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EN 1.4550 Stainless Steel vs. SAE-AISI 1090 Steel

Both EN 1.4550 stainless steel and SAE-AISI 1090 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 1090 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
220 to 280
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 42
11
Fatigue Strength, MPa 210
320 to 380
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 430
470 to 570
Tensile Strength: Ultimate (UTS), MPa 620
790 to 950
Tensile Strength: Yield (Proof), MPa 230
520 to 610

Thermal Properties

Latent Heat of Fusion, J/g 290
240
Maximum Temperature: Mechanical, °C 940
400
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
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 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
19
Embodied Water, L/kg 140
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
82 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 140
730 to 1000
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
28 to 34
Strength to Weight: Bending, points 21
24 to 27
Thermal Diffusivity, mm2/s 4.0
13
Thermal Shock Resistance, points 14
25 to 31

Alloy Composition

Carbon (C), % 0 to 0.080
0.85 to 1.0
Chromium (Cr), % 17 to 19
0
Iron (Fe), % 64.9 to 74
98 to 98.6
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