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EN 1.4550 Stainless Steel vs. SAE-AISI 1040 Steel

Both EN 1.4550 stainless steel and SAE-AISI 1040 steel are iron alloys. They have 70% 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 1.4550 stainless steel and the bottom bar is SAE-AISI 1040 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
160 to 180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 42
13 to 20
Fatigue Strength, MPa 210
220 to 340
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 430
350 to 390
Tensile Strength: Ultimate (UTS), MPa 620
570 to 640
Tensile Strength: Yield (Proof), MPa 230
320 to 530

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 940
400
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
51
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 18
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
1.4
Embodied Energy, MJ/kg 51
18
Embodied Water, L/kg 140
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
79 to 96
Resilience: Unit (Modulus of Resilience), kJ/m3 140
270 to 760
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
20 to 23
Strength to Weight: Bending, points 21
19 to 21
Thermal Diffusivity, mm2/s 4.0
14
Thermal Shock Resistance, points 14
18 to 20

Alloy Composition

Carbon (C), % 0 to 0.080
0.37 to 0.44
Chromium (Cr), % 17 to 19
0
Iron (Fe), % 64.9 to 74
98.6 to 99.03
Manganese (Mn), % 0 to 2.0
0.6 to 0.9
Nickel (Ni), % 9.0 to 12
0
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0 to 0.050