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EN 1.4945 Stainless Steel vs. ACI-ASTM CF8C Steel

Both EN 1.4945 stainless steel and ACI-ASTM CF8C steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4945 stainless steel and the bottom bar is ACI-ASTM CF8C steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 220
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 19 to 34
40
Fatigue Strength, MPa 230 to 350
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 640 to 740
530
Tensile Strength: Yield (Proof), MPa 290 to 550
260

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 520
490
Maximum Temperature: Mechanical, °C 920
980
Melting Completion (Liquidus), °C 1490
1420
Melting Onset (Solidus), °C 1440
1430
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 14
16
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 30
19
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 5.0
3.7
Embodied Energy, MJ/kg 73
53
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 23
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 180
180
Resilience: Unit (Modulus of Resilience), kJ/m3 210 to 760
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22 to 25
19
Strength to Weight: Bending, points 20 to 22
19
Thermal Diffusivity, mm2/s 3.7
4.3
Thermal Shock Resistance, points 14 to 16
11

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.080
Chromium (Cr), % 15.5 to 17.5
18 to 21
Iron (Fe), % 57.9 to 65.7
61.8 to 73
Manganese (Mn), % 0 to 1.5
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 15.5 to 17.5
9.0 to 12
Niobium (Nb), % 0.4 to 1.2
0 to 1.0
Nitrogen (N), % 0.060 to 0.14
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.3 to 0.6
0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.040
Tungsten (W), % 2.5 to 3.5
0