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EN 1.7729 Steel vs. EN 1.4309 Stainless Steel

Both EN 1.7729 steel and EN 1.4309 stainless steel are iron alloys. They have 71% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, 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 1.4309 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
140
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17
34
Fatigue Strength, MPa 500
170
Impact Strength: V-Notched Charpy, J 46
90
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 910
490
Tensile Strength: Yield (Proof), MPa 750
210

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 430
960
Melting Completion (Liquidus), °C 1470
1420
Melting Onset (Solidus), °C 1430
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.3
3.1
Embodied Energy, MJ/kg 49
45
Embodied Water, L/kg 59
150

Common Calculations

PREN (Pitting Resistance) 4.4
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
140
Resilience: Unit (Modulus of Resilience), kJ/m3 1500
110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 32
18
Strength to Weight: Bending, points 27
18
Thermal Diffusivity, mm2/s 11
4.1
Thermal Shock Resistance, points 27
11

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 0.030
Chromium (Cr), % 0.9 to 1.2
18 to 20
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 94.8 to 97
64.2 to 73
Manganese (Mn), % 0.35 to 0.75
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0 to 0.2
9.0 to 12
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.020
0 to 0.035
Silicon (Si), % 0 to 0.4
0 to 1.5
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