24 July 2021 Precision Alloys
4J28 Precision Alloy Steel Bar
4J28 alloy has a coefficient of thermal expansion similar to soft glass in a certain temperature range, with good anti-corrosion performance. Mainly used in the vacuum industry and the corresponding soft glass sealing.
chemical composition(%):
Carbon C ≤ 0.12
Phosphorus P ≤ 0.02
Sulfur S ≤ 0.02
Mn Mn ≤ 1.00
Silicon Si ≤ 0.90
Chromium Cr 27.0 to 29.0
Molybdenum Mo
Nickel Ni ≤ 0.50