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EN 1.4594 Stainless Steel vs. EN 1.4438 Stainless Steel

Both EN 1.4594 stainless steel and EN 1.4438 stainless steel are iron alloys. They have 84% 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 1.4594 stainless steel and the bottom bar is EN 1.4438 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11 to 17
41
Fatigue Strength, MPa 490 to 620
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
79
Shear Strength, MPa 620 to 700
420
Tensile Strength: Ultimate (UTS), MPa 1020 to 1170
620
Tensile Strength: Yield (Proof), MPa 810 to 1140
250

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 450
420
Maximum Temperature: Mechanical, °C 820
1000
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
14
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
22
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 3.2
4.4
Embodied Energy, MJ/kg 45
60
Embodied Water, L/kg 130
160

Common Calculations

PREN (Pitting Resistance) 19
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 190
200
Resilience: Unit (Modulus of Resilience), kJ/m3 1660 to 3320
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 36 to 41
22
Strength to Weight: Bending, points 29 to 31
20
Thermal Diffusivity, mm2/s 4.4
3.7
Thermal Shock Resistance, points 34 to 39
14

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 13 to 15
17.5 to 19.5
Copper (Cu), % 1.2 to 2.0
0
Iron (Fe), % 72.6 to 79.5
57.3 to 66.5
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 1.2 to 2.0
3.0 to 4.0
Nickel (Ni), % 5.0 to 6.0
13 to 16
Niobium (Nb), % 0.15 to 0.6
0
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015