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EN 1.7725 Steel vs. ACI-ASTM CA6NM Steel

Both EN 1.7725 steel and ACI-ASTM CA6NM steel are iron alloys. They have 84% of their average alloy composition in common. There are 31 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 EN 1.7725 steel and the bottom bar is ACI-ASTM CA6NM steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250 to 300
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
17
Fatigue Strength, MPa 390 to 550
380
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
850
Tensile Strength: Yield (Proof), MPa 610 to 860
620

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 440
770
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
10
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
2.5
Embodied Energy, MJ/kg 24
34
Embodied Water, L/kg 54
110

Common Calculations

PREN (Pitting Resistance) 2.8
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
130
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
1000
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29 to 35
30
Strength to Weight: Bending, points 25 to 28
26
Thermal Diffusivity, mm2/s 11
6.7
Thermal Shock Resistance, points 24 to 29
31

Alloy Composition

Carbon (C), % 0.27 to 0.34
0 to 0.060
Chromium (Cr), % 1.3 to 1.7
11.5 to 14
Iron (Fe), % 95.7 to 97.5
78.4 to 84.6
Manganese (Mn), % 0.6 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.3 to 0.5
0.4 to 1.0
Nickel (Ni), % 0
3.5 to 4.5
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.050 to 0.15
0