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SAE-AISI 1144 Steel vs. EN 1.4749 Stainless Steel

Both SAE-AISI 1144 steel and EN 1.4749 stainless steel are iron alloys. They have 72% of their average alloy composition in common. There are 31 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 1144 steel and the bottom bar is EN 1.4749 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 230
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 17
16
Fatigue Strength, MPa 280 to 430
190
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
80
Shear Strength, MPa 460 to 510
370
Tensile Strength: Ultimate (UTS), MPa 750 to 840
600
Tensile Strength: Yield (Proof), MPa 420 to 690
320

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 400
1100
Melting Completion (Liquidus), °C 1450
1420
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 51
17
Thermal Expansion, µm/m-K 13
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
13
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 1.4
2.5
Embodied Energy, MJ/kg 19
36
Embodied Water, L/kg 47
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 91 to 110
80
Resilience: Unit (Modulus of Resilience), kJ/m3 480 to 1290
250
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 27 to 30
22
Strength to Weight: Bending, points 23 to 25
21
Thermal Diffusivity, mm2/s 14
4.6
Thermal Shock Resistance, points 22 to 24
22

Alloy Composition

Carbon (C), % 0.4 to 0.48
0.15 to 0.2
Chromium (Cr), % 0
26 to 29
Iron (Fe), % 97.5 to 98
68.5 to 73.7
Manganese (Mn), % 1.4 to 1.7
0 to 1.0
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0.24 to 0.33
0 to 0.015