310

310

Excellent resistance to oxidation under mildly cyclic conditions through 2000°F characterizes 310. Because of its high chromium and medium nickel contents, 310 has good resistance to sulfidation and other forms of hot corrosion. 310 is widely used in moderately carburizing atmospheres such as encountered in petrochemical environments. The more severely carburizing atmospheres of industrial heat treating furnaces require RA330® or RA333®. 310 is not suggested for the severe thermal shock of repeated liquid quenching.

Often in many product forms, the grain size and carbon content can meet both the 310S and 310H requirements. 310 is often used at cryogenic temperatures, with excellent toughness to -450°F, and low magnetic permeability. 310 has a machinability rating of 42% relative to AISI B1112 steel. When using high speed steel tooling, this equates to about 70 surface feet per minute. Forming operations should be performed at room temperature whenever possible. Welding with AWS E310-15 electrodes or ER310 bare wire is suggested.

Chemistry

 CrNiCSiMnPSMoCuFe
MIN 24.0 19.0 - - - - - - - -
MAX 26.0 22.0 0.08 0.75* 2.0 0.045 0.03 0.75 0.5 Balance

* ASTM specification 1.50 max Si.

Specifications

AMS 5521AMS 5651
ASME SA 240ASME SA 312ASME SA 479
ASTM A 240ASTM A 276ASTM A 276 Condition AASTM A 276 Condition SASTM A 312ASTM A 479
EN 10095
UNS S31008UNS S31009
Werkstoff 1.4845

Inventory

310 Coil, 310 Pipe, 310 Plate, 310 Rod Coil, 310 Sheet, 310 Tubing, 310 Welding Products

Common Trade Names

310 Stainless

Features

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

Applications

  • Flare tips
  • Fluidized bed coal combustors
  • Radiant tubes
  • Tube hangers for petroleum refining and steam boilers
  • Coal gasifier internal components
  • Thermowells
  • Refractory anchor bolts
  • Burners, combustion chambers
  • Retorts, muffles, annealing covers
  • Food processing equipment
  • Cryogenic structures

Physical Properties

Density: 0.284 lb/inch3
Melting Point: 2470 - 2555°F

Temperature, °F 70 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
7.6 13.6 15.2 16.8 18.4 20.0 -
Modulus of Elasticity, Dynamic psi x 106 29.0 23.0 21.8 20.5 19.2 - -

* 70°F to indicated temperature.

Mechanical Properties

Representative Tensile Properties

Temperature, °F 10 1000 1200 1400 1600
Ultimate Tensile Strength, ksi 80.0 67.8 54.1 35.1 19.1
0.2% Yield Strength, ksi 35.0 20.8 20.7 19.3 12.2
Elongation, % 52 47 43 46 48

Typical Creep- Rupture Properties

Temperature, °F 1200 1400 1600 1800
Minimum Creep 0.0001%/Hr, ksi 14.9 3.3 1.1 0.28
10,000 Hour Rupture Strength, ksi 14.4 4.5 1.5 0.66