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AISI 347 Stainless Steel vs. ACI-ASTM CN7MS Steel

Both AISI 347 stainless steel and ACI-ASTM CN7MS steel are iron alloys. They have 79% of their average alloy composition in common. There are 30 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 347 stainless steel and the bottom bar is ACI-ASTM CN7MS steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 210
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34 to 46
39
Fatigue Strength, MPa 220 to 270
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 610 to 690
540
Tensile Strength: Yield (Proof), MPa 240 to 350
230

Thermal Properties

Latent Heat of Fusion, J/g 290
340
Maximum Temperature: Corrosion, °C 480
420
Maximum Temperature: Mechanical, °C 870
1040
Melting Completion (Liquidus), °C 1430
1400
Melting Onset (Solidus), °C 1400
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
12
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 19
28
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.6
5.1
Embodied Energy, MJ/kg 52
71
Embodied Water, L/kg 150
180

Common Calculations

PREN (Pitting Resistance) 18
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 220
170
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 310
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 25
19
Strength to Weight: Bending, points 20 to 22
19
Thermal Diffusivity, mm2/s 4.3
3.2
Thermal Shock Resistance, points 13 to 15
13

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.070
Chromium (Cr), % 17 to 19
18 to 20
Copper (Cu), % 0
1.5 to 2.0
Iron (Fe), % 64.1 to 74
45.4 to 53.5
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
2.5 to 3.0
Nickel (Ni), % 9.0 to 13
22 to 25
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
2.5 to 3.5
Sulfur (S), % 0 to 0.030
0 to 0.030