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.

shape Image

Dimension Name


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

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

Weight/Lineal Foot

2.99 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 g/cm^3 8
Brinell Hardness  160 min
Electrical resistivity 68 F 72 min
Electrical resistivity 1200 F 116 min
Impact values - Izod  60 min
Elongation  50 min
Magnetic permeability  1 min
Max operating temperature Continuous 1700
Max operating temperature Intermittent 1400
Mean Coefficient of Expansion 68-212F 9 min
Mean Coefficient of Expansion 68 to indicated-ºF 11 min
Melting Point  2550 min
Modulus of elasticity  29 min
Reduction of Area % 55 min
Rockwell Hardness  80 min
Specific Heat BTU/lb-°F (32-212F) 1
Thermal conductivity 212 F 9 min
Thermal conductivity 932 F 12 min
Yield  35 min
Ultimate Tensile Strength  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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