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EN 1.4658 Stainless Steel vs. EN 1.4434 Stainless Steel

Both EN 1.4658 stainless steel and EN 1.4434 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 87% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4658 stainless steel and the bottom bar is EN 1.4434 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
200
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 28
41
Fatigue Strength, MPa 530
270
Impact Strength: V-Notched Charpy, J 110
90
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 81
79
Shear Strength, MPa 580
450
Tensile Strength: Ultimate (UTS), MPa 900
660
Tensile Strength: Yield (Proof), MPa 730
310

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 460
420
Maximum Temperature: Mechanical, °C 1100
980
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 25
21
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 4.5
4.2
Embodied Energy, MJ/kg 61
57
Embodied Water, L/kg 200
160

Common Calculations

PREN (Pitting Resistance) 49
32
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
220
Resilience: Unit (Modulus of Resilience), kJ/m3 1280
240
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32
23
Strength to Weight: Bending, points 26
21
Thermal Diffusivity, mm2/s 4.3
4.0
Thermal Shock Resistance, points 24
15

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 26 to 29
16.5 to 19.5
Cobalt (Co), % 0.5 to 2.0
0
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 50.9 to 63.7
59.2 to 69.9
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 4.0 to 5.0
3.0 to 4.0
Nickel (Ni), % 5.5 to 9.5
10.5 to 14
Nitrogen (N), % 0.3 to 0.5
0.1 to 0.2
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.015