630 (1.4542) Stainless Steel

630 (1.4542) is one of the newest stainless steel grade found in 1960s. This grade is a very special grade because of its mechanical properties. The yield and tensile strenght are both higher then 1000MPA nad if we compare this grade with the most famous grade 304, then we can understand how strong this grade is. In 304 grade, the yield is about 300MPA but in 630 (1.4542) the yield is over 1000MPA. If we again compare this grade with 304, the corrosion resistance level is nearly the same. So this grade has a good corrosion resistance and also has very high mechanical properties. This grade is in precipitation hardening stainless steel class and this is also called PH 17-4 or 17-4 PH. All 630 grade materials come to Bircelik as Condition A and all materials can be heat threated and harden more.



Grade Properties

General Properties Stars
Corrosion Resistance:
Mechanical Properties:





630 - PH 17.4 Grade Material Stock List (1.4542)

Material Shape Min Diameter (mm)

Max Diameter (mm)

Paslanmaz Çelik Çubuk 6 254
Material Shape Min Size (mm) Max Size (mm)
Flat Min Thickness: 25mm, max Thickness: 100mm Min Width: 50mm, max Width: 200mm
Square 30x30 60x60



Chemical Composition

Grade C Mn Si P S Cr Ni
630 (1.4542) %0.07max %1.0 %0.7 %0.4 %0.03max





Links About 630 Grade

UGIMA4542 (630) - UGITECH

UGIMA4542 (630) Productivity - UGITECH