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EN 1.1127 Steel vs. S31803 Stainless Steel

Both EN 1.1127 steel and S31803 stainless 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 1.1127 steel and the bottom bar is S31803 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 230
260
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14 to 25
29
Fatigue Strength, MPa 280 to 370
370
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
80
Shear Strength, MPa 420 to 480
460
Tensile Strength: Ultimate (UTS), MPa 660 to 790
710
Tensile Strength: Yield (Proof), MPa 410 to 580
500

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 400
1060
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 49
16
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
17
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
3.6
Embodied Energy, MJ/kg 19
49
Embodied Water, L/kg 49
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 90 to 140
180
Resilience: Unit (Modulus of Resilience), kJ/m3 440 to 880
630
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23 to 28
25
Strength to Weight: Bending, points 22 to 24
23
Thermal Diffusivity, mm2/s 13
4.3
Thermal Shock Resistance, points 21 to 25
20

Alloy Composition

Carbon (C), % 0.34 to 0.42
0 to 0.030
Chromium (Cr), % 0 to 0.4
21 to 23
Iron (Fe), % 96.6 to 98.1
63.7 to 71.9
Manganese (Mn), % 1.4 to 1.7
0 to 2.0
Molybdenum (Mo), % 0 to 0.1
2.5 to 3.5
Nickel (Ni), % 0 to 0.4
4.5 to 6.5
Nitrogen (N), % 0
0.080 to 0.2
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.020