Stainless Steel PHYSICAL & Chemical PROPERTIES

Here are the physical and chemical properties of the 301, 302, and 304 stainless steel that we regularly stock - including the free bend requirements for each alloy. 

301 Physical Properties
UNS Designation S30100
  Tensile Yield Elongation Thickness   
Condition  ksi ksi in 2" min % 0.015 in 0.015 - 0.030 in > 0.030 in 
Annealed 75 30 40  45    
1/4 Hard 125 75   25 25 25
1/2 Hard 150 110   15 18 18
Full Hard 185 140   8 9 9


301 Free Bend Requirements
UNS Designation S30100
  Thickness 0.050 in Thickness > 0.050 to 0.1874 in
Condition Bend Angle Bend Factor Bend Angle
1/4 Hard 180° 1 90°
1/2 Hard 180° 2 90°
Full Hard 180° 4 90° 


302 Physical Properties
UNS Designation S30200
  Tensile Yield Elongation Hardness Max Thickness   
Condition  ksi ksi in 2" min % Brinell/Rockwell B 0.015 in 0.015 - 0.030 in > 0.030 in 
Annealed 75 30 40 201/92      
1/4 Hard 125 30     10 10 12
1/2 Hard 150 110     9 10 10
Full Hard 185 140     3 4 4


302 Free Bend Requirements
UNS Designation S30200
  Thickness 0.050 in Thickness > 0.050 to 0.1874 in
Condition Bend Angle Bend Factor Bend Angle
1/4 Hard 180° 1 90°
1/2 Hard 180° 2 90° 


304 Physical Properties
UNS Designation S30400
  Tensile Yield Elongation Hardness Max Thickness   
 Condition ksi ksi in 2" min % Brinell/Rockwell B 0.015 in 0.015 - 0.030 in > 0.030 in 
Annealed 75 30 40 201/92      
1/4 Hard 125 75     10 10 12
1/2 Hard 150 110     6 7 7


304 Free Bend Requirements
UNS Designation S30400
  Thickness 0.050 in Thickness > 0.050 to 0.1874 in
Condition Bend Angle Bend Factor Bend Angle
1/4 Hard 180° 1 90°
1/2 Hard 180° 2 90°



Stainless Steel Chemical Composition
ASTM A240/A666
Annealed, 1/4 Hard, 1/2 Hard, Full Hard
 
UNS Designation
Carbon
Manganese
Phosphorus Sulfur Silicon  Chromium  Nickel  Other Elements 
301
S30100
0.15
2.00
0.045  0.03  1.00  16.0-18.0  6.0-8.0  N 0.10
302
S30200

0.15

2.00
0.045  0.03  0.75  17.0-19.0  8.0-10.0  
304
S30400
0.03
2.00
0.045  0.03  0.75  18.0-20.0  8.0-10.5  N 0.10
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