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EN 1.4122 Stainless Steel vs. EN 1.4988 Stainless Steel

Both EN 1.4122 stainless steel and EN 1.4988 stainless steel are iron alloys. They have 85% 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 1.4122 stainless steel and the bottom bar is EN 1.4988 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 14
34
Fatigue Strength, MPa 260 to 360
230
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 480 to 520
430
Tensile Strength: Ultimate (UTS), MPa 790 to 850
640
Tensile Strength: Yield (Proof), MPa 450 to 630
290

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 400
520
Maximum Temperature: Mechanical, °C 870
920
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 10
16

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 9.5
23
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.4
6.0
Embodied Energy, MJ/kg 33
89
Embodied Water, L/kg 120
150

Common Calculations

PREN (Pitting Resistance) 20
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 93 to 110
180
Resilience: Unit (Modulus of Resilience), kJ/m3 520 to 1000
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28 to 31
23
Strength to Weight: Bending, points 25 to 26
21
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 28 to 30
14

Alloy Composition

Carbon (C), % 0.33 to 0.45
0.040 to 0.1
Chromium (Cr), % 15.5 to 17.5
15.5 to 17.5
Iron (Fe), % 77.2 to 83.4
62.1 to 69.5
Manganese (Mn), % 0 to 1.5
0 to 1.5
Molybdenum (Mo), % 0.8 to 1.3
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), % 0 to 1.0
0.3 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.015
Vanadium (V), % 0
0.6 to 0.85