Stainless 303 Product Guide

Applications | Specifications | Mechanical and Chemical Data | Tolerances

Overview

The main value of 303 stainless steel is its ease of machining, grinding, and polishing due to the presence of Sulphur in the alloy. However, this slightly does lower the corrosion resistance and toughness of the metal. But despite this, it remains a tough, austenitic stainless steel alloy. It is typically used in aircraft applications, machine parts, pump and valve parts, architectural applications, nuts, and bolts.

Common Trade Names

UNS S30300, AISI 303, Alloy 303, T303, T-303, SS2346, austenitic stainless steel

Other Resources

Safety Data Sheet | Weight Calculator | Mill Test Reports

Products

Applications

Aerospace
Machine Parts
Pump and Valve Parts
Architectural Design/Trim
Nuts
Bolts

Stainless 303 Specifications

ASTM	AMS
A895	5640

	Annealed
Physical Properties 303
Density	0.289 lb/in3
Ultimate Tensile Strength	88.5 ksi
Yield Tensile Strength	34.4 ksi
Shear Modulus	11,000 ksi
Shear Strength	62 ksi
Fatigue Strength	33.9 ksi
Hardness Rockwell \| Brinell	B85 \| 165
Elongation at Break Percentage	44%
Reduction of Area	50.5%
Modulus of Elasticity	28,000 ksi
Poisson's Ratio	0.27
Machinability Percentage	75%
Melting Point	2,550-2,590 °F
Specific Heat	1.1 x 10^-1 BTU/lb-°F
Thermal Conductivity	112 BTU-in/hr-ft^2-°F
Electrical Conductivity	2.4% IACS

Chemistry Information
Element	Percentage
C	0.15 max
Cr	18
Fe	69
Mn	2 max
Ni	9
Mo	0.6 max
P	0.2 max
S	0.15 max
Si	1 max

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