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AISI 303 Stainless Steel vs. ACI-ASTM CN3M Steel

Both AISI 303 stainless steel and ACI-ASTM CN3M steel are iron alloys. They have 76% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, 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 CN3M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
140
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40 to 51
34
Fatigue Strength, MPa 230 to 360
150
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 600 to 690
500
Tensile Strength: Yield (Proof), MPa 230 to 420
190

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 410
430
Maximum Temperature: Mechanical, °C 930
1100
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
13
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 15
31
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 3.0
5.9
Embodied Energy, MJ/kg 42
80
Embodied Water, L/kg 140
200

Common Calculations

PREN (Pitting Resistance) 18
38
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
130
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 440
89
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 25
17
Strength to Weight: Bending, points 20 to 22
17
Thermal Diffusivity, mm2/s 4.4
3.4
Thermal Shock Resistance, points 13 to 15
11

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.030
Chromium (Cr), % 17 to 19
20 to 22
Iron (Fe), % 67.3 to 74.9
42.4 to 52.5
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0
4.5 to 5.5
Nickel (Ni), % 8.0 to 10
23 to 27
Phosphorus (P), % 0 to 0.2
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0.15 to 0.35
0 to 0.030