AISI A387 Grade 22-PVQ Alloy Steel (UNS K21590)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Other Designations


Alloy steels are designated by AISI four-digit numbers. They are more susceptible to mechanical and heat treatments than carbon steels. They comprise different types of steels with compositions which exceed the limitations of B, C, Mn, Mo, Ni, Si, Cr, and Va in the carbon steels.

The datasheet given below provides more details about AISI A387 grade 22-PVQ alloy steel.

Chemical Composition

The chemical composition of AISI A387 grade 22-PVQ alloy steel is listed in the following table.

Element Content (%)
Iron, Fe 95.1 - 96.75
Chromium, Cr 2.0 - 2.50
Molybdenum, Mo 0.90 - 1.10
Silicon, Si 0.50
Manganese, Mn 0.30 - 0.60
Carbon, C 0.050 - 0.15
Phosphorous, P 0.025
Sulfur, S 0.025

Physical Properties

The following table shows the physical properties of AISI A387 grade 22-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 22-PVQ alloy steel are outlined in the following table.

Properties Metric Imperial
Tensile strength, ultimate 515 - 690 MPa 74700 - 100000 psi
Tensile strength, yield 310 MPa 45000 psi
Rupture strength (@600°C, time 3.60e+8 sec/1110°F, time 100000 hour) 38 MPa 5510 psi
Elastic modulus 190-210 GPa 27557-30458 ksi
Poisson's ratio 0.27-0.30 0.27-0.30
Elongation at break 18 % 18 %

Other Designations

Other designations that are equivalent to AISI A387 grade 22-PVQ alloy steel include the following:

  • ASTM A182 (F22-1)
  • ASTM A199 (T22)
  • ASTM A200 (T22)
  • ASTM A213 (T22)
  • ASTM A234 (WP22)
  • ASTM A250 (T22)
  • ASTM A335 (P22)
  • ASTM A336 (F22, F22a)
  • ASTM A369 (FP22)
  • ASTM A387 (22, 22L)
  • ASTM A508 (22B)
  • ASTM A542 (A, B)
  • DIN 1.7380

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