# PH 15-7 Mo Stainless Steel Properties

PH 15-7 Mo Stainless Steel is a semi-austenitic precipitation-hardening stainless steel that provides high strength and hardness, good corrosion resistance and minimum distortion on heat treatment. It is easily formed in the annealed condition and develops an effective balance of properties by simple aging heat treatments. In the heat-treated condition, Type 15-7 PH provides excellent mechanical properties at temperatures up to 900°F (482°C). Its corrosion resistance is superior to that of the hardenable straight chromium types. In some environments, corrosion resistance approximates that of the austenitic chromium-nickel stainless steels. 15-7 is weldable by common fusion and resistance methods; however, this particular alloy is generally considered to have poorer weldability compared to more common PH grades (17-4 PH) due to the high Al content of this alloy, which degrades penetration and enhances weld slag formation during arc welding.

# PH 15-7 Mo Stainless Steel Standard Stock Specifications

► AMS 5520 ► MIL-S-8955 ► AISI 632
► ASTM A693 Grade 632 ► UNS S15700

# PH 15-7 Mo Stainless Steel Mechanical Properties:

* Condition: Annealed (A)
Tensile Strength Minimum (psi): 130,000
Yield Strength Minimum 0.2% offset (psi): 55,000
% Elongation in 2” Typical: 35%
Hardness: Rockwell B88

* Condition: Hardened + Aged (TH1050)
Tensile Strength Typical (psi): 210,000
Yield Strength Typical 2% offset (psi): 200,000
% Elongation in 2": 7%
Hardness: Rockwell C44

* Condition: Hardened, Cryogenic Quench + Aged (RH950)
Tensile Strength Typical (psi): 240,000
Yield Strength Typical 2% offset (psi): 225,000
% Elongation in 2": 6%
Hardness: Rockwell C48

* Condition: Cold Rolled/Worked + Aged (CH900)
Tensile Strength Typical (psi): 265,000
Yield Strength Typical 2% offset (psi): 260,000
% Elongation in 2": 2%
Hardness: Rockwell C50