Stainless Steel Plate

A Multi-Purpose Austenitic Heat Resistant Stainless Steel with Oxidation Resistance Under Mildly Cyclic Conditions to 2010°F (1100°C).

Available thicknesses for Alloy 310/310S/310H:

3/16" 1/4" 5/16" 3/8" 1/2" 5/8" 3/4" 1"
4.8mm 6.3mm 7.9mm 9.5mm 12.7mm 15.9mm 19mm 25.4mm
1 1/4" 1 1/2" 1 3/4" 2" 2 1/4" 2 1/2" 3"
31.8mm 38.1mm 44.5mm 50.8mm 57.2mm 63.5mm 76.2mm

General Properties

Alloy 310 (UNS S31000) is an austenitic stainless steel developed for use in high temperature corrosion resistant applications. The alloy resists oxidation up to 2010oF (1100oC) under mildly cyclic conditions.

Because of its high chromium and moderate nickel content, Alloy 310 is resistant to sulfidation and can also be used in moderately carburizing atmospheres.

The more severe carburizing atmospheres of thermal process equipment usually require nickel alloys such as 330 (UNS N08330). Alloy 310 can be utilized in slightly oxidizing, nitriding, cementing and thermal cycling applications, albeit, the maximum service temperature must be reduced. Alloy 310 also finds usage in cryogenic applications with low magnetic permeability and toughness down to -450oF (-268oC). When heated between 1202 – 1742oF (650 – 950oC) the alloy is subject to sigma phase precipitation. A solution annealing treatment at 2012 – 2102oF (1100 – 1150oC) will restore a degree of toughness.

310S (UNS S31008) is the low carbon version of the alloy. It is utilized for ease of fabrication. 310H (UNS S31009) is a high carbon modification developed for enhanced creep resistance. In most instances the grain size and carbon content of the plate can meet both the 310S and 310H requirements.

Alloy 310 can be easily welded and processed by standard shop fabrication practices.


  • Cryogenic Components
  • Food Processing
  • Furnaces – burners, doors, fans, piping and recuperators
  • Fluidized Bed Furnaces – coal combustors, grids, piping, wind boxes
  • Ore Processing/Steel Plants – smelter and steel melting equipment, continuous casting equipment
  • Petroleum Refining – catalytic recovery systems, flares, recuperators, tube hangers
  • Power Generation – coal gasifier internals, pulverized coal burners, tube hangers
  • Sintering/Cement Plants – burners, burner shields, feeding and discharging systems, wind boxes
  • Thermal Processing – annealing covers and boxes, burner grids, doors, fans, muffles and retorts, recuperators, walking beams


ASTM........A 240
ASME........SA 240

Corrosion Resistance

Wet Corrosion
Alloy 310 is not designed for service in wet corrosive environments. The high carbon content, which is present to enhance creep properties, has a detrimental effect on aqueous corrosion resistance. The alloy is prone to intergranular corrosion after long term exposure at high temperatures. However, due to its high chromium content (25%), Alloy 310 is more corrosion resistant than most heat resistant alloys.

High Temperature Corrosion
The high chromium (25%) and silicon (0.6%) content of Alloy 310 make it more resistant to high temperature corrosion in most in-service environments. Operating temperatures are listed below.

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

The alloy does not perform as well as Alloy 600 (UNS N06600) or Alloy 800 (UNS N08800) in reducing, nitriding or carburizing atmospheres, but it does outperform most heat resistant stainless steels in these conditions.

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

Chemical Analysis

Weight % (all values are maximum unless a range is otherwise indicated)

Element 310 310S 310H
Chromium 24.0 min.-26.0 max. 24.0 min.-26.0 max. 24.0 min.-26.0 max.
Nickel 19.0 min.-22.0 max. 19.0 min.-22.0 max. 19.0 min.-22.0 max.
Carbon 0.25 0.08 0.40 min. - 0.10 max.
Manganese 2.00 2.00 2.00
Phosphorus 0.045 0.045 0.045
Sulfer 0.030 0.030 0.030
Silicon 1.50 1.50 0.75
Iron Balance Balance Balance

Physical Properties


0.285 lbs/in3
7.89 g/cm3

Specific Heat

0.12 BTU/lb-°F (32 – 212°F)
502 J/kg-°K (0 – 100°C)

Modulus of Elasticity

28.5 x 106 psi
196 GPa


Thermal Conductivity 212°F (100°C)

8.0 BTU/hr/ft2/ft/°F
10.8 W/m-°K

Melting Range

2470 – 2555°F
1354 – 1402°C

Electrical Resistivity

30.7 Microhm-in at 68°C
78.0 Microhm-cm at 20°C

Mechanical Properties

Typical Values at 68°F (20°C)

Yield Strength
0.2% Offset
Ultimate Tensile
in 2 in.
psi (min.) (MPa) psi (min.) (MPa) % (min.) (max.)
35,000 245 80,000 550 45 217 Brinell

Fabrication Data

Alloy 310 can be easily welded and processed by standard shop fabrication practices.

Hot Forming

Heat uniformly at 1742 – 2192°F (950 – 1200°C). After hot forming a final anneal at 1832 – 2101°F (1000 – 1150°C) followed by rapid quenching is recommended.

Cold Forming

The alloy is quite ductile and forms in a manner very similar to 316. Cold forming of pieces with long-term exposure to high temperatures is not recommended since the alloy is subject to carbide precipitation and sigma phase precipitants.


Alloy 310 can be readily welded by most standard processes including TIG, PLASMA, MIG, SMAW, SAW and FCAW.

NOTE: The information and data in this product data sheet are accurate to the best of our knowledge and belief, but are intended for informational purposes only, and may be revised at any time without notice. Applications suggested for the materials are described only to help readers make their own evaluations and decisions, and are neither guarantees nor to be construed as express or implied warranties of suitability for these or other applications.

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