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Chrome Moly Plate Home Page BS 1501 BS 1501 620B | BS 1501 621B | BS 1501 622B |
Grade 620B is an older British Standard for pressure vessel grade chrome moly steel which has now been superseded by EN10028.
Although now out of date, many of our customers still refer to 620B so we have included details on our website – please note that this information is solely for cross references purposes and you should consider material to current standards.
Like all our chrome molybdenum steel plates, the material specification has increased molybdenum which makes the steel effective in elevated temperature service coupled with excellent corrosion resistance due to the level of chromium content.
Chemical Composition
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni | Others |
| 620B | 0.09/0.18 | 0.15/0.40 | 0.40/0.65 | 0.025 | 0.015 | 0.80/1.15 | 0.45/0.60 | 0.30 | 0.32 |
Mechanical Properties
| Grade | Thickness | Tensile Strength | Yield Strength | Elongation (A) |
| 620B | ≤75 | 480/600 | 340 | 18 |
| >75 ≤100 | 450/570 | 280 | 16 | |
| >100 ≤150 | 430/550 | 255 | 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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