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EN 1.1221 Steel vs. AISI 439 Stainless Steel

Both EN 1.1221 steel and AISI 439 stainless steel are iron alloys. They have 81% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.1221 steel and the bottom bar is AISI 439 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 250
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 10 to 21
23
Fatigue Strength, MPa 240 to 340
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Shear Strength, MPa 450 to 520
310
Tensile Strength: Ultimate (UTS), MPa 730 to 870
490
Tensile Strength: Yield (Proof), MPa 390 to 550
250

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
890
Melting Completion (Liquidus), °C 1460
1510
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 48
25
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
9.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.5
2.3
Embodied Energy, MJ/kg 19
34
Embodied Water, L/kg 47
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
95
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26 to 31
18
Strength to Weight: Bending, points 23 to 26
18
Thermal Diffusivity, mm2/s 13
6.7
Thermal Shock Resistance, points 23 to 28
16

Alloy Composition

Aluminum (Al), % 0
0 to 0.15
Carbon (C), % 0.57 to 0.65
0 to 0.030
Chromium (Cr), % 0 to 0.4
17 to 19
Iron (Fe), % 97.1 to 98.8
77.1 to 82.8
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Molybdenum (Mo), % 0 to 0.1
0
Nickel (Ni), % 0 to 0.4
0 to 0.5
Nitrogen (N), % 0
0 to 0.030
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 1.1