Type 310S (UNS S31008) in Coil Form


Type 310S is a high temperature chromium nickel austenitic stainless steel with high creep strength that resists oxidation at temperatures up to 2000˚F in dry air. Type 310S forms a tenacious scale at high temperature and is resistant to spalling and performs better than Type 309 in thermal cycling applications. Type 310 has good sulfidation resistance and good resistance to carburization in moderately carburizing atmospheres. Type 310S is the low carbon version of Type 310 and is utilized for ease of fabrication due to its better formability and weldability. Type 310S is non-magnetic in the annealed and cold worked conditions and is as resistant to corrosion as Type 304/304L.

Chemical Composition
Chemical Composition (wt%) limits as specified in ASTM A240 and ASME SA240*.

Element 310S
Carbon 0.08
Chromium 24.0-26.0
Nickel 19.0-22.0
Manganese 2.00
Silicon 1.50
Phosphorus 0.045
Sulfur 0.030
* Maximum, unless range is indicated

Mechanical Properties
Mechanical property requirements for annealed product as specified in ASTM A240 and ASME SA240.

Property 310S
Yield Strength, min. (ksi) 30
Tensile Strength, min. (ksi) 75
Elongation, min. (%) 40
Hardness, max. (Rb) 95

Physical Properties
Physical properties for Type 310S stainless steel

Property 310S
Density, lb/in3 0.290
Modulus of Elasticity, psi 29.0 x 106
Coefficient of Thermal Expansion, 68-212˚F, /˚F 8.8 x 10-6
Thermal Conductivity, Btu/ft hr ˚F 8.0
Specific Heat, Btu/lb ˚F 0.12
Electrical Resistivity, Microohm-in 30.7

Typical standards for Type 310S stainless steel

AMS 5521

Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. © 2014 RMP Inc. All rights reserved.

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