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AISI 303 Stainless Steel vs. ACI-ASTM CN3MN Steel

Both AISI 303 stainless steel and ACI-ASTM CN3MN steel are iron alloys. They have 74% 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 CN3MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
180
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 40 to 51
39
Fatigue Strength, MPa 230 to 360
250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 600 to 690
620
Tensile Strength: Yield (Proof), MPa 230 to 420
300

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
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 16
13
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 15
33
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 3.0
6.2
Embodied Energy, MJ/kg 42
84
Embodied Water, L/kg 140
200

Common Calculations

PREN (Pitting Resistance) 18
46
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
200
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 440
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 25
21
Strength to Weight: Bending, points 20 to 22
20
Thermal Diffusivity, mm2/s 4.4
3.4
Thermal Shock Resistance, points 13 to 15
14

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.030
Chromium (Cr), % 17 to 19
20 to 22
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 67.3 to 74.9
41.4 to 50.3
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 8.0 to 10
23.5 to 25.5
Nitrogen (N), % 0
0.18 to 0.26
Phosphorus (P), % 0 to 0.2
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0.15 to 0.35
0 to 0.010