MakeItFrom.com
Menu (ESC)

EN 1.4640 Stainless Steel vs. ACI-ASTM CF20 Steel

Both EN 1.4640 stainless steel and ACI-ASTM CF20 steel are iron alloys. They have a moderately high 95% 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 1.4640 stainless steel and the bottom bar is ACI-ASTM CF20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 200
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
50
Fatigue Strength, MPa 230 to 250
240
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 620 to 650
530
Tensile Strength: Yield (Proof), MPa 240 to 260
250

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 930
970
Melting Completion (Liquidus), °C 1420
1420
Melting Onset (Solidus), °C 1380
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 14
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.8
3.1
Embodied Energy, MJ/kg 40
44
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 20
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250 to 260
220
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 170
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 23
19
Strength to Weight: Bending, points 21
19
Thermal Diffusivity, mm2/s 4.0
4.3
Thermal Shock Resistance, points 14 to 15
11

Alloy Composition

Carbon (C), % 0.030 to 0.080
0 to 0.2
Chromium (Cr), % 18 to 19
18 to 21
Copper (Cu), % 1.3 to 2.0
0
Iron (Fe), % 67.4 to 73.6
64.2 to 74
Manganese (Mn), % 1.5 to 4.0
0 to 1.5
Nickel (Ni), % 5.5 to 6.9
8.0 to 11
Nitrogen (N), % 0.030 to 0.11
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.040