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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.

Common Trade Names

310 Stainless

Inventory

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

Specifications

UNS S31008, UNS S31009, Werkstoff 1.4845, EN 10095
ASTM: A 240, A 276, A 312, A 479
ASME:SA-240, SA-479, SA-312
AMS:5521, 5651

Chemical Composition, %

 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.

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

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Page Description: Inventory available for prompt shipment of 310 Plate, Sheet, Bar, Pipe and Weld Wire!
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