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Alloy Steel Plates

Alloy Steel Plates


Cr Mo Alloy Steel Plates Suppliers, Exporters-Call Us Now!

“Yes, It’s in Stock and Ready to Deliver”

High Quality, Lower Cost But The Best Service in Steel Plates

An ISO 9001:2008 Certified Company, Metline Industries is a full line distributor, processor and supplier of alloy steel plates in one of the most popular pressure vessel grade ASME SA387 or ASTM A387. We can supply cut to size Chrome Moly steel plates, with both narrow and wide widths. Our stock of alloy steel plates includes thickness of 3mm up to 100mm with width of 1500mm, 2000mm, and 2500mm.


An ISO 9001:2008 Certified Company, Metline Industries is an international distributor and supplier of Cr Mo Alloy Steel Plates (ASTM A 387 Grade 11/22 Class 2). Metline Industries stocks an extensive range of high quality alloy steel plates for manufacturing pressure vessels and industrial boilers for the petroleum, petrochemical and chemical processing industries. Two of the most popular pressure vessel steel grades include ASME SA 516 (ASTM A516) carbon steel and ASME SA 387 (ASTM A387) alloy steel. Thicknesses available in range from 3 mm up to as thick as 100 mm, although thicker plates might be manufactured under special order.

ASTM A387 / A387M – Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum

This specification covers chromium-molybdenum alloy steel plates for welded boilers and pressure vessels designed for elevated temperature service. Materials considered under this specification are available in grades 2, 12, 11, 22, 22L, 21, 21L, 5, 9 and 91. The steel materials shall be killed and shall be thermally treated. The steel specimens shall undergo heat analysis and product analysis and shall conform to the chemical requirements for carbon, manganese, phosphorus, sulfur, silicon, chromium, molybdenum, nickel, vanadium, columbium, boron, nitrogen, aluminum, titanium, and zirconium. The steel specimens shall also undergo tension tests and shall conform to the required values of tensile strength, yield strength, and elongation.

Cr Mo Steel Plates, Alloy Steel Plates ASTM A387 Chemical Composition

Grade 50.15 max0.3 – 0.60.0350.030.5 max4.00 – 6.000.45 – 0.65
Grade 90.15 max0.30 – max8.0 – 10.00.9 – 1.1
Grade 110.05 – 0.170.4 – 0.650.0350.0350.5 – 0.801.0 – 1.50.45 – 0.65
Grade 120.05 – 0.170.4 – 0.650.0350.0350.15 – 0.40.8 – 1.150.45 – 0.6
Grade 220.05 – 0.150.3 – 0.60.0350.0350.5 max2.0 – 2.50.9 – 1.1

Cr Mo Steel Plates, Alloy Steel Plates ASTM A387 Mechanical Properties

 Tensile Strength


Tensile Strength


Yield Strength


Yield Strength (MPa)Elongation

in 2 inches (%)

A 387 Grade 5Class 160-85415-5853020518
Class 275-100515-6904531018
A 387 Grade 9Class 160-85415-5853020518
Class 275-100515-6904531018
A 387 Grade 11Class 160-85415-5853524022
Class 270-90485-6204531022
A 387 Grade 12Class 150-80380-5503323022
Class 265-85450-5854027522
A 387 Grade 22Class 160-85415-5853020518
Class 275-100515-6904531018

Comparable Alloy Steel Plate Specifications, Pipe Specifications and Forging Specifications

Plate GradeForging/Flange Grade A182Pipes Grade ASTM A335
BSEN10028-2 16M03F1P1
ASTM A387-12-2F12-2P12
ASTM A387-11-2F11-2P11
ASTM A387-22-2F22P22
ASTM A387-5-2F5P5
ASTM A387-91-2F9P91

Additional information

Main Alloy Steel Grades

ASTM A387 GRade 22 Class 2, ASTM A387 Grade 11 Class 2


50 kg's to Production Qty's

Delivery time

Promptly (Stock) or 10-40 days (Production)




Mill TC EN 10204 3.1, Third Party Inspection, NDT/DT Test Reports

Latest Prices

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