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ASTM A387 Grade 11 Steel vs. AISI 309 Stainless Steel

Both ASTM A387 grade 11 steel and AISI 309 stainless steel are iron alloys. They have 64% 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 ASTM A387 grade 11 steel and the bottom bar is AISI 309 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
180 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 25
34 to 47
Fatigue Strength, MPa 200 to 250
250 to 280
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
78
Shear Strength, MPa 320 to 390
420 to 470
Tensile Strength: Ultimate (UTS), MPa 500 to 600
600 to 710
Tensile Strength: Yield (Proof), MPa 270 to 350
260 to 350

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 430
980
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
16
Thermal Expansion, µm/m-K 13
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
19
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
3.6
Embodied Energy, MJ/kg 21
51
Embodied Water, L/kg 53
170

Common Calculations

PREN (Pitting Resistance) 3.1
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100 to 130
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 200 to 320
170 to 310
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18 to 21
21 to 25
Strength to Weight: Bending, points 18 to 20
20 to 23
Thermal Diffusivity, mm2/s 11
4.3
Thermal Shock Resistance, points 15 to 18
14 to 16

Alloy Composition

Carbon (C), % 0.050 to 0.17
0 to 0.2
Chromium (Cr), % 1.0 to 1.5
22 to 24
Iron (Fe), % 96.2 to 97.6
58 to 66
Manganese (Mn), % 0.4 to 0.65
0 to 2.0
Molybdenum (Mo), % 0.45 to 0.65
0
Nickel (Ni), % 0
12 to 15
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0.5 to 0.8
0 to 0.75
Sulfur (S), % 0 to 0.025
0 to 0.030