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AISI 303 Stainless Steel vs. ACI-ASTM CA6N Steel

Both AISI 303 stainless steel and ACI-ASTM CA6N steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AISI 303 stainless steel and the bottom bar is ACI-ASTM CA6N steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40 to 51
17
Fatigue Strength, MPa 230 to 360
640
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 600 to 690
1080
Tensile Strength: Yield (Proof), MPa 230 to 420
1060

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 410
390
Maximum Temperature: Mechanical, °C 930
740
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
23
Thermal Expansion, µm/m-K 17
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 15
11
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.0
2.5
Embodied Energy, MJ/kg 42
35
Embodied Water, L/kg 140
110

Common Calculations

PREN (Pitting Resistance) 18
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
180
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 440
2900
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 25
38
Strength to Weight: Bending, points 20 to 22
30
Thermal Diffusivity, mm2/s 4.4
6.1
Thermal Shock Resistance, points 13 to 15
40

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.060
Chromium (Cr), % 17 to 19
10.5 to 12.5
Iron (Fe), % 67.3 to 74.9
77.9 to 83.5
Manganese (Mn), % 0 to 2.0
0 to 0.5
Nickel (Ni), % 8.0 to 10
6.0 to 8.0
Phosphorus (P), % 0 to 0.2
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0.15 to 0.35
0 to 0.020