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EN 1.1221 Steel vs. S17700 Stainless Steel

Both EN 1.1221 steel and S17700 stainless 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 (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.1221 steel and the bottom bar is S17700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 250
180 to 430
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 10 to 21
1.0 to 23
Fatigue Strength, MPa 240 to 340
290 to 560
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
76
Shear Strength, MPa 450 to 520
740 to 940
Tensile Strength: Ultimate (UTS), MPa 730 to 870
1180 to 1650
Tensile Strength: Yield (Proof), MPa 390 to 550
430 to 1210

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
890
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 48
15
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
13
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.5
2.8
Embodied Energy, MJ/kg 19
40
Embodied Water, L/kg 47
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
15 to 210
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
460 to 3750
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26 to 31
42 to 59
Strength to Weight: Bending, points 23 to 26
32 to 40
Thermal Diffusivity, mm2/s 13
4.1
Thermal Shock Resistance, points 23 to 28
39 to 54

Alloy Composition

Aluminum (Al), % 0
0.75 to 1.5
Carbon (C), % 0.57 to 0.65
0 to 0.090
Chromium (Cr), % 0 to 0.4
16 to 18
Iron (Fe), % 97.1 to 98.8
70.5 to 76.8
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Molybdenum (Mo), % 0 to 0.1
0
Nickel (Ni), % 0 to 0.4
6.5 to 7.8
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

Comparable Variants