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EN 1.4988 Stainless Steel vs. S15700 Stainless Steel

Both EN 1.4988 stainless steel and S15700 stainless steel are iron alloys. They have a moderately high 90% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4988 stainless steel and the bottom bar is S15700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
200 to 460
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
1.1 to 29
Fatigue Strength, MPa 230
370 to 770
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 430
770 to 1070
Tensile Strength: Ultimate (UTS), MPa 640
1180 to 1890
Tensile Strength: Yield (Proof), MPa 290
500 to 1770

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 520
400
Maximum Temperature: Mechanical, °C 920
870
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 23
15
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 6.0
3.4
Embodied Energy, MJ/kg 89
47
Embodied Water, L/kg 150
140

Common Calculations

PREN (Pitting Resistance) 22
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
17 to 270
Resilience: Unit (Modulus of Resilience), kJ/m3 210
640 to 4660
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23
42 to 67
Strength to Weight: Bending, points 21
32 to 43
Thermal Diffusivity, mm2/s 4.0
4.2
Thermal Shock Resistance, points 14
39 to 63

Alloy Composition

Aluminum (Al), % 0
0.75 to 1.5
Carbon (C), % 0.040 to 0.1
0 to 0.090
Chromium (Cr), % 15.5 to 17.5
14 to 16
Iron (Fe), % 62.1 to 69.5
69.6 to 76.8
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 1.1 to 1.5
2.0 to 3.0
Nickel (Ni), % 12.5 to 14.5
6.5 to 7.7
Niobium (Nb), % 0.4 to 1.2
0
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 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0.6 to 0.85
0