310 stainless steel is an austenitic stainless steel developed for use in high temperature corrosion resistant applications. Typically used in coal combustors, radiator tubes, steam boilers, thermowells, burners, combustion chambers, food processing equipment, and cryogenic hardware. 310S is the low carbon version of the stainless steel. It is utilized for ease of fabrication.

Alloy Designations of 310/310s Stainless Steel

Stainless steel 310 approximate comparison table:

20Cr25Ni20 S31020 SUH 310 SUH 310 STR 310 310 S31000 X15CrNi 25-21 X15CrNiSi 25-20 1.4841 Z15CNS 25-20 X15CrNi 25-20 1.4845 20Х25Н20С2 310S31

Stainless steel 310s approximate comparison table:

1Cr25Ni20Si2 SUS310S 310S S31008 H16 X8CrNi25-21 Z8CN25-20 X8CrNi25-21 1.4845 10KH23N18 2361 310S16
20KH23N18 310S24

Chemical Composition of 310/310s Stainless Steel

Type 310/310s Stainless Steel Chemical Composition
Grades uns Element C Si Mn P S Cr Ni
310S (0Cr25Ni20) S31008 Min - - - - - 24 19
Max 0.08 1 2 0.045 0.03 26 22
310 S31000 Min - - - - - 24 19
Max 0.25 1.5 2 0.045 0.03 26 22

Mechanical Properties of 310/310s Stainless Steel

Tensile Strength


Yield Strength




Toughness Density Melting Point
≥515-1035 ≥205 ≥40 ≤210 7.93 1398~1454

Popular Finish Options of 310/310s Stainless Steel

A comprehensive collection of finishes is also available from QINGHE STEEL when purchasing stainless steel plate. Popular finish options include:

  • Also cold-rolled, the 2D finish has a matte surface with low reflectivity.
  • HR / No.1 . This hot-rolled finish has a scaled appearance and so is ideal where the final aesthetic is not an important concern.
  • BA / 2R. Cold rolled and annealed in a controlled atmosphere to retain a highly reflective finish. This highly-reflective finish is achieved by annealing the alloy in a carefully controlled atmosphere.
  • Smooth finish, reflective grey sheen. Most widely used surface finish. The most popular surface finish, 2B offers a smooth appearance with a grey, reflective sheen.


Machinability Grades 310/310S stainless steel are similar in machinability to type 304. Work hardening can be a problem and it is normal to remove the work hardened layer by using slow speeds and heavy cuts, with sharp tools and good lubrication. Powerful machines and heavy, rigid tools are used.

Welding of Stainless Steel 310/310s

Welding Grades 310/310S are welded with matching electrodes and filler metals. The alloys are readily welded by SMAW (manual), GMAW (MIG), GTAW (TIG) and SAW. Electrodes to AWS A5.4 E310-XX and A 5.22 E310T-X, and filler metal AWS A5.9 ER310 are used. Argon is shielding gas. Preheat and post heat are not required, but for corrosion service in liquids full post weld solution annealing treatment is essential. Pickling and passivation of the surface to remove high temperature oxides are essential to restore full aqueous corrosion resistance after welding. This treatment is not required for high temperature service, but welding slag should be thoroughly removed.

Applications of 310/310s Stainless Steel

  • 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

What Stainless Steel Grades We Have!

Qinghe Steel is a full line supplier and processer of stainless steel coil, sheet, plate, bar, and strip products. We stock many grades of stainless steel, including 300 and 400 series stainless, annealed and in various tempers and high temperature grades, for shipments worldwide. View our steel center here

Qinghe Steel stocks a wide range of stainless steel sizes for your specific project needs. We offer quick delivery throughout the world. Contact us today to discuss stainless steel for your project needs.


What forms of 310/310S Stainless Steel are available?

  • Sheet
  • Plate
  • Bar
  • Pipe & Tube
  • Fittings
    • Elbows, tees, stub-ends, returns, caps, crosses, reducers, pipe nipples, etc.
  • Weld Wire (AWS E310-16 or ER310)

What are the characteristics of 310/310S Stainless?

  • Oxidation resistance to 2000°F
  • Moderate strength at high temperature
  • Resistance to hot corrosion
  • Strength and toughness at cryogenic temperatures

Can 310 and 310s stainless steel plate be polished?

Yes, 310 and 310S can be polished to a wide variety of finishes.

Can 310 and 310s be multi-certified?

It is possible to multi-certify 310 and 310s stainless steel plate, however, it does depend on the chemical, mechanical and physical properties of the stainless steel plate to be certain.

Can 310 and 310s stainless steel plate be heat treated?

Heat treating these grades of stainless steel plate do not result in a stronger, more durable product.