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EN 1.4594 Stainless Steel vs. EN 1.4634 Stainless Steel

Both EN 1.4594 stainless steel and EN 1.4634 stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4594 stainless steel and the bottom bar is EN 1.4634 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11 to 17
21
Fatigue Strength, MPa 490 to 620
180
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 620 to 700
340
Tensile Strength: Ultimate (UTS), MPa 1020 to 1170
540
Tensile Strength: Yield (Proof), MPa 810 to 1140
280

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 450
500
Maximum Temperature: Mechanical, °C 820
900
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 16
21
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 15
13
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 3.2
2.9
Embodied Energy, MJ/kg 45
42
Embodied Water, L/kg 130
140

Common Calculations

PREN (Pitting Resistance) 19
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 190
93
Resilience: Unit (Modulus of Resilience), kJ/m3 1660 to 3320
200
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 36 to 41
20
Strength to Weight: Bending, points 29 to 31
19
Thermal Diffusivity, mm2/s 4.4
5.8
Thermal Shock Resistance, points 34 to 39
19

Alloy Composition

Aluminum (Al), % 0
0.2 to 1.5
Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 13 to 15
17.5 to 18.5
Copper (Cu), % 1.2 to 2.0
0 to 0.5
Iron (Fe), % 72.6 to 79.5
74.9 to 81.8
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 1.2 to 2.0
0 to 0.5
Nickel (Ni), % 5.0 to 6.0
0 to 0.5
Niobium (Nb), % 0.15 to 0.6
0.3 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.050
Silicon (Si), % 0 to 0.7
0.2 to 1.5
Sulfur (S), % 0 to 0.015
0 to 0.050