AISI A387 Grade 11-PVQ Alloy Steel (UNS K11789)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Other Designations


Alloy steels contain elements such as chromium, cobalt, nickel. They comprise a variety of steels with compositions that exceed the limitations of Si, Va, Cr, Ni, Mo, Mn, B and C allocated for carbon steels.

When compared to carbon steels, alloy steels are a lot more responsive to mechanical and heat treatments. Alloy steels are used in specific melting and deoxidization processes for particular kind of applications.

The following datasheet provides an overview of AISI A387 grade 11-PVQ alloy steel.

Chemical Composition

The chemical composition of AISI A387 grade 11-PVQ alloy steel is outlined in the following table.

Element Content (%)
Iron, Fe 96.16-97.6
Chromium, Cr 1.0-1.50
Silicon, Si 0.50-0.80
Manganese, Mn 0.40-0.65
Molybdenum, Mo 0.45-0.65
Carbon, C 0.050-0.17
Phosphorous, P 0.035
Sulfur, S 0.035

Physical Properties

The following table shows the physical properties of AISI A387 grade 11-PVQ alloy steel.

Properties Metric Imperial
Density 7.7-8.03 g/cm3 0.278-0.290 lb/in3

Mechanical Properties

The mechanical properties of AISI A387 grade 11-PVQ alloy steel are displayed in the following table.

Properties Metric Imperial
Tensile strength 515-690 MPa 74700-100000 psi
Yield strength 310 MPa 45000 psi
Rupture strength (@575 °C, time 3.60e+8 sec/1070 °F, time 100000 hour) 37.0 - 48.0 MPa 5370 - 6960 psi
Elastic modulus 190-210 GPa 27557-30458 ksi
Poisson's ratio 0.27-0.30 0.27-0.30
Elongation at break (In 50 mm) 22.00% 22.00%

Other Designations

Equivalent materials to AISI A387 grade 11-PVQ alloy steel include ASTM A387 (11).

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