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EN 1.4941 Stainless Steel vs. EN 1.4434 Stainless Steel

Both EN 1.4941 stainless steel and EN 1.4434 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have a moderately high 95% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4941 stainless steel and the bottom bar is EN 1.4434 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
41
Fatigue Strength, MPa 180
270
Impact Strength: V-Notched Charpy, J 98
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
79
Shear Strength, MPa 400
450
Tensile Strength: Ultimate (UTS), MPa 590
660
Tensile Strength: Yield (Proof), MPa 210
310

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 520
420
Maximum Temperature: Mechanical, °C 940
980
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 16
21
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.3
4.2
Embodied Energy, MJ/kg 47
57
Embodied Water, L/kg 140
160

Common Calculations

PREN (Pitting Resistance) 18
32
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
220
Resilience: Unit (Modulus of Resilience), kJ/m3 110
240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
23
Strength to Weight: Bending, points 20
21
Thermal Diffusivity, mm2/s 4.3
4.0
Thermal Shock Resistance, points 13
15

Alloy Composition

Boron (B), % 0.0015 to 0.0050
0
Carbon (C), % 0.040 to 0.080
0 to 0.030
Chromium (Cr), % 17 to 19
16.5 to 19.5
Iron (Fe), % 65.1 to 73.6
59.2 to 69.9
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 9.0 to 12
10.5 to 14
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0.4 to 0.8
0