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SAE-AISI 1040 Steel vs. EN 1.4749 Stainless Steel

Both SAE-AISI 1040 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 1040 steel and the bottom bar is EN 1.4749 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 180
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 13 to 20
16
Fatigue Strength, MPa 220 to 340
190
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
80
Shear Strength, MPa 350 to 390
370
Tensile Strength: Ultimate (UTS), MPa 570 to 640
600
Tensile Strength: Yield (Proof), MPa 320 to 530
320

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 400
1100
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 51
17
Thermal Expansion, µm/m-K 12
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
13
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 1.4
2.5
Embodied Energy, MJ/kg 18
36
Embodied Water, L/kg 46
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 96
80
Resilience: Unit (Modulus of Resilience), kJ/m3 270 to 760
250
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 20 to 23
22
Strength to Weight: Bending, points 19 to 21
21
Thermal Diffusivity, mm2/s 14
4.6
Thermal Shock Resistance, points 18 to 20
22

Alloy Composition

Carbon (C), % 0.37 to 0.44
0.15 to 0.2
Chromium (Cr), % 0
26 to 29
Iron (Fe), % 98.6 to 99.03
68.5 to 73.7
Manganese (Mn), % 0.6 to 0.9
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 to 0.050
0 to 0.015