Chromium-Molybdenum Steel Plate for Pressure Vessels – ASTM A387 Grade 11 Class 2 / ASME SA387 Grade 11 Class 2

Chromium-Molybdenum Steel Plate for Pressure Vessels – ASTM A387 Grade 11 Class 2 / ASME SA387 Grade 11 Class 2

Chromium Molybdenum Steel – A387 Grade 11 Class 2

As a quality chrome molybdenum steel, A387 Grade 11 Class 2 is used in a variety of industries and is highly effective, particularly in the oil, gas and chemical industry, where liquids and gases are often stored at high temperature (see pressure vessels). The higher levels of chromium also provide excellent corrosion and oxidation resistance.

 

Different Grades of ASTM / ASME A387 Grade 11 Chromium Molybdenum Steel

GNEEl’s range of ASTM / ASME A387 Grade 11 chrome molybdenum steel products are available in different grades listed in the following.

  • ASTM A387 Grade 11 Class 2
  • ASME SA387 Grade 11 Class 2

 

Equivalent Grades of A387 Grade 11 Chromium Molybdenum Steel

The equivalent grades of A387 Grade 11 chrome molybdenum steel are as follows:

BS EN ASTEM/ASME DIN
621B A387-11-2

 

Chromium and Molybdenum Composition of A387 Grade 11 Chromium Molybdenum Steel

The chromium and molybdenum contents of A387 Grade 11 chrome molybdenum steel(according to the ASTM specification) are outlined in the following table.

Designation Nominal Chromium Content (%) Nominal Molybdenum Content (%)
A387 Grade 11 1.25% 0.50%

 

Tensile Requirements for A387 Grade 11 Chromium Molybdenum Class 2 Plates

The tensile requirements for A387 Grade 11 Chrome Molybdenum Class 2 plates are listed in the following table.

Designation Requirement Grade 11
A387 Grade 11 Tensile strength, ksi [MPA] 75 to 100 [515 to 690]
  Yield strength, min, ksi [MPa]/(0.2% offset) 43 [310]
  Elongation in 8 in. [200mm], min % 18
  Elongation in 2 in. [50mm], min, % 22
  Reduction of area, min %

 

Chemical Composition of A387 Grade 11 Chromium Molybdenum Steel

The chemical composition of A387 Grade 11 chrome molybdenum steel from heat and product analysis is summarised in the following table.

Element Analysis Chemical Composition (%) inc. Grade & UNS No.
    Grade 11 (UNS: K11789)
Carbon: Heat Analysis:
Product Analysis:
0.05 – 0.17
0.04 – 0.17
Manganese: Heat Analysis:
Product Analysis:
0.40 – 0.65
0.35 – 0.73
Phosphorus: Heat Analysis:
Product Analysis:
0.035
0.035
Sulphur (max): Heat Analysis:
Product Analysis:
0.035
0.035
Silicon: Heat Analysis:
Product Analysis:
0.50 – 0.80
0.44 – 0.86
Chromium: Heat Analysis:
Product Analysis:
1.00 – 1.50
0.94 – 1.56
Molybdenum: Heat Analysis:
Product Analysis:
0.45 – 0.65
0.45 – 0.70

 

ASTM A387 GRADE 22 Class 1 PVQ Plates

ASTM A387 GRADE 22 Class 1

We supply plates to global fabricators serving the oil, gas and petrochemical industry. 

These industries require a pressure vessel grade steel which works well in elevated temperatures and our material serves this purpose well. And with good corrosion and oxidation resistance, A387 Grade 22 Class 1 plates are a good option for sour gas environments too. 

 

Equivalents for ASTM A387 Grade 22 Alloy Steel Plates

BS EN ASTM/ASME DIN
622-515B 10 CRMO910 A387-22-1 10 CRMO910

 

Specifications for ASTM A387 Grade 22 Alloy Steel Plates

Chromium & Molybdenum content (according to the ASME specification)

Designation Nominal Chromium
Content (%)
Nominal Molybdenum
Content (%)
A387 Grade 22 2.25% 1.00%

 

Tensile Requirements for ASTM A387 Grade 22 Alloy Steel Plates Class 1 Plates

Designation: Requirement: Grade 22
A387 Grade 22 Tensile strength, ksi [MPA] 75 to 100 [515 to 690]
Yield strength, min, ksi [MPa]/(0.2% offset) 45 [310]
Elongation in 8 in. [200mm], min %
Elongation in 2 in. [50mm], min, % 18
Reduction of area, min % 45 (measured on round specimen)
40 (measured on flat specimen)

 

