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S17700 Stainless Steel vs. ASTM A387 Grade 2 Steel

Both S17700 stainless steel and ASTM A387 grade 2 steel are iron alloys. They have 75% of their average alloy composition in common. There are 32 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 S17700 stainless steel and the bottom bar is ASTM A387 grade 2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 430
140 to 170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 1.0 to 23
25
Fatigue Strength, MPa 290 to 560
190 to 250
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 740 to 940
300 to 350
Tensile Strength: Ultimate (UTS), MPa 1180 to 1650
470 to 550
Tensile Strength: Yield (Proof), MPa 430 to 1210
260 to 350

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 890
420
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
45
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 13
2.6
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.8
1.6
Embodied Energy, MJ/kg 40
20
Embodied Water, L/kg 150
50

Common Calculations

PREN (Pitting Resistance) 17
2.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 15 to 210
98 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 3750
180 to 320
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 42 to 59
16 to 20
Strength to Weight: Bending, points 32 to 40
17 to 19
Thermal Diffusivity, mm2/s 4.1
12
Thermal Shock Resistance, points 39 to 54
14 to 16

Alloy Composition

Aluminum (Al), % 0.75 to 1.5
0
Carbon (C), % 0 to 0.090
0.050 to 0.21
Chromium (Cr), % 16 to 18
0.5 to 0.8
Iron (Fe), % 70.5 to 76.8
97.1 to 98.3
Manganese (Mn), % 0 to 1.0
0.55 to 0.8
Molybdenum (Mo), % 0
0.45 to 0.6
Nickel (Ni), % 6.5 to 7.8
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0.15 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.025

Comparable Variants