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EN 1.1221 Steel vs. S44735 Stainless Steel

Both EN 1.1221 steel and S44735 stainless steel are iron alloys. They have 66% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.1221 steel and the bottom bar is S44735 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 250
220
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 10 to 21
21
Fatigue Strength, MPa 240 to 340
300
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
82
Shear Strength, MPa 450 to 520
390
Tensile Strength: Ultimate (UTS), MPa 730 to 870
630
Tensile Strength: Yield (Proof), MPa 390 to 550
460

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 400
1100
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
21
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.5
4.4
Embodied Energy, MJ/kg 19
61
Embodied Water, L/kg 47
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
120
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
520
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 26 to 31
23
Strength to Weight: Bending, points 23 to 26
21
Thermal Shock Resistance, points 23 to 28
20

Alloy Composition

Carbon (C), % 0.57 to 0.65
0 to 0.030
Chromium (Cr), % 0 to 0.4
28 to 30
Iron (Fe), % 97.1 to 98.8
60.7 to 68.4
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Molybdenum (Mo), % 0 to 0.1
3.6 to 4.2
Nickel (Ni), % 0 to 0.4
0 to 1.0
Niobium (Nb), % 0
0.2 to 1.0
Nitrogen (N), % 0
0 to 0.045
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.030
Titanium (Ti), % 0
0.2 to 1.0