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EN 1.4988 Stainless Steel vs. EN 1.4424 Stainless Steel

Both EN 1.4988 stainless steel and EN 1.4424 stainless steel are iron alloys. They have 90% of their average alloy composition in common. There are 33 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 1.4424 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
28
Fatigue Strength, MPa 230
350 to 370
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Shear Strength, MPa 430
520
Tensile Strength: Ultimate (UTS), MPa 640
800
Tensile Strength: Yield (Proof), MPa 290
480 to 500

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 520
420
Maximum Temperature: Mechanical, °C 920
960
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 16
12

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
7.7
Embodied Carbon, kg CO2/kg material 6.0
3.4
Embodied Energy, MJ/kg 89
46
Embodied Water, L/kg 150
140

Common Calculations

PREN (Pitting Resistance) 22
29
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
190 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 210
580 to 640
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23
29
Strength to Weight: Bending, points 21
25
Thermal Diffusivity, mm2/s 4.0
3.5
Thermal Shock Resistance, points 14
23

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.030
Chromium (Cr), % 15.5 to 17.5
18 to 19
Iron (Fe), % 62.1 to 69.5
68.6 to 72.4
Manganese (Mn), % 0 to 1.5
1.2 to 2.0
Molybdenum (Mo), % 1.1 to 1.5
2.5 to 3.0
Nickel (Ni), % 12.5 to 14.5
4.5 to 5.2
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0.060 to 0.14
0.050 to 0.1
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0.3 to 0.6
1.4 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Vanadium (V), % 0.6 to 0.85
0