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EN 1.7729 Steel vs. EN 1.4411 Stainless Steel

Both EN 1.7729 steel and EN 1.4411 stainless steel are iron alloys. Both are furnished in the quenched and tempered condition. They have 79% of their average alloy composition in common. There are 31 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 1.7729 steel and the bottom bar is EN 1.4411 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17
17
Fatigue Strength, MPa 500
370
Impact Strength: V-Notched Charpy, J 46
68
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Tensile Strength: Ultimate (UTS), MPa 910
870
Tensile Strength: Yield (Proof), MPa 750
600

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 430
880
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
13
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.3
3.0
Embodied Energy, MJ/kg 49
41
Embodied Water, L/kg 59
130

Common Calculations

PREN (Pitting Resistance) 4.4
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
130
Resilience: Unit (Modulus of Resilience), kJ/m3 1500
920
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 32
31
Strength to Weight: Bending, points 27
26
Thermal Diffusivity, mm2/s 11
4.6
Thermal Shock Resistance, points 27
28

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 0.060
Chromium (Cr), % 0.9 to 1.2
15 to 17
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 94.8 to 97
73.1 to 79.5
Manganese (Mn), % 0.35 to 0.75
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
1.5 to 2.0
Nickel (Ni), % 0 to 0.2
4.0 to 6.0
Phosphorus (P), % 0 to 0.020
0 to 0.035
Silicon (Si), % 0 to 0.4
0 to 0.8
Sulfur (S), % 0 to 0.015
0 to 0.025
Tin (Sn), % 0 to 0.020
0
Titanium (Ti), % 0.070 to 0.15
0
Vanadium (V), % 0.6 to 0.8
0