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EN 1.4034 Stainless Steel vs. EN 1.8509 Steel

Both EN 1.4034 stainless steel and EN 1.8509 steel are iron alloys. They have 88% of their average alloy composition in common. There are 31 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 1.4034 stainless steel and the bottom bar is EN 1.8509 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 14
11
Fatigue Strength, MPa 230 to 400
580
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 420 to 540
680
Tensile Strength: Ultimate (UTS), MPa 690 to 900
1130
Tensile Strength: Yield (Proof), MPa 390 to 730
940

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 770
440
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 30
39
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.7
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
2.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.6
Embodied Energy, MJ/kg 27
22
Embodied Water, L/kg 100
65

Common Calculations

PREN (Pitting Resistance) 14
2.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 81 to 94
120
Resilience: Unit (Modulus of Resilience), kJ/m3 400 to 1370
2340
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 32
40
Strength to Weight: Bending, points 22 to 27
31
Thermal Diffusivity, mm2/s 8.1
10
Thermal Shock Resistance, points 24 to 32
33

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0.43 to 0.5
0.38 to 0.45
Chromium (Cr), % 12.5 to 14.5
1.5 to 1.8
Iron (Fe), % 83 to 87.1
95.5 to 97.1
Manganese (Mn), % 0 to 1.0
0.4 to 0.7
Molybdenum (Mo), % 0
0.2 to 0.35
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035