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EN 1.4845 Stainless Steel vs. SAE-AISI 4145 Steel

Both EN 1.4845 stainless steel and SAE-AISI 4145 steel are iron alloys. They have 55% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4845 stainless steel and the bottom bar is SAE-AISI 4145 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
310
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 38
16
Fatigue Strength, MPa 200
240
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 410
360
Tensile Strength: Ultimate (UTS), MPa 600
580
Tensile Strength: Yield (Proof), MPa 240
360

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1050
420
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1360
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
42
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 25
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.3
1.5
Embodied Energy, MJ/kg 61
20
Embodied Water, L/kg 190
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
80
Resilience: Unit (Modulus of Resilience), kJ/m3 140
350
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
21
Strength to Weight: Bending, points 20
20
Thermal Diffusivity, mm2/s 4.0
11
Thermal Shock Resistance, points 14
17

Alloy Composition

Carbon (C), % 0 to 0.1
0.43 to 0.48
Chromium (Cr), % 24 to 26
0.8 to 1.1
Iron (Fe), % 48.2 to 57
96.7 to 97.7
Manganese (Mn), % 0 to 2.0
0.75 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 19 to 22
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 1.5
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.040