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AISI 303 Stainless Steel vs. ASTM A203 Steel

Both AISI 303 stainless steel and ASTM A203 steel are iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 303 stainless steel and the bottom bar is ASTM A203 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
160 to 180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40 to 51
22 to 26
Fatigue Strength, MPa 230 to 360
210 to 280
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 430 to 470
330 to 370
Tensile Strength: Ultimate (UTS), MPa 600 to 690
520 to 590
Tensile Strength: Yield (Proof), MPa 230 to 420
290 to 390

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 930
410
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
52
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.4 to 7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
8.5 to 8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 15
3.2 to 4.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.0
1.6 to 1.7
Embodied Energy, MJ/kg 42
21 to 23
Embodied Water, L/kg 140
50 to 52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 440
230 to 410
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 25
18 to 21
Strength to Weight: Bending, points 20 to 22
18 to 20
Thermal Diffusivity, mm2/s 4.4
14
Thermal Shock Resistance, points 13 to 15
15 to 17