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SAE-AISI D4 Steel vs. ASTM A387 Grade 12 Steel

Both SAE-AISI D4 steel and ASTM A387 grade 12 steel are iron alloys. They have 86% of their average alloy composition in common. There are 29 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 SAE-AISI D4 steel and the bottom bar is ASTM A387 grade 12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 8.4 to 15
25
Fatigue Strength, MPa 310 to 920
190 to 230
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 460 to 1210
300 to 330
Tensile Strength: Ultimate (UTS), MPa 760 to 2060
470 to 520
Tensile Strength: Yield (Proof), MPa 470 to 1540
260 to 310

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 31
44
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 5.0
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
2.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.3
1.6
Embodied Energy, MJ/kg 49
21
Embodied Water, L/kg 100
51

Common Calculations

PREN (Pitting Resistance) 15
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100 to 160
98 to 110
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27 to 75
16 to 18
Strength to Weight: Bending, points 24 to 47
17 to 18
Thermal Diffusivity, mm2/s 8.3
12
Thermal Shock Resistance, points 23 to 63
14 to 15

Alloy Composition

Carbon (C), % 2.1 to 2.4
0.050 to 0.17
Chromium (Cr), % 11 to 13
0.8 to 1.2
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 80.6 to 86.3
97 to 98.2
Manganese (Mn), % 0 to 0.6
0.4 to 0.65
Molybdenum (Mo), % 0.7 to 1.2
0.45 to 0.6
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.6
0.15 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.025
Vanadium (V), % 0 to 1.0
0

Comparable Variants