Chemical Requirements for ASTM A387 Grade 22 Alloy Steel Plates

Element Chemical Composition (%)
A387 Grade 22
Carbon: Heat Analysis: 0.05 – 0.15
Product Analysis: 0.04 – 0.15
Manganese: Heat Analysis: 0.30 – 0.60
Product Analysis: 0.25 – 0.66
Phosphorus: Heat Analysis: 0.035
Product Analysis: 0.035
Sulphur (max): Heat Analysis: 0.035
Product Analysis: 0.035
Silicon: Heat Analysis: 0.50 max
Product Analysis: 0.50 max
Chromium: Heat Analysis: 2.00 – 2.50
Product Analysis: 1.88 – 2.62
Molybdenum: Heat Analysis: 0.90 – 1.10
Product Analysis: 0.85 – 1.15

ASME SA387 and ASTM A387 Chrome Moly Plate for Boiler

ASME SA387 and ASTM A387 Chrome Moly Plate for Boiler

Most commonly used steel specifications for Chrome Moly plate are ASME SA387 and ASTM A387

  • Chemical and mechanical properties of the ASME and ASTM specifications are the same.
  • Brown McFarlane supplies Chrome Moly plates to ASME SA387 and ASTM A387 both from stock and, where required by the customer, cut to size and shape.
  • SA387 and A387 are described as a “Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum.

 

Chemical Requirements

GR. 2 GR. 12 GR. 11 GR. 22 GR. 22L GR. 21 GR. 21L GR. 5 GR. 9 GR. 91*
C 0.05-0.21 0.05-0.17 0.05-0.17 0.05-0.15 0.10 0.05-0.15 0.10 0.15 0.15 0.08-0.12
Mn 0.55-0.80 0.40-0.65 0.40-0.65 0.30-0.60 0.30-0.60 0.30-0.60 0.30-0.60 0.30-0.60 0.30-0.60 0.30-0.60
P 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.020
S 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.010
Si 0.15-0.40 0.15-0.40 0.50-0.80 0.50 0.50 0.50 0.50 0.50 1.00 0.20-0.50
Cr 0.50-0.80 0.80-1.15 1.00-1.50 2.00-2.50 2.00-2.50 2.75-3.25 2.75-3.25 4.00-6.00 8.00-10.00 8.00-9.50
Mo 0.45-0.60 0.45-0.60 0.45-0.65 0.90-1.10 0.90-1.10 0.90-1.10 0.90-1.10 0.45-0.65 0.90-1.10 0.85-1.05
V 0.04 0.18-0.25

 

Tensile Requirements

Class 1 Plates

GRADE TENSILE (MPA) YIELD (MPA) ELONG. (50MM) REDUC’N OF AREA*
2, 12 380 – 550 230 min 22% min
11 415 – 585 240 min 22% min
22, 21, 5, 9 415 – 585 205 min 18% min 40% min
21L, 22L 415 – 585 205 min 18% min 40% min

Class 2 Plates

GRADE TENSILE (MPA) YIELD (MPA) ELONG. (50 MM) REDUC’N OF AREA*
2 485 – 620 310 min 22% min
11 515 – 690 310 min 22% min
12 450 – 585 275 min 22% min
22, 21, 5, 9 515 – 690 310 min 18% min 40% min
91 585 – 760 415 min 18% min

ASTM A387 Grade 9 Class 2 Pressure Vessel Steel Plate

ASTM A387 Grade 9 Class 2 Pressure Vessel Steel Plate

A387 Grade 9 Class 2 – chrome–molybdenum plate is an ideal material for welded pressure vessels and boilers used in elevated temperature service. With excellent resistance to high temperature and corrosion, this type of steel is commonly used in the petrochemical, oil, gas and power generation industry.

All plates come with mill test certification and individual stamping. Third party testing can be arranged at the customers request.

 

Chromium & Molybdenum content (according to the ASTM specification):

Designation Nominal Chromium Content (%) Nominal Molybdenum Content (%)
A387 Grade 5 9.00% 1.00%

 

Tensile Requirements for Class 2 Plates:

Designation Requirement Grade 9
A387 Grade 9 Tensile strength, ksi [MPA] 75 to 100 [515 to 690]
  Yield strength, min, ksi [MPa]/(0.2% offset) 45 [310]
  Elongation in 8 in. [200mm], min %  
  Elongation in 2 in. [50mm], min, % 18
  Reduction of area, min % 45 (measured on round specimen)
40 (measured on flat specimen)

 

Chemical Requirements:

