HCT780X 是一種雙相高強度冷軋汽車用鋼板鋼,其化學成分和機械性能如下:
等效鋼號是：HC420/780DPD+Z，HC420/780DPD+ZF，HC420/780DP，B400/780DP，B400/780DP，HCT780X，CR780T/420Y-DP，DP 780T/420Y....等。
HCT780X ( 1.0943 )， Grade : HCT780X， Number: 1.0943， Classification: Alloy quality steel
EN 10336: 2006 Continuously hot-dip coated and electrolytically coated strip and sheet of multiphase steels for cold forming. Technical delivery conditions
EN 10346: 2009 Continuously hot-dip coated steel flat products. Technical delivery conditions
HC420/780DPD+Z，HC420/780DPD+ZF，HC420/780DP，B400/780DP，B400/780DP，HCT780X，CR780T/420Y-DP，DP 780T/420Y
C，Si，Mn，P，S，V，Al，B，-max 0.18，max 0.8，max 2.5，max 0.08，max 0.015，max 0.2，max 2，max 0.005，Cr+Mo < 1, Nb+Ti < 0.15
Rm - Tensile strength (MPa)780
Rp0.2 0.2% proof strength (MPa)450-560
A - Min. elongation Lo = 80 mm (%)14
ReHMinimum yield strength / Mindestwert der oberen Streckgrenze / Limite d elasticite minimale
RmTensile strength / Zugfestigkeit / Resistance a la traction
AMinimum elongation / Mindestwert der Bruchdehnung / Allongement minimal
JNotch impact test / Kerbschlagbiegeversuch / Essai de flexion par choc
+ASoft annealed
+ACAnnealed to achieve spheroidization of the carbides
+ARAs rolled
+ATSolution annealed
+CCold drawn / hard
+CRCold rolled
+FPTreated to ferrite-pearlite structure and hardness range
+IIsothermal annealing
+LCCold drawn / soft
+MThermo mechanical rolling
+NNormalized
+NTNormalized and tempered
+PPrecipitation hardened
+PEPeeled
+QAAir quenched and tempered
+QLLiquid quenched and tempered
+QTQuenched and tempered
+STreated to improve shearability
+SHAs rolled and turned
+SRCold drawn and stress relieved
+TTempered
+THTreated to hardness range
+WWWarm worked
+UUntreated
Chemical composition of steel HCT780X (1.0943), Standards of steel HCT780X (1.0943)
Mechanical Properties of steel HCT780X (1.0943) steel HCT780X (1.0943) Tensile Strength, Elongation, Proof strength , Hardness
具體體參數 請下載：
HCT780X .pdf 這個文件查看。
EN 10346-HCT780X
化學成分 C ≦0.18 Si ≦0.80 Mn ≦2.50
P≦0.080 S ≦0.015 Al 0.015-2.0
Cr + Mo ≦ 1,40 Nb+Ti ≦ 0.15
V ≦ 0.20 B ≦ 0.005
機械性能 屈服強度440-550
抗拉強度780
斷后延伸率14%
EN 10346-HCT980X
化學成分 C ≦0.20 Si ≦1.00 Mn ≦2.90
P≦0.080 S ≦0.015 Al 0.015-2.0
Cr + Mo ≦ 1,40 Nb+Ti ≦ 0.15
V ≦ 0.20 B ≦ 0.005
機械性能 屈服強度590-740
抗拉強度980
斷后延伸率10%
EN 10346-HCT980XG a
化學成分 C ≦0.23 Si ≦1.00 Mn ≦2.90
P≦0.080 S ≦0.015 Al 0.015-2.0
Cr + Mo ≦ 1,40 Nb+Ti ≦ 0.15
V ≦ 0.20 B ≦ 0.005
機械性能 屈服強度700-850
抗拉強度980
斷后延伸率8%
EN 10346-HCT690T
化學成分 C ≦0.24 Si ≦2.00 Mn ≦2.20
P≦0.080 S ≦0.015 Al 0.015-2.0
Cr + Mo ≦ 0.60 Nb+Ti ≦ 0.20
V ≦ 0.20 B ≦ 0.005
機械性能 屈服強度400-520
抗拉強度360
斷后延伸率23%
中國的本鋼和寶鋼等鋼廠可以生產些種鋼號:HC420/780DPD+Z,HC420/780DPD+ZF，HC420/780DPD+Z，HC420/780DPD+ZF，HC420/780DP，B400/780DP，B400/780DP，HCT780X，CR780T/420Y-DP，DP 780T/420Y
Q-BQB 420-2009 連續熱鍍鋅+鋅鐵合金鍍層鋼板及鋼帶.pdf
Q-BQB 418-2009 雙相高強度冷連軋鋼板及鋼帶.pdf
