Stainless Steel
Superaustenitic INCOLOY® 27-7MO®

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Specifications (ASTM/ASME)
Alloy UNS Designation Material
Specification
Tubing
Specification
Pipe
Specification
27-7MO® S31277 A 240/SA-240 A 249/SA-249 A 312/SA-312
Chemical Composition (%)
Alloy 27-7MO®
UNS Designation S31277
Carbon (C) max. 0.020
Manganese (Mn) max. 3.00
Phosphorus (P) max. 0.030
Sulfur (S) max. 0.010
Silicon (Si) max. 0.50
Chromium (Cr) 20.5 - 23.0
Nickel (Ni) 26.0 - 28.0
Molybdenum (Mo) 6.5 - 8.0
Nitrogen (N) 0.30 - 0.40
Copper (Cu) 0.50 - 1.50
Iron (Fe) Balance
Typical Physical & Mechanical Properties - Annealed Condition (Room Temperature)
Alloy UNS Designation Minimum Tensile Strength
Minimum Yield
Strength
0.2% Offset
Minimum Percent (%)
Elongation in
2 inches (50.8 mm)
(psi) (MPa) (psi) (MPa)
27-7MO® S31277 112,000 770 52,000 360 40

INCOLOY® 27-7MO® is a registered trademark of Special Metals Corporation group of companies.

 

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Not all products are produced by Johnson Tube Company™, a division of Johnson International Industries, Inc., but all products meet or exceed stated specifications.