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ASTM A387 Grade 22 Class 2 Pressure Vessel Steel PLATE
1.Chrome Moly Plate
ASTM A387
ASTM A387 Grade 5 Class 2 | ASTM A387 Grade 9 Class 2 | ASTM A387 Grade 11 Class 2
ASTM A387 Grade 12 Class 2 | ASTM A387 Grade 22 Class 2 | ASTM A387 Grade 91 Class 2
2.A387 Grade 22 Class 2 chrome moly plates for pressure vessels and industrial boilers.A387 Grade 22 Class 2 is a grade of chromium-molybdenum alloy intended primarily for use fabricators in welded boilers and pressure vessels which are designed for use in raised temperature service.
3.With excellent heat resistance and anti corrosive/oxidation qualities, this steel grade is ideal for use in the chemical, oil and gas industry.
4.Equivalents
|
BS |
EN |
ASTM/ASME |
DIN |
|
622-515B |
10 CRMO910 |
A387-22-2 |
10 CRMO910 |
5.Specifications
Chromium & Molybdenum content (according to the ASTM specification):
|
Designation |
Nominal Chromium |
Nominal Molybdenum |
|
A387 Grade 22 |
2.25% |
1.00% |
6.Tensile Requirements for Class 2 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) |
7.Chemical Requirements
|
Element |
|
Chemical Composition (%) inc. Grade & UNS No. |
|
|
|
Grade 22 (UNS: K21590) |
|
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 |
8.Tension Test Requirements:
We shall be tested using a test specimen will confirm to the tensile requirements as outlined in Table 2.
9.Other requirements:
The following requirements and testing procedures (which are not mandatory) are considered suitable for Chrome Molybdenum steel:
Vacuum treatment
Product Analysis
Additional Tension Test
Charpy V-Notch Impact Test
Drop Weight Test
High Temperature Tension Test
Ultrasonic Examination
Magnetic Particle Examination
10.To find out more about our's services and ASTM A387 Grade 22 Class 2 steel plates which we can supply directly to you from stock or from the mill, Please to contact us.