   
Carbon (C) %
Heat Analysis:
Product Analysis:
0.15 max
0.15 max
Manganese (Mn) %
Heat Analysis:
Product Analysis:
0.30 – 0.60
0.25 – 0.66
Phosphorus (P) %
Heat Analysis:
Product Analysis:
0.030
0.030
Sulphur (S) (Max) %
Heat Analysis:
Product Analysis:
0.030
0.030
Silicon (Si) %
Heat Analysis:
Product Analysis:
1.00 max
1.05 max
Chromium (Cr) %
Heat Analysis:
Product Analysis:
8.00 – 10.00
7.90 – 10.10
Molybdenum (Mo) %
Heat Analysis:
Product Analysis:
0.90 – 1.10
0.85 – 1.15
Vanadium (Vn) %
Heat Analysis:
Product Analysis:
0.04 max
0.05 max

ASTM A387 Grade 11 Class 2 Plates for Pressure Vessels

ASTM A387 Grade 11 Class 2 Plates for Pressure Vessels

As a quality chrome moly steel, A387 Grade 11 Class 2 is used in a variety of industries and is highly effective, particularly in the oil, gas and chemical industry, where liquids and gases are often stored at high temperature (see pressure vessels).

The higher levels of chromium also provide excellent corrosion and oxidation resistance.

Please refer to our technical specifications below for ASTM A387 Grade 11 Class 2.

 

Chromium & Molybdenum content (according to the ASTM specification):

Designation Nominal Chromium Content (%) Nominal Molybdenum Content (%)
A387 Grade 11 1.25% 0.50%

 

Tensile Requirements for Class 2 Plates

Designation Requirement Grade 11
A387 Grade 11 Tensile strength, ksi [MPA] 75 to 100 [515 to 690]
  Yield strength, min, ksi [MPa]/(0.2% offset) 43 [310]
  Elongation in 8 in. [200mm], min % 18
  Elongation in 2 in. [50mm], min, % 22
  Reduction of area, min %  

 

Chemical Requirements: 

Carbon (C) %
Heat Analysis:
Product Analysis:
0.05 – 0.17
0.04 – 0.17
Manganese (Mn) %
Heat Analysis:
Product Analysis:
0.40 – 0.65
0.35 – 0.73
Phosphorus (P) %
Heat Analysis:
Product Analysis:
0.035
0.035
Sulphur (S) (Max) %
Heat Analysis:
Product Analysis:
0.035
0.035
Silicon (Si) %
Heat Analysis:
Product Analysis:
0.50 – 0.80
0.44 – 0.86
Chromium (Cr) %
Heat Analysis:
Product Analysis:
1.00 – 1.50
0.94 – 1.56
Molybdenum (Mo) %
Heat Analysis:
Product Analysis:
0.45 – 0.65
0.45 – 0.70

(Maximum values unless stated otherwise)

ASTM A387 Steel Plate

ASTM A387 Steel Plate

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

ASTM A387/A387M specification covers chromium-molybdenum alloy steel plates for welded broilers and pressure vessels designed for elevated temperature service. Materials considered under ASTM A387/A387M specification are available in grades 2, 12, 11, 22, 22L, 21, 21L, 5, 9 and 91.
The application of SA387 in petroleum industry, chemical industry, power plant, boiler, for the production of reactor, heat exchanger, separator, tank, oil tank, liquefied gas, nuclear reactor pressure vessel, boiler, liquefied petroleum gas bottle, hydropower station high pressure pipes, turbine volute equipment and components.
ASTM A387 level (Grade) and tensile strength (CL) A387Gr.2 A387Gr.2 CL1 classification A387Gr.2 CL2 A387Gr.12 A387Gr.12 CL CL2 A387Gr.11 A387Gr.11 CL1 1 A387Gr.12 A387Gr.11 CL2 A387Gr.22 A387Gr.22 CL1 A387Gr.22 CL2 A387Gr.21 A387Gr.21 CL1 A387Gr.21 CL2 A387Gr.5 A387Gr.5 CL1 A387Gr.5 CL2 A387Gr.9 A387Gr.9 CL1 A387Gr.9 CL2 A387Gr.21L A387Gr.21l CL1 A387Gr.22L

Standard: ASTM A387
Grade : A387 Gr 11, 12, 22, 21, 5, Class 1 or 2.
Thickness : 8mm-150mm
Width : 1000mm-4000mm
Length : 1000mm-20000mm
MOQ: 1 PC
Product type : Steel plate
Delivery time : Promptly ( Stock) or 10-40 days (Production)
Payment Terms: L/C, T/T, etc
Stock : Available
MTC: Available
Delivery condition: Q+T or +N
MTC: Original