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EN 1.4729 Stainless Steel vs. EN 1.4988 Stainless Steel

Both EN 1.4729 stainless steel and EN 1.4988 stainless steel are iron alloys. They have 81% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 1.4729 stainless steel and the bottom bar is EN 1.4988 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 15
34
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 390
520
Maximum Temperature: Mechanical, °C 850
920
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 24
15
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
23
Density, g/cm3 7.6
7.9
Embodied Carbon, kg CO2/kg material 2.1
6.0
Embodied Energy, MJ/kg 29
89
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 14
22
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Thermal Diffusivity, mm2/s 6.5
4.0

Alloy Composition

Carbon (C), % 0.3 to 0.5
0.040 to 0.1
Chromium (Cr), % 12 to 14
15.5 to 17.5
Iron (Fe), % 80.4 to 86.7
62.1 to 69.5
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 0 to 0.5
1.1 to 1.5
Nickel (Ni), % 0 to 1.0
12.5 to 14.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0
0.060 to 0.14
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 1.0 to 2.5
0.3 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.015
Vanadium (V), % 0
0.6 to 0.85