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EN 1.4008 Stainless Steel vs. EN 1.7228 Steel

Both EN 1.4008 stainless steel and EN 1.7228 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have 86% of their average alloy composition in common. There are 30 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 1.4008 stainless steel and the bottom bar is EN 1.7228 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
12
Fatigue Strength, MPa 300
390
Impact Strength: V-Notched Charpy, J 31
22
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 670
900
Tensile Strength: Yield (Proof), MPa 500
630

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 760
420
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
46
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
2.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.1
1.5
Embodied Energy, MJ/kg 30
20
Embodied Water, L/kg 100
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
100
Resilience: Unit (Modulus of Resilience), kJ/m3 630
1050
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
32
Strength to Weight: Bending, points 22
26
Thermal Diffusivity, mm2/s 6.7
12
Thermal Shock Resistance, points 23
26

Alloy Composition

Carbon (C), % 0 to 0.1
0.46 to 0.54
Chromium (Cr), % 12 to 13.5
0.9 to 1.2
Iron (Fe), % 81.8 to 86.8
96.7 to 98
Manganese (Mn), % 0 to 1.0
0.5 to 0.8
Molybdenum (Mo), % 0.2 to 0.5
0.15 to 0.3
Nickel (Ni), % 1.0 to 2.0
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.025
0 to 0.035