See Stainless Steel Tolerances

Stainless Hex Bar 303 is one of the easiest stainless steel alloys to machine, grind and polish. Toughness and corrosion resistance are slightly lower than most other stainless steels as a result. It is typically used in aircraft applications, machine parts, pump and valve parts, architectural applications, nuts, and bolts.

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Dimension Name


Alloy 303
Temper Annealed
Production Method Cold Finish
Max Length 144
Across Flats 1.375
MTR Availability Yes
Full Length true
Material Stainless Steel
Shape Bar-Hex
Custom Cut Warehouse 1
Material Specifications

This material meets the following specs: AMS -QQ-S-764, AMS -5640, ASTM -A484, ASTM -A582

Weight/Lineal Foot

5.65 pounds
Please note that this data is to be used ONLY FOR REFERENCE, NOT FOR DESIGN, and by using it,you agree that any decisions you make regarding materials for your project are at your own discretion.

Mechanical Properties

Property Value
Density lb./in.^3 0
Brinell Hardness  160 min
Electrical resistivity  72 min
Electrical resistivity  116 min
Impact values - Izod -ft-lb 60 min
Elongation % in 2 inches 50 min
Magnetic permeability  1 min
Max operating temperature ºF 1700
Max operating temperature ºF 1400
Mean Coefficient of Expansion in/in/ºF x 10^6 9 min
Mean Coefficient of Expansion in/in/ºF x 10^6 11 min
Melting Point ºF 2550 min
Modulus of elasticity lb./in.^2 x 10^6 29 min
Reduction in area % min 55 min
Rockwell Hardness B Scale 80 min
Specific heat BTU/ºF/lb (32-212F) 0 min
Thermal conductivity BTU/ft^2/hr/ºF/ft 9 min
Thermal conductivity BTU/ft^2/hr/ºF/ft 12 min
Yield KSI 35 min
Ultimate KSI 90 min

Chemistry Information: 303 Stainless Steel

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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