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ANSWER: GMW3399 is the specification covers the requirements for continuous cast, hot rolled or cold rolled steel sheet with specified tensile strength from 450MPa through 1700MPa.
GMW3399 CR DP600 is cold rolled uncoated and coated steel coil or sheet , dual phase(ferrite+martensite) (DP) quality.
CR DP600 is dual phase quality steel. The delivery condition of CR DP600 steel can be common cold rolled( non coated), and Hot galvanized (coated).
“CR” means cold rolled, “590T” means min tensile strength is 590MPa, “340Y” means min yield strength is 340MPa.
The exact mechanical property requirements of CR DP600 is : Yield strength: 340-440 MPa, tensile strength is 590-700MPa, total Elongation in 80mm is min 21%, n value (4%+6%) is min 0.18, BH2 is min 30MPa
