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ASTM A387 Grade 91 Class 2 vs. K93600 Alloy

Both ASTM A387 grade 91 class 2 and K93600 alloy are iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 91 class 2 and the bottom bar is K93600 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
140
Elongation at Break, % 20
5.0 to 35
Shear Strength, MPa 420
320 to 380
Tensile Strength: Ultimate (UTS), MPa 670
480 to 810
Tensile Strength: Yield (Proof), MPa 470
280 to 750

Thermal Properties

Maximum Temperature: Mechanical, °C 600
440
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
520
Thermal Conductivity, W/m-K 26
13
Thermal Expansion, µm/m-K 13
7.3

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.4

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.1

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
21 to 280
Resilience: Unit (Modulus of Resilience), kJ/m3 580
280 to 2050
Stiffness to Weight: Axial, points 14
9.4
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 24
16 to 28
Strength to Weight: Bending, points 22
17 to 24
Thermal Diffusivity, mm2/s 6.9
3.1
Thermal Shock Resistance, points 19
34 to 57