MakeItFrom.com
Menu (ESC)

EN 1.7725 Steel vs. EN 1.7221 Steel

Both EN 1.7725 steel and EN 1.7221 steel are iron alloys. Their average alloy composition is basically identical. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.7725 steel and the bottom bar is EN 1.7221 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250 to 300
200 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
11 to 17
Fatigue Strength, MPa 390 to 550
290 to 390
Impact Strength: V-Notched Charpy, J 34 to 35
20 to 38
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
650 to 780
Tensile Strength: Yield (Proof), MPa 610 to 860
430 to 630

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 440
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.5
Embodied Energy, MJ/kg 24
20
Embodied Water, L/kg 54
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
83 to 98
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
490 to 1050
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29 to 35
23 to 27
Strength to Weight: Bending, points 25 to 28
21 to 24
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 24 to 29
19 to 23

Alloy Composition

Carbon (C), % 0.27 to 0.34
0.22 to 0.29
Chromium (Cr), % 1.3 to 1.7
0.8 to 1.2
Iron (Fe), % 95.7 to 97.5
96.8 to 98.3
Manganese (Mn), % 0.6 to 1.0
0.5 to 0.8
Molybdenum (Mo), % 0.3 to 0.5
0.15 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.6
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.050 to 0.15
0