310 S Stainless Steel


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.

Inventory Spotlight: 310S

Type

Seamless & Welded Pipe

Butt Weld Fittings

Flanges & Pressure Fittings

Sizes

1/4″ thru 16″

1/2″ thru 12″

All descriptions

Schedules

Sch 10, 40, 80, 160, & XXH

Sch 10, 40, 80,160, & XXH

 

ASTM Standards

Bar

Butt Weld Fittings

Forgings

Pipe, Welded & Seamless

Tube, Welded

Tube, Seamless

Plate

A276, A479

A403

A182

A312

A249

A213

A240

Minimum Physical Properties

Tensile Strength

Yield Strength

75 KSI Min.

30 KSI Min.

Chemical Composition (wt%)

C

Mn

P

S

Si

Ni

Cr

Fe

Mo

0.04 – 0.08

2.00 Max

0.04 Max

0.03 Max

0.75 Max

19.0 – 22.0

24.0 – 26.0

Balance

0.75 Max