KR Grade B steel plate is common strength shipbuilding plate which is mainly used for built hull of vessels,ship body construction.Normally when rolling,Air rolled and Control Rolled is ok for ship plate KR Grade B with the thickness equal and belows 40 Millimeters,and for thickness above 40mm,the heat treatment shall be Normalised or TMCP,these two technical treatment would improve steel strength in yield and tensile points.Low temperature impacting test for KR Grade B shall be done under zero centigree when rolling.
Technical Requirements & Additional Services:
- High tension test
- Z-Test (Z15,Z25,Z35)
- Low temperature impacting test
- Ultrasonic test under ASTM A435,A577,A578
- Cetificated by ABS,LR,GL,BV,DNV,KR,NK,CCS,RINA
- Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
- Shot blasting and Painting,Cutting and welding as per end user’s demands
Techicals
Mechnical property for KR Grade B shipbuilding structual steel:
| Yield strength (≥Mpa) | Tensile strength (Mpa) | Elongation in ≥,% | |
| 235 | 400-520 | 200mm | 50mm |
| 21 | 24 | ||
Chemical composition for KR Grade B ship steel (Heat Analysis Max%)
| Main chemical elements composition of KR Grade B | ||||
| C | Si | Mn | P | S |
| 0.21 | 0.35 | 0.80 | 0.035 | 0.035 |
The Korean Register of Shipping (KRS) is a not-for-profit classification society founded in South Korea offering verification and certification services for ships and marine structures in terms of design, construction and maintenance. Founded in 1960, the society employs 889 people.[1] Its headquarters in Busan and it has 66 offices worldwide.
KRS is a full member of the International Association of Classification Societies (IACS) which is the trade association of major global classification societies.
