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SAE-AISI D4 Steel vs. ACI-ASTM CA6N Steel

Both SAE-AISI D4 steel and ACI-ASTM CA6N steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI D4 steel and the bottom bar is ACI-ASTM CA6N steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 8.4 to 15
17
Fatigue Strength, MPa 310 to 920
640
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 74
75
Tensile Strength: Ultimate (UTS), MPa 760 to 2060
1080
Tensile Strength: Yield (Proof), MPa 470 to 1540
1060

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 31
23
Thermal Expansion, µm/m-K 12
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.2
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 5.0
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
11
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.3
2.5
Embodied Energy, MJ/kg 49
35
Embodied Water, L/kg 100
110

Common Calculations

PREN (Pitting Resistance) 15
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100 to 160
180
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 75
38
Strength to Weight: Bending, points 24 to 47
30
Thermal Diffusivity, mm2/s 8.3
6.1
Thermal Shock Resistance, points 23 to 63
40

Alloy Composition

Carbon (C), % 2.1 to 2.4
0 to 0.060
Chromium (Cr), % 11 to 13
10.5 to 12.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 80.6 to 86.3
77.9 to 83.5
Manganese (Mn), % 0 to 0.6
0 to 0.5
Molybdenum (Mo), % 0.7 to 1.2
0
Nickel (Ni), % 0 to 0.3
6.0 to 8.0
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Vanadium (V), % 0 to 1.0
0