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EN 1.7221 Steel vs. EN 1.4749 Stainless Steel

Both EN 1.7221 steel and EN 1.4749 stainless steel are iron alloys. They have 73% 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 1.7221 steel and the bottom bar is EN 1.4749 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 230
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 17
16
Fatigue Strength, MPa 290 to 390
190
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 650 to 780
600
Tensile Strength: Yield (Proof), MPa 430 to 630
320

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 420
1100
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 44
17
Thermal Expansion, µm/m-K 13
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
13
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 1.5
2.5
Embodied Energy, MJ/kg 20
36
Embodied Water, L/kg 51
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 98
80
Resilience: Unit (Modulus of Resilience), kJ/m3 490 to 1050
250
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 23 to 27
22
Strength to Weight: Bending, points 21 to 24
21
Thermal Diffusivity, mm2/s 12
4.6
Thermal Shock Resistance, points 19 to 23
22

Alloy Composition

Carbon (C), % 0.22 to 0.29
0.15 to 0.2
Chromium (Cr), % 0.8 to 1.2
26 to 29
Iron (Fe), % 96.8 to 98.3
68.5 to 73.7
Manganese (Mn), % 0.5 to 0.8
0 to 1.0
Molybdenum (Mo), % 0.15 to 0.3
0
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015