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Hardened AISI 414 vs. Hardened SAE-AISI D4

Both hardened AISI 414 and hardened SAE-AISI D4 are iron alloys. Both are furnished in the hardened (H) condition. They have a very high 96% of their average alloy composition in common. There are 29 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 hardened AISI 414 and the bottom bar is hardened SAE-AISI D4.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
8.4
Fatigue Strength, MPa 480
920
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
74
Shear Strength, MPa 590
1210
Tensile Strength: Ultimate (UTS), MPa 960
2060
Tensile Strength: Yield (Proof), MPa 790
1540

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
31
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
4.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
5.0

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
8.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.1
3.3
Embodied Energy, MJ/kg 29
49
Embodied Water, L/kg 100
100

Common Calculations

PREN (Pitting Resistance) 13
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 34
75
Strength to Weight: Bending, points 28
47
Thermal Diffusivity, mm2/s 6.7
8.3
Thermal Shock Resistance, points 35
63

Alloy Composition

Carbon (C), % 0 to 0.15
2.1 to 2.4
Chromium (Cr), % 11.5 to 13.5
11 to 13
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 81.8 to 87.3
80.6 to 86.3
Manganese (Mn), % 0 to 1.0
0 to 0.6
Molybdenum (Mo), % 0
0.7 to 1.2
Nickel (Ni), % 1.3 to 2.5
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0
0 to 1.0