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EN 1.4318 Stainless Steel vs. SAE-AISI 1090 Steel

Both EN 1.4318 stainless steel and SAE-AISI 1090 steel are iron alloys. They have 75% 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 1.4318 stainless steel and the bottom bar is SAE-AISI 1090 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
220 to 280
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 44
11
Fatigue Strength, MPa 340
320 to 380
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 520
470 to 570
Tensile Strength: Ultimate (UTS), MPa 740
790 to 950
Tensile Strength: Yield (Proof), MPa 380
520 to 610

Thermal Properties

Latent Heat of Fusion, J/g 290
240
Maximum Temperature: Mechanical, °C 910
400
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1380
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
50
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 13
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.4
Embodied Energy, MJ/kg 39
19
Embodied Water, L/kg 130
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
82 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 360
730 to 1000
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27
28 to 34
Strength to Weight: Bending, points 23
24 to 27
Thermal Diffusivity, mm2/s 4.0
13
Thermal Shock Resistance, points 17
25 to 31

Alloy Composition

Carbon (C), % 0 to 0.030
0.85 to 1.0
Chromium (Cr), % 16.5 to 18.5
0
Iron (Fe), % 70.2 to 77.4
98 to 98.6
Manganese (Mn), % 0 to 2.0
0.6 to 0.9
Nickel (Ni), % 6.0 to 8.0
0
Nitrogen (N), % 0.1 to 0.2
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