310S
Chemical Composition %

AVAILABILITY
Seamless Pipe 1/2" - 8"
Weld Pipe 8" - 12"
Butt-Weld Fittings 1/2" - 8"
Bar 1" - 8"SPECIFICATIONS
ASTM A312, A403, A182
ASME SA312, SA403, SA182

DESCRIPTION
310S has excellent resistance to oxidation under constant temperatures to 2000 deg. F. Cyclic conditions reduce its oxidation resistance, and a maximum operating temperature of 1900 deg.F. is generally recommended if cycling is involved. Having a lower coefficient of expansion than most 300 stainless steels, 31OS may be used in operations involving moderately severe thermal cycling, such as rapid air cooling. It is not usually recommended for liquid quenching. Although 310S has less resistance to absorption of carbon and nitrogen than the higher alloys such as 330 and 333, it is widely used in moderately carburizing atmospheres such as encountered in petro-chem plants. Because of its high chromium and medium nickel contents, 310S may be used in atmospheres containing moderate amounts of sulfur.

DESIGN FEATURES
• Austenitic stainless steel with excellent high
temperature oxidation resistance.
• Good for continuous exposure to 2100 deg.F. intermittent service to 1900 deg.F.
• Better elevated temperature creep strength than the 18-8 grades.
• Good resistance to both carburizing and reducing environments.
• General corrosion resistance better than Types 304 and 309.
• May be susceptible to chloride stress corrosion cracking.
• Availability.
• Ease of fabrication.

TYPICAL APPLICATIONS
Heat exchanger and heat recuperator tubing
Molten salt applications
Sulfur bearing gas atmospheres

TENSILE REQUIREMENTS
Tensile Strength (KSI) 75
Yield Strength (KSI) 30

KSI can be converted to MPA (Megapascals) by multiplying by 6.895