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Chrome Moly Plate Home Page BS 1501 BS 1501 620B | BS 1501 621B | BS 1501 622B |
Grade 621B has long been superseded by EN10028 but as our clients still make reference to this chrome moly grade, we have included details here, which should be used for cross reference purposes.
621B is a chrome moly steel for use in pressurised vessels and boilers found commonly in the oil and gas industry. The material has good tensile and yield strength and is designed to operate in higher working temperatures. 621B has good weldability and corrosion resistance.
Please refer to the technical information below for this particular steel grade...
Chemical Composition
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni | Others |
| 621B | 0.09/0.17 | 0.50/0.80 | 0.40/0.65 | 0.025 | 0.015 | 1.00/1.50 | 0.45/0.60 | 0.30 | 0.32 |
Mechanical Properties
| Grade | Thickness | Tensile Strength | Yield Strength | Elongation (A) |
| 621B | ≤75 | 515/690 | 340 | 18 |
| >75 ≤100 | 500/670 | 320 | 16 | |
| >100 ≤150 | 490/650 | 310 | 16 |
For more information about our chrome molybdenum steel plates please click here to contact us.
Equivalent Grades :
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Masteel UK Limited,
The Cedars, Coton Road,
Nether Whitacre, Coleshill,
Birmingham, West Midlands
B46 2HH
t: +44 (0)1675 437733
f: +44 (0)1675 437734
email: enquiries@masteel.co.uk
website: www.masteel.co.uk
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