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ACI-ASTM CA6NM Steel vs. ACI-ASTM CA15 Steel

Both ACI-ASTM CA6NM steel and ACI-ASTM CA15 steel are iron alloys. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is ACI-ASTM CA6NM steel and the bottom bar is ACI-ASTM CA15 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
220
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
21
Fatigue Strength, MPa 380
370
Poisson's Ratio 0.28
0.28
Reduction in Area, % 40
34
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 850
700
Tensile Strength: Yield (Proof), MPa 620
570

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 770
750
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1400
1500
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
25
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 10
7.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.5
2.0
Embodied Energy, MJ/kg 34
28
Embodied Water, L/kg 110
100

Common Calculations

PREN (Pitting Resistance) 15
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
140
Resilience: Unit (Modulus of Resilience), kJ/m3 1000
820
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 30
25
Strength to Weight: Bending, points 26
23
Thermal Diffusivity, mm2/s 6.7
6.7
Thermal Shock Resistance, points 31
26

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.15
Chromium (Cr), % 11.5 to 14
11.5 to 14
Iron (Fe), % 78.4 to 84.6
81.8 to 88.5
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.4 to 1.0
0 to 0.5
Nickel (Ni), % 3.5 to 4.5
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.040