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AISI 309S Stainless Steel vs. EN 1.1121 Steel

Both AISI 309S stainless steel and EN 1.1121 steel are iron alloys. Both are furnished in the annealed condition. They have 63% 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 AISI 309S stainless steel and the bottom bar is EN 1.1121 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
120
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 42
28
Fatigue Strength, MPa 210
160
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 400
260
Tensile Strength: Ultimate (UTS), MPa 580
400
Tensile Strength: Yield (Proof), MPa 230
210

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1080
400
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1370
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
53
Thermal Expansion, µm/m-K 16
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 19
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 170
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
93
Resilience: Unit (Modulus of Resilience), kJ/m3 140
110
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
14
Strength to Weight: Bending, points 20
15
Thermal Diffusivity, mm2/s 4.0
14
Thermal Shock Resistance, points 13
13

Alloy Composition

Carbon (C), % 0 to 0.080
0.070 to 0.13
Chromium (Cr), % 22 to 24
0
Iron (Fe), % 58.1 to 66
98.8 to 99.63
Manganese (Mn), % 0 to 2.0
0.3 to 0.6
Nickel (Ni), % 12 to 15
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 0.75
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.035