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EN 1.7725 Steel vs. EN 1.8898 Steel

Both EN 1.7725 steel and EN 1.8898 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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 1.8898 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250 to 300
180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
18
Fatigue Strength, MPa 390 to 550
330
Impact Strength: V-Notched Charpy, J 34 to 35
45
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
600
Tensile Strength: Yield (Proof), MPa 610 to 860
490

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 440
400
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
49
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
2.2
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.6
Embodied Energy, MJ/kg 24
22
Embodied Water, L/kg 54
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
100
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29 to 35
21
Strength to Weight: Bending, points 25 to 28
20
Thermal Diffusivity, mm2/s 11
13
Thermal Shock Resistance, points 24 to 29
18

Alloy Composition

Aluminum (Al), % 0
0.020 to 0.060
Carbon (C), % 0.27 to 0.34
0 to 0.16
Chromium (Cr), % 1.3 to 1.7
0
Iron (Fe), % 95.7 to 97.5
96.7 to 99.98
Manganese (Mn), % 0.6 to 1.0
0 to 1.7
Molybdenum (Mo), % 0.3 to 0.5
0 to 0.2
Nickel (Ni), % 0
0 to 0.3
Niobium (Nb), % 0
0 to 0.050
Nitrogen (N), % 0
0 to 0.025
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.6
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0 to 0.050
Vanadium (V), % 0.050 to 0.15
0 to 0.12