17-7PH is an austenitic-martensitic precipitation hardening stainless steel developed on the basis of 18-8CrNi, also known as controlled phase change stainless steel.
After solution treatment, it becomes unstable austenite structure with good plastic toughness and workability. After adjustment, the austenite precipitates and carbides are changed. After martensite transformation treatment, most of the structure is transformed into toughness Good low-carbon tempered martensite, this state is the state of use of steel, and has good mechanical properties at medium temperature. Corrosion resistance is better than general martensitic stainless steel.
C:≤0.09
Si:≤1.00
Mn: ≤1.00
P:≤0.040
S:≤0.040
Ni:6.50~7.75
Cr:16.00~18.00
Mo:-
Cu:-
N:-
Al:0.75~1.50
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