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EN 1.4971 Stainless Steel vs. EN 1.4988 Stainless Steel

Both EN 1.4971 stainless steel and EN 1.4988 stainless steel are iron alloys. They have 64% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4971 stainless steel and the bottom bar is EN 1.4988 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
190
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 34
34
Fatigue Strength, MPa 270
230
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 81
77
Shear Strength, MPa 530
430
Tensile Strength: Ultimate (UTS), MPa 800
640
Tensile Strength: Yield (Proof), MPa 340
290

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 570
520
Maximum Temperature: Mechanical, °C 1100
920
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 15
16

Otherwise Unclassified Properties

Base Metal Price, % relative 70
23
Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 7.6
6.0
Embodied Energy, MJ/kg 110
89
Embodied Water, L/kg 300
150

Common Calculations

PREN (Pitting Resistance) 38
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
180
Resilience: Unit (Modulus of Resilience), kJ/m3 280
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
23
Strength to Weight: Bending, points 23
21
Thermal Diffusivity, mm2/s 3.4
4.0
Thermal Shock Resistance, points 19
14

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.040 to 0.1
Chromium (Cr), % 20 to 22.5
15.5 to 17.5
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
62.1 to 69.5
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.5 to 3.5
1.1 to 1.5
Nickel (Ni), % 19 to 21
12.5 to 14.5
Niobium (Nb), % 0.75 to 1.3
0.4 to 1.2
Nitrogen (N), % 0.1 to 0.2
0.060 to 0.14
Phosphorus (P), % 0 to 0.035
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
Tungsten (W), % 2.0 to 3.0
0
Vanadium (V), % 0
0.6 to 0.85