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EN 1.4594 Stainless Steel vs. SAE-AISI 1040 Steel

Both EN 1.4594 stainless steel and SAE-AISI 1040 steel are iron alloys. They have 77% of their average alloy composition in common. There are 30 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 1.4594 stainless steel and the bottom bar is SAE-AISI 1040 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11 to 17
13 to 20
Fatigue Strength, MPa 490 to 620
220 to 340
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 620 to 700
350 to 390
Tensile Strength: Ultimate (UTS), MPa 1020 to 1170
570 to 640
Tensile Strength: Yield (Proof), MPa 810 to 1140
320 to 530

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 820
400
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
51
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 15
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.2
1.4
Embodied Energy, MJ/kg 45
18
Embodied Water, L/kg 130
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 190
79 to 96
Resilience: Unit (Modulus of Resilience), kJ/m3 1660 to 3320
270 to 760
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 36 to 41
20 to 23
Strength to Weight: Bending, points 29 to 31
19 to 21
Thermal Diffusivity, mm2/s 4.4
14
Thermal Shock Resistance, points 34 to 39
18 to 20

Alloy Composition

Carbon (C), % 0 to 0.070
0.37 to 0.44
Chromium (Cr), % 13 to 15
0
Copper (Cu), % 1.2 to 2.0
0
Iron (Fe), % 72.6 to 79.5
98.6 to 99.03
Manganese (Mn), % 0 to 1.0
0.6 to 0.9
Molybdenum (Mo), % 1.2 to 2.0
0
Nickel (Ni), % 5.0 to 6.0
0
Niobium (Nb), % 0.15 to 0.6
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.7
0
Sulfur (S), % 0 to 0.015
0 to 0.050