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EN 1.7729 Steel vs. EN 1.8945 Steel

Both EN 1.7729 steel and EN 1.8945 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 32 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 1.7729 steel and the bottom bar is EN 1.8945 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
170
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
16
Fatigue Strength, MPa 500
260
Impact Strength: V-Notched Charpy, J 46
30
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 560
350
Tensile Strength: Ultimate (UTS), MPa 910
580
Tensile Strength: Yield (Proof), MPa 750
390

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 430
420
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
42
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
2.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.3
1.5
Embodied Energy, MJ/kg 49
19
Embodied Water, L/kg 59
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
82
Resilience: Unit (Modulus of Resilience), kJ/m3 1500
410
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 32
20
Strength to Weight: Bending, points 27
20
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 27
17

Alloy Composition

Aluminum (Al), % 0.015 to 0.080
0
Arsenic (As), % 0 to 0.020
0
Boron (B), % 0.0010 to 0.010
0
Carbon (C), % 0.17 to 0.23
0 to 0.15
Chromium (Cr), % 0.9 to 1.2
0.25 to 1.4
Copper (Cu), % 0 to 0.2
0.2 to 0.6
Iron (Fe), % 94.8 to 97
95.1 to 99.5
Manganese (Mn), % 0.35 to 0.75
0 to 1.1
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0 to 0.2
0 to 0.7
Nitrogen (N), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.020
0.050 to 0.16
Silicon (Si), % 0 to 0.4
0 to 0.8
Sulfur (S), % 0 to 0.015
0 to 0.040
Tin (Sn), % 0 to 0.020
0
Titanium (Ti), % 0.070 to 0.15
0
Vanadium (V), % 0.6 to 0.8
0