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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 DP1000 is cold rolled uncoated and coated steel coil or sheet , dual phase(ferrite+martensite) (DP) quality.
CR DP1000 is dual phase quality steel. The delivery condition of CR DP1000 steel can be common cold rolled( non coated), and Hot galvanized (coated).
“CR” means cold rolled, “980T” means min tensile strength is 980MPa, “550Y” means min yield strength is 550MPa.
The exact mechanical property requirements of CR DP1000 is : Yield strength: 550-700MPa, tensile strength is 980-1130MPa, total Elongation in 80mm is min 8.0%, n value (4%+6%) is min 0.08, BH2 is min 30MPa
