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EN 1.4988 Stainless Steel vs. EN 1.4594 Stainless Steel

Both EN 1.4988 stainless steel and EN 1.4594 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4988 stainless steel and the bottom bar is EN 1.4594 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
11 to 17
Fatigue Strength, MPa 230
490 to 620
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 430
620 to 700
Tensile Strength: Ultimate (UTS), MPa 640
1020 to 1170
Tensile Strength: Yield (Proof), MPa 290
810 to 1140

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 520
450
Maximum Temperature: Mechanical, °C 920
820
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 16
11

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 23
15
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 6.0
3.2
Embodied Energy, MJ/kg 89
45
Embodied Water, L/kg 150
130

Common Calculations

PREN (Pitting Resistance) 22
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
110 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 210
1660 to 3320
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23
36 to 41
Strength to Weight: Bending, points 21
29 to 31
Thermal Diffusivity, mm2/s 4.0
4.4
Thermal Shock Resistance, points 14
34 to 39

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.070
Chromium (Cr), % 15.5 to 17.5
13 to 15
Copper (Cu), % 0
1.2 to 2.0
Iron (Fe), % 62.1 to 69.5
72.6 to 79.5
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 1.1 to 1.5
1.2 to 2.0
Nickel (Ni), % 12.5 to 14.5
5.0 to 6.0
Niobium (Nb), % 0.4 to 1.2
0.15 to 0.6
Nitrogen (N), % 0.060 to 0.14
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.3 to 0.6
0 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.015
Vanadium (V), % 0.6 to 0.85
0