Grade | Chemical Composition | ||||||||||||
C | Mn | Mo | Cr | Ni | Cu | P | S | Si | |||||
Min | Max | Min | Max | Min | Max | Min | Max | Max | Max | Max | Max | Max | |
K55 | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - |
Grade | Yield Strength | Tensile Strenth | Hardness | Allowable Hardness Variation | |||||
Min | Max | Min | Max | ||||||
Psi | Mpa | Psi | Mpa | Psi | Mpa | HRC | BHN | hrc | |
K55 | 55000 | 379 | 80000 | 552 | 95000 | 655 | - | - | - |
Source: http://www.derbosteel.com/api-5ct-k55-casing-pipe-4-1-4-inch-water-drilling-wells-btc-r2.html
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