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Alloy Steel Plates - ASTM A 387 GR. 11 CL. 1 / 2, ASTM A 387 GR. 12 CL. 1 / 2, ASTM A 387 GR. 22 CL. 1 / 2, ASTM A 387 GR. 5 CL. 1 / 2, DIN 17175 15Mo3 / 16Mo3, ASTM SPECIFICATION A 387 GR. 2 CL. 2 / 204 GR. A / 204. B

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ASTM A 387, ASME SA 387, is one of our most popular products. It is a low alloy pressure vessel quality steel for high temperatures. We have a wide range of plate sizes available and thicknesses range from 6 - 100mm. 

The ASME SA387 standards covers the supply of weldable chrome molybdenum alloy steel plates for pressure vessels used in elevated temperature service. 

The added molybdenum and chromium provides excellent corrosion resistance and high temperature resistance respectively. 

ASME SA387 standard plates are used by the world's leading fabricators who in turn, supply primarily to the oil and petrochemical industry. Applications for ASME SA387 include pressurised vessels, industrial boilers, heat exchangers and pipework. 

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, 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.

This specification covers molybdenum alloy steel plates, intended particularly for welded boilers and other pressure vessels. Plates under this specification are available in three grades having different strength levels: Grade A; Grade B; and Grade C. The steel shall be killed. The steel shall conform to the chemical requirements specified. Tension tests on plates shall conform to the requirements specified. Plates under this specification are available in three grades having different strength levels as follows:

Sourced from some of Western Europe's & Asia's finest steel mills, Prosaic Steel & Alloys stock a wide range of ASME SA387 Class 2 plates which are available for shipment worldwide. 

ASTM A 387, ASME SA 387, is one of our most popular products. It is a low alloy pressure vessel quality steel for high temperatures. We have a wide range of plate sizes available and thicknesses range from 6 - 100mm. 

The Following Grades Are Available:
ASTM A 387 GR. 11 CL. 1 / 2
ASTM A 387 GR. 12 CL. 1 / 2
ASTM A 387 GR. 22 CL. 1 / 2
ASTM A 387 GR. 5 CL. 1 / 2
DIN 17175 15Mo3 / 16Mo3

ASTM SPECIFICATION A 387 GR. 2   CL.  2 / 204 GR. A / 204. B

Chemical Composition of Sheets/ Plates
ASTM Grade C
max
Mn
max
P
max
S
max
Si
max
Ni Cr Mo Pipe Fittingss
A387 Class 1 Class 2 5 0.15 0.30-0.60 0.04 0.03 0.5   4.00-6.00 0.45-0.65  
  9 0.15 0.30-3.60 0.03 0.3 1   8.00-10.0 0.90-1.10  
  11 0.04-0.17 0.40-0.65 0.04 0.04 0.50-0.80   1.00-1.50 0.45-0.65  
  12 0.04-0.17 0.40-0.65 0.04 0.04 0.15-0.40   0.80-1.15 0.45-0.60  
  22 0.05-0.17 0.30-0.60 0.04 0.035 0.5   2.00-2.50 0.90-1.10  

  Mechanical Requirements Hardness
ASTM Grade Tensile Strength Apa (ksi) min Yield Strength Mpa (ksi)min   Elongation min% Brinel max HB Rockwell max HRB
    Class 1 Class 2 Class1 Class2      
A387 Class 1 Class 2 5 415-585 515-690 205 310 18 202 92
9 415-585 515-690 205 310 18 217 95
11 415-585 515-690 240 310 22 217 95
12 380-550 450-585 230 275 22 217 95
22 415-585 515-690 205 310 18 201 92

Alloy Steel Plate SA 387 Grade 11 Exporters
ASME SA / ASTM A 387 Grade 11 Class 1 / 2
ASME SA / ASTM A 387 Grade 12 Class 1 / 2
ASME SA / ASTM A 387 Grade 22 Class 1 / 2
ASME SA / ASTM A 387 Grade 91 Class 1 / 2
ASME SA / ASTM A 387 Grade 5 Class 1 / 2
ASME SA / ASTM A 387 Grade 9 Class 1 / 2
ASME SA / ASTM A 387 Grade 11 Class 1 / 2



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