17-7PH is an austenitic-martensitic precipitation hardening stainless steel developed on the basis of 18-8CrNi, also known as controlled phase transformation stainless steel.
After solution treatment, it is an unstable austenite structure with good plastic toughness and workability. After adjustment, the austenite precipitation carbide climatic composition changes, and then after martensitic transformation treatment, most of the structure is transformed into toughness. Better low-carbon tempered martensite, this state is the use state of steel, and has good mechanical properties at medium temperature. Corrosion resistance is better than general martensitic stainless steel.
Chemical Composition:
Carbon (C)≤0.09,
Manganese (Mn)≤1.00,
Nickel (Ni) 6.50~7.75,
Silicon (Si)≤1.00,
Phosphorus (P)≤0.035,
Sulfur (S)≤0.030,
Chromium (Cr) 16.00~ 18.00,
aluminum (Al) 0.75~1.50
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