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ACI-ASTM CF8M Steel vs. EN 1.3956 Stainless Steel

Both ACI-ASTM CF8M steel and EN 1.3956 stainless steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF8M steel and the bottom bar is EN 1.3956 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 50
27
Fatigue Strength, MPa 280
240
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
79
Tensile Strength: Ultimate (UTS), MPa 540
650
Tensile Strength: Yield (Proof), MPa 290
330

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 420
460
Maximum Temperature: Mechanical, °C 1000
1080
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 19
22
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.8
4.8
Embodied Energy, MJ/kg 53
68
Embodied Water, L/kg 160
180

Common Calculations

PREN (Pitting Resistance) 28
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
150
Resilience: Unit (Modulus of Resilience), kJ/m3 210
270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
23
Strength to Weight: Bending, points 19
21
Thermal Shock Resistance, points 12
18

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.060
Chromium (Cr), % 18 to 21
20.5 to 23.5
Iron (Fe), % 60.3 to 71
51.9 to 62.1
Manganese (Mn), % 0 to 1.5
4.0 to 6.0
Molybdenum (Mo), % 2.0 to 3.0
1.5 to 3.0
Nickel (Ni), % 9.0 to 12
11.5 to 13.5
Niobium (Nb), % 0
0.1 to 0.3
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030
Vanadium (V), % 0
0.1 to 0.3