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ACI-ASTM CF8M Steel vs. EN 1.4971 Stainless Steel

Both ACI-ASTM CF8M steel and EN 1.4971 stainless steel are iron alloys. They have 65% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 1.4971 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
240
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 50
34
Fatigue Strength, MPa 280
270
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
81
Tensile Strength: Ultimate (UTS), MPa 540
800
Tensile Strength: Yield (Proof), MPa 290
340

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 420
570
Maximum Temperature: Mechanical, °C 1000
1100
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 16
13
Thermal Expansion, µm/m-K 16
15

Otherwise Unclassified Properties

Base Metal Price, % relative 19
70
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 3.8
7.6
Embodied Energy, MJ/kg 53
110
Embodied Water, L/kg 160
300

Common Calculations

PREN (Pitting Resistance) 28
38
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
220
Resilience: Unit (Modulus of Resilience), kJ/m3 210
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
26
Strength to Weight: Bending, points 19
23
Thermal Diffusivity, mm2/s 4.3
3.4
Thermal Shock Resistance, points 12
19

Alloy Composition

Carbon (C), % 0 to 0.080
0.080 to 0.16
Chromium (Cr), % 18 to 21
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Iron (Fe), % 60.3 to 71
24.3 to 37.1
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 2.0 to 3.0
2.5 to 3.5
Nickel (Ni), % 9.0 to 12
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.015
Tungsten (W), % 0
2.0 to 3.0