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EN 1.7390 Steel vs. AISI 429 Stainless Steel

Both EN 1.7390 steel and AISI 429 stainless steel are iron alloys. They have 90% of their average alloy composition in common. There are 33 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 1.7390 steel and the bottom bar is AISI 429 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 16
25
Fatigue Strength, MPa 310
180
Poisson's Ratio 0.29
0.28
Reduction in Area, % 50
50
Shear Modulus, GPa 74
77
Shear Strength, MPa 440
300
Tensile Strength: Ultimate (UTS), MPa 710
480
Tensile Strength: Yield (Proof), MPa 480
260

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 510
810
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
26
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
7.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.7
2.0
Embodied Energy, MJ/kg 23
28
Embodied Water, L/kg 69
110

Common Calculations

PREN (Pitting Resistance) 6.8
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
99
Resilience: Unit (Modulus of Resilience), kJ/m3 600
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
17
Strength to Weight: Bending, points 23
18
Thermal Diffusivity, mm2/s 11
6.9
Thermal Shock Resistance, points 20
17

Alloy Composition

Carbon (C), % 0 to 0.18
0 to 0.12
Chromium (Cr), % 4.0 to 6.0
14 to 16
Iron (Fe), % 91.9 to 95.3
81.8 to 86
Manganese (Mn), % 0.3 to 0.8
0 to 1.0
Molybdenum (Mo), % 0.45 to 0.65
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030