310 Stainless Steel

310 Stainless Steel

Nickel (Ni) - 20.5 Median
(19.0 Min - 22.0 Max)
Chromium (Cr) - 25 Median
(24.0 Min - 26.0 Max)
Iron (Fe) - 50.675 Balance
Manganese (Mn) - 2.0 Max
Silicon (Si) - 1.50 Max
Other

Key

Nickel
Copper
Chromium
Aluminum
Molybdenum
Iron
Titanium
Manganese
Cobalt
Other
  • Nickel (Ni) 20.5 Median
    (19.0 Min - 22.0 Max)
  • Chromium (Cr) 25 Median
    (24.0 Min - 26.0 Max)
  • Iron (Fe) 50.675 Balance
  • Manganese (Mn) 2.0 Max
  • Carbon (C) 0.25 Max
  • Silicon (Si) 1.50 Max
  • Sulfur (S) 0.030 Max
  • Phosphorus (P) 0.045 Max

UNS S31000

As in-service temperature levels have been raised over time, the importance of 310 has increased. Chromium content contributes to heat resistance. However, straight chromium grade stainless steels (400 series) are only effective up to 1250º F (700º C). Austenitic grades, particularly 347 Stainless and 316 Stainless are used in environments up to 1600º F (850º C). 310 Stainless fasteners are used where temperatures may reach 2000º F (1100º C).

A .25% maximum carbon content is permissible in 310 Stainless. When carbon content is held under .08%, the material qualifies as 310S Stainless. In practice, most heat lots of 310 qualify as 310S.

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Summary

  • Environment:
    Oxidation Resistant
  • Temperature Limit:
    2000 °F / 1093 °C
  • Ultimate Tensile (Typical):
    80 ksi / 550 mpa

Specifications & Technical Data

If your question isn’t answered below, download the technical data sheet here.

Specifications

  • Plate, Sheet & Strip: ASTM A240
  • Rod & Bar: ASTM A479

Physical Properties

Typical (Room Temperature) Physical Properties of 310 Stainless
Density Specific Heat Electrical Resistivity Modulus of Elasticity Melting Range Thermal Conductivity
Imperial 0.285 Ibs/in3 0.12 BTU/lb-°F (32 – 212°F) 30.7 Microhm-in at 68°F 28.5 x 106 psi 2470 – 2555°F 8.0 BTU/hr/ft2/ft/°F
Metric 7.89 g/cm3 502 J/kg-°K (0 – 100°C) 78.0 Microhm-cm at 20°C 196 GPa 1354– 1402°C 10.8 W/m-°K

 

Physical Properties of 310 Stainless at High Temperatures
Temperature, °F  1000  1200  1400  1600  1800  2000
Coefficient* of Thermal Expansion,  in/in°F x 10-6 9.5 9.8 10.05 10.15 10.3 10.6
Thermal Conductivity, Btu • ft/ft2 • hr • °F 13.6 15.2 16.8 18.4 20.0
Modulus of Elasticity Dynamic,  psi x 106 23.0 21.8 20.5 19.2

 

Mechanical Properties

Typical (Room Temperature) Mechanical Properties of 310 Stainless
Yield Strength 0.2% Offset Ultimate Tensile Strength Elongation in 2 in. Hardness
psi (min.) (MPa) psi (min.) (MPa) % (min.) (max.)
35,000 245 80,000 550 45 217 Brinell

 

Representative Tensile Properties at High Temperatures
Temperature, °F  1000  1200  1400  1600
Ultimate Tensile Strength, ksi  67.8 54.1 35.1 19.1
0.2% Yield Strength, ksi  20.8 20.7 19.3 12.2
Elongation, %  47 43 46 48

 

 

Corrosion Resistance

High Temperature Corrosion
Environment Operating Temperature
Oxidizing conditions (max sulfur content – 2 g/m3) 1922°F (1050°C) continuous service
2012°F (1100°C) peak temperature
Oxidizing conditions (max sulfur greater than 2 g/m3) 1742°F (950°C) maximum temperature
Low oxygen atmosphere (max sulfur content – 2 g/m3) 1832°F (1000°C) maximum temperature
Nitriding or carburizing atmospheres 1562 – 1742°F (850 – 950°C) maximum

 

Creep Properties

Typical Creep Properties
Temperature
Creep Strain (MPa)
Creep Rupture (MPa)
°C
°F
1000 H
10000 H
100000 H
1000 H
10000 H
100000 H
600
1112
120
100
40
200
140
80
700
1292
50
35
20
80
45
20
800
1472
20
10
8
35
20
8
900
1652
10
6
3
15
10
5
1000
1832
5
3
1.5
9
4
2
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