AISI Type 303 Stainless Steel, annealed, tested at 425°C (800°F)


Subcategory: Ferrous Metal; Heat Resisting; Metal; Stainless Steel; T 300 Series Stainless Steel

Close Analogs: AISI Type 303 Se

Key Words: T303, T 303, 303SS, 303 SS, AFNOR Z 10 CNF 18.09 (Fr), UNI X 10 CrNiS 18 09, SUS 303, SS14 2346 (Sweden), B.S. 303 S 21, UNS S30300, AMS 5640 (1), ASME SA194, ASME SA320, ASTM A194, ASTM A314, ASTM A320, ASTM A320, ASTM A473, ASTM A581, ASTM A582, MIL SPEC MIL-S-862, SAE J405 (30303), DIN 1.4305, X12CrNiS188, EN 58M, austenitic, ISO 683/13 17, 18-8

Component   Wt. %
CMax 0.15 
Cr18 
Fe69 
Component   Wt. %
MnMax 2 
MoMax 0.6 
Ni9 
Component   Wt. %
PMax 0.2 
SMin 0.15 
SiMax 1 

Material Notes:
Short time tensile test

Physical PropertiesMetricEnglishComments
Density8 g/cc0.289 lb/in³ 

Mechanical Properties
Tensile Strength, Ultimate420 MPa60900 psi 
Tensile Strength, Yield240 MPa34800 psi at 0.2% offset
Elongation at Break35 %35 % in 50 mm
Modulus of Elasticity193 GPa28000 ksi tension
Poisson's Ratio0.250.25 Calculated
Shear Modulus77.2 GPa11200 ksi 

Electrical Properties
Electrical Resistivity7.2e-005 ohm-cm7.2e-005 ohm-cm 

Thermal Properties
CTE, linear 250°C17.8 µm/m-°C9.89 µin/in-°F at 0-315°C (32-600°F)
CTE, linear 500°C18.4 µm/m-°C10.2 µin/in-°F at 0-540°C, 18.7 µm/m-C at 0-650°C
Specific Heat Capacity0.5 J/g-°C0.12 BTU/lb-°F from 0-100°C (32-212°F)
Thermal Conductivity16.2 W/m-K112 BTU-in/hr-ft²-°F at 100°C (212°F), 21.5 W/m-K at 500°C (930°F)
Melting Point1400 - 1420 °C2550 - 2590 °F 
Solidus1400 °C2550 °F 
Liquidus1420 °C2590 °F 

References for this datasheet.


Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistant format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's disclaimer and terms of use regarding this information. MatWeb data and tools provided by MatWeb, LLC.