630 stainless steel is precipitation, hardened, martensitic stainless steel. 630 stainless steel is composed of copper, niobium precipitation, hardening, martensitic stainless steel.

Application areas:
Offshore platforms, helicopter decks, other platforms
food industry
Pulp and paper industry
Aerospace (turbine blades)
Mechanical components

Chemical composition / 630 stainless steel:
C Si Mn P
≤0.07 ≤1.00 ≤1.00 ≤0.035
S Ni Cr Mo
≤0.030 3.00-5.00 15.5-17.5 -
Cu Nb others
3.00-5.00 0.15-0.45 -

United States ASTMS17400, AISI630, UNS630 chemical composition:
C Si Mn P
≤0.07 ≤1.00 ≤1.00 ≤0.040
S Ni Cr Mo
≤0.030 3.00-5.00 15.5-17.5 -
Cu Nb others
3.00-5.00 0.15-0.45 -

Japan SUS630 chemical composition:
C Si Mn P
≤0.07 ≤1.00 ≤1.00 ≤0.040
S Ni Cr Mo
≤0.030 3.00-5.00 15.5-17.5 -
Cu Nb + Tao others
3.00-5.00 0.15-0.45 -

European X5CrNiCuNb16-4 chemical composition:
C Si Mn P
≤0.07 ≤1.00 ≤1.00 ≤0.040
S Ni Cr Mo
≤0.030 3.00-5.00 15.5-17.5 -
Cu Nb + Tao others
3.00-5.00 0.15-0.45 -

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