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15-7 Mo is a semi-austenitic precipitation-hardening stainless steel. It is known for its high strength, hardness and corrosion resistance. It can be easily formed in the annealed condition.

Component Elements Properties Percent
Carbon (maximum) .09%
Manganese (maximum) 1%
Phosphorus (maximum) .04%
Sulfur (maximum) .04%
Silicon (maximum) 1%
Chromium 14 – 16%
Nickel 6.5 – 7.75%
Molybdenum 2 – 3%
Aluminum .75 – 1.5%

Mechanical Properties, Solution Heat Treated

Nominal Thickness Inches Tensile Strength ksi, max Yield Strength at 0.2% Offset ksi, max Elongation In 2 Inches or 4D %, min
0.0015 to 0.005, excl 165 — 15
0.005 and over 150 65 25

Select AMS Number:

AMS Number Alloy Type UNS Cross Ref. Spec Misc./Shape
AMS 5520 PH 15-7 Mo Stainless Steel S15700  
AMS 5520 Foil PH 15-7 Mo Stainless Steel S15700 - Foil AMS 5520 Foil
AMS 5520 Plate PH 15-7 Mo Stainless Steel S15700 - Plate AMS 5520 Plate
AMS 5520 Sheet PH 15-7 Mo Stainless Steel S15700 - Sheet AMS 5520 Sheet
AMS 5520 Strip PH 15-7 Mo Stainless Steel S15700 - Strip AMS 5520 Strip
AMS 5657 PH 15-7 Mo Stainless Steel S15700  
AMS 5657 Bar PH 15-7 Mo Stainless Steel S15700 - Bar AMS 5657 Bar
AMS 5657 Extrusion PH 15-7 Mo Stainless Steel S15700 - Extrusion AMS 5657 Extrusion
AMS 5657 Forging PH 15-7 Mo Stainless Steel S15700 - Forging AMS 5657 Forging
AMS 5657 Ring PH 15-7 Mo Stainless Steel S15700 - Ring AMS 5657 Ring
AMS 5657 Wire PH 15-7 Mo Stainless Steel S15700 - Wire AMS 5657 Wire