SA387 Gr22 Class 2; A387-22-2 Chromium Molybdenum Steel Plate

SA387 Gr22-2 ; A387-22 Class 2 Chrom Moly Pressure Vessel Steel Plates

ASME SA387 Gr22 Cl 2 and ASTM A387 Gr22 Class 2 are 2.25% chromium – 1% Molybdenum and you can find out more effective working temperature up to 600°C, these Chromium and Molybdenum pressure vessel steel plates can effectively works very well in elevated temperatures with minimum aging of the product after thousands of hours of work.

The Molybdenum component in the SA387 ; A387 alloy, as well as increasing the tensile strength at high temperatures, also provides high resistance against oxidation and corrosion by increasing the lattice strain of the steel structure, this effectively stops the corrosive agents from dissolving the iron out of the steel structure, good for heat-resistant pressure vessels and good option for sour gas environments.

ASTM A387 Gr 22-2 and ASME SA387-22-2 steel is characterised by good weldability. These types of steel are used above all for manufacturing boilers, pressure vessels and pipes for the transportation of hot liquids. They also offer good properties at high and low temperatures. The product is always supplied in the normalised and tempered condition.

This steel grade steel plates are commonly being addressed as A387-22-2 ; SA387 Gr22-2; SA387 Gr22 Cl2; A387-22 Cl2, Chromium and Molybdenum pressure vessel steel plates; chrome moly pressure vessel plates and etc....

Popular Uses

SA387 Chrome Moly steel plates are popular used by power plant and dignity health medical foundation oil and gas industries in the production facilities because of the alloy’s key properties.

High Tensile Strength at High Temperatures

A387 Chrome Moly steel has a much higher heat resistance than other carbon steels and it is thus exceptionally useful for applications where hot fluids or gases are being processed at high temperatures.

The chromium and the molybdenum are the key alloying elements. They provide many of the properties of stainless steel at a reduced costs. (typically A387 alloy steel has 0.5% to 5% Chromium content as opposed to 16% in stainless steel)

10 Grades of SA387; A387 Chromium Molybdenum Steel Plate

There are 10(ten) grades of Chromium Molybdenum steel plate (A387) 2,12, 11, 22, 22L, 21, 21L, 9 and 91 specified by ASTM/ASME, all Chrome Moly plates are killed and thermally treated as required by ASTM A387 which also specifies minimum and maximum quantities of the following elements in the steel: chemical requirements for carbon, manganese, phosphorus, sulfur, silicon, chromium, molybdenum, nickel, vanadium, columbium, boron, nitrogen, aluminum, titanium, and zirconium.

A387 plate has to undergo product, chemical and tensile testing (which is documented in the MTC or material test certificate) – with specific requirements that have to be met for tensile strength, yield strength, and elongation.


A387 Grade 22 Class 2

Type of Steel


Requirements for Delivery


Tensile Strength (ksi) MPa

(75/100) 515 to 690

Yield Strength (Min. ksi) Min.MPa

(Yield Point if designated YP)

(45) 310

Spec. Thickness (Max. in.)


Thickness (Max.)

12* inches or 304.8mm

Chemical Composition (%)

Unless a range is specified, individual values are maximums

















Other Elements


Heat Treatment Required


* Consult us for plates over thickness listed.

**Consult us for other A387 grades not listed.

■ Restricted to ASTM A20 limits for unspecified elements.

A387 Gr 22 Class 2 in Ex-Stock

ASTM A 387, ASME SA 387, is one of our major pressure vessel steel products in ex-stock, we have a wide range of plate sizes available and causes of erectile dysfunction thicknesses range from 6 – 100mm from the origin of Korea, Japan, Western European, Eastern European, USA and China. has number of pages of detailed information about SA387 ; A387 chrome moly steel, as well as a number of supplementary pages around the site that provide further information.

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