Stainless Steel 303 Material Property Data Sheet

AISI Type 303 Stainless Steel, annealed bar, tested at RT

Subcategory: 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. % C Max 0.15   Cr 18   Fe 69

Component    Wt. % Mn Max 2   Mo Max 0.6   Ni 9

Max 0.2 Component    Wt. % P   S Min 0.15   Si Max 1

Physical Properties	Metric	English	Comments
Density	8 g/cc	0.289 lb/in³
Mechanical Properties
Hardness, Brinell	160	160
Hardness, Knoop	180	180	Converted from Brinell hardness.
Hardness, Rockwell B	83	83	Converted from Brinell hardness.
Hardness, Vickers	167	167	Converted from Brinell hardness.
Tensile Strength, Ultimate	620 MPa	89900 psi
Tensile Strength, Yield	240 MPa	34800 psi	at 0.2% offset
Elongation at Break	50 %	50 %	in 50 mm
Modulus of Elasticity	193 GPa	28000 ksi	tension
Poisson's Ratio	0.25	0.25	Calculated
Fatigue Strength	240 MPa	34800 psi	annealed
Fatigue Strength	330 MPa	47900 psi	25% hardened
Shear Modulus	77.2 GPa	11200 ksi
Electrical Properties
Electrical Resistivity	7.2e-005 ohm-cm	7.2e-005 ohm-cm
Magnetic Permeability	1.008	1.008	at RT
Thermal Properties
CTE, linear 20°C	17.2 µm/m-°C	9.56 µin/in-°F	from from 0-100°C
CTE, linear 250°C	17.8 µm/m-°C	9.89 µin/in-°F	at 0-315°C (32-600°F)
CTE, linear 500°C	18.4 µm/m-°C	10.2 µin/in-°F	at 0-540°C, 18.7 µm/m-C at 0-650°C
Heat Capacity	0.5 J/g-°C	0.12 BTU/lb-°F	from 0-100°C (32-212°F)
Thermal Conductivity	16.2 W/m-K	112 BTU-in/hr-ft²-°F	at 100°C (212°F), 21.5 W/m-K at 500°C (930°F)
Melting Point	1400 - 1420 °C	2550 - 2590 °F
Solidus	1400 °C	2550 °F
Liquidus	1420 °C	2590 °F

References are available for this material.