Stainless Steel 403 Furnace Components


Description
Stainless Steel 403 offers heat resistance and a scaling temperature of about 1300°F (704°C). This straight chromium stainless steel offers reasonable corrosion resistance and high mechanical characteristics.


Equivalent
Stainless steel grade 403 equivalent with:
AISI 403, AISI 614, ASTM A176, ASTM A276, ASTM A473, ASTM A314, ASTM A479, ASTM A511, ASTM A580, DIN 1.4000, QQ S763, AMS 5611, AMS 5612, FED QQ-S-763, MIL SPEC MIL-S-862, SAE 51403, SAE J405 (51403), etc



Chemical Composition Stainless 403
Type C Si Mn Cr S P
403 0.15 0.50 1.00 11.5-13.0 0.03 0.04
AISI410 0.08-0.15 1.00 1.00 11.5-13.5 0.03 0.04


Mechanical Properties

Properties
403
Tensile Strength (MPa) 485
Yield Strength (MPa) 310
Elongation (in 50mm) (%)  25
Hardness (HB) 139
Fatigue Strength (MPa) 275
Supplied Condition Annealed


Physical Properties

Properties
403
Density (×1000 kg/m3) 7.80
Elastic Modulus (GPa) 190-210
Thermal Conductivity (W/m-K) 21.5
Poisson's ratio 0.27-0.30
Specific Heat (J/kg-K) 450
Thermal Expansion (µm/m-K) 9.9
Ultimate Resilience (MJ/m3) 77-93


Heat Treatment of Stainless 403
Anneal by heating to 1350° to 1450°F (732° to 78°C), then air cool
To enhance softness, hold at 1450° to 1550°F (788° to 843°C), then furnace cool
Annealing reduces machinability
Harden by quenching from 1750° to 1850°F (954° to 1010°C) in air or oil, then draw between 800° and 1100°F (427° and 593°C)


Machinability of Stainless 403
200-240 Brinell hardness or cold-drawn condition recommended
Use chip curler cutting tools when turning
Grind slight flat on cutting lip face when drilling
Highly concentrated sulfur oil
Turn: 40-80 sfpm
Mill: 35-70
Broach: 8-15
Ream: 20-60
Drill: 30-60


Workability of Stainless 403
May be cold worked
Easily drop or hammer forged
Preheat 2x as long as carbon steel
Preheat to 1400° to 1450°F (760° to 788°C), then rapid heat to 2050° to 2150°F (1121° to 1177°C)
Reheat once temperature drops to 1450° to 1600°F (788° to 871°C)
Bury in dry lime or ash to slow cool



Application
Furnace components
Ladles used in molten nonferrous applications, turbine parts, compressor blades, Stirring rods



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