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SAE-AISI 1144 Steel vs. EN 1.4557 Stainless Steel

Both SAE-AISI 1144 steel and EN 1.4557 stainless steel are iron alloys. They have 54% of their average alloy composition in common. There are 30 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 1144 steel and the bottom bar is EN 1.4557 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 230
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 17
40
Fatigue Strength, MPa 280 to 430
260
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
80
Tensile Strength: Ultimate (UTS), MPa 750 to 840
560
Tensile Strength: Yield (Proof), MPa 420 to 690
300

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 400
1090
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 51
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
2.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
29
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.4
5.6
Embodied Energy, MJ/kg 19
76
Embodied Water, L/kg 47
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 91 to 110
190
Resilience: Unit (Modulus of Resilience), kJ/m3 480 to 1290
210
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 27 to 30
19
Strength to Weight: Bending, points 23 to 25
19
Thermal Diffusivity, mm2/s 14
4.0
Thermal Shock Resistance, points 22 to 24
12

Alloy Composition

Carbon (C), % 0.4 to 0.48
0 to 0.020
Chromium (Cr), % 0
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 97.5 to 98
49.5 to 56.3
Manganese (Mn), % 1.4 to 1.7
0 to 1.2
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0
17.5 to 19.5
Nitrogen (N), % 0
0.18 to 0.24
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0.24 to 0.33
0 to 0.010