Wood industry, Mechanical engineering, Oil industry, Paper industry, Sports and leisure industry, Ship building
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.
Acidur 4542 can be machined in both the solution annealed and hardened condition. The machinability of Acidur 4542 depends on the hardness
Hardening:1030-1055°C in oil, air - Percipitation hardening: 4 hr 620°C in air
It is formable at 900-1150°C
Percipitation hardened P930
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.
This material data has been provided by Deutsche Edelstahlwerke Specialty Steel (DEW).