Stainless Steel 310/310S (UNS S31000/UNS S31008) – Austenitic Heat Resistant Alloy

wilsonpipeline Pipe Industry Co., Limited is a leading manufacturer and supplier of nickel alloy and stainless steel products, including Super Duplex Stainless Steel Flanges, Stainless Steel Flanges, Stainless Steel Pipe Fittings, Stainless Steel Pipe. Stainless steel 310/310S is an austenitic heat resistant alloy having high resistance to oxidation under mildly cyclic conditions through 2000ºF. 

This steel has a high nickel and chromium content that offers comparable corrosion resistance, high resistance to oxidation and retention of larger fraction of room temperature strength than the common austenitic alloys like Type 304. Stainless 310 is often used at cryogenic temperatures, with excellent toughness to -450°F, and low magnetic permeability.

Chemical Composition

310 UNS S31000 Chemical Composition, %

The chemical composition of 310UNS S31000 is:CrNiCSiMnPSMoCuFe24.0-26.019.2-22.0.25 Max1.50 Max2.00 Max.045 Max.03 Max.75 Max.50 MaxBalance

310S UNS S31008 Chemical Composition, %CrNiCSiMnPSMoCuFe24.0-26.019.2-22.0.08 Max1.50 Max2.00 Max.045 Max.03 Max.75 Max.50 MaxBalance

Forms of 310/310S Stainless Steel

The forms of 310/310S stainless steel are:

1. Plate

2. Bar

3. Stainless Steel Pipe & Tube

4. Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lap joints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples)

5. Sheet

6. Weld Wire.

Properties of 310/310S Stainless Steel

The properties of 310/310S stainless steel are:

1. Oxidation resistance to 2000°F

2. Moderate strength at high temperature

3. Resistance to hot corrosion

4. Strength and toughness at cryogenic temperatures.

Mechanical Properties

Representative Tensile Properties

Temperature, 

°FUltimate Tensile Strength, ksi.2% Yield Strength, ksiElongation Percent7080.035.052100067.820.847120054.120.743140035.119.346160019.112.248

Typical Creep-Rupture PropertiesTemperature, °FMinimum Creep 0.0001%/hr, ksi100,000 Hour Rupture Strength, ksi1200014.914.414003.34.516001.11.51800.28.66

Fabrication with Stainless Steel 310/310S

Type 310/310S is readily fabricated by standard commercial procedures. In comparison to carbon steel, stainless steels are tougher and tend to work harden rapidly. Type 310/310S can be welded using all of the common welding processes.

Typical Applications for 310/310S Stainless Steel

The applications of 310/310S stainless steel are:

1. Kilns

2. Heat exchangers

3. Furnace parts, conveyor belts, rollers, oven linings, fans

4. Food processing equipment

5. Cryogenic structures

6. Stainless Steel U Tube

7. Muffles, retorts, annealing covers

8. Tube hangers for petroleum refiing and steam boilers

9. Coal gasifier internal components

10. Saggers.

This information has been sourced, reviewed and adapted from materials provided by wilsonpipeline Pipe Industry Co., Limited.

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