HCT780X 是什么钢?对应国标什么钢号?
HCT780X 是一种双相高强度冷轧汽车用钢板钢,其化学成分和机械性能如下:
等效钢号是：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
Standard:
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
Equivalent grades:
HC420/780DPD+Z，HC420/780DPD+ZF，HC420/780DP，B400/780DP，B400/780DP，HCT780X，CR780T/420Y-DP，DP 780T/420Y
Chemical composition % of steel HCT780X (1.0943): EN 10336-2006
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
Mechanical properties of steel HCT780X (1.0943)
Rm - Tensile strength (MPa)780
Rp0.2 0.2% proof strength (MPa)450-560
A - Min. elongation Lo = 80 mm (%)14
Mechanical properties
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
Heat treatment conditions
+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
Alloy quality steel
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
具体体参数 请下载：
HCT780X .pdf 这个文件查看。
更多同标准钢号:
EN 10346-HCT780X
化学成分 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
机械性能 屈服强度440-550
抗拉强度780
断后延伸率14%
EN 10346-HCT980X
化学成分 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
机械性能 屈服强度590-740
抗拉强度980
断后延伸率10%
EN 10346-HCT980XG a
化学成分 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
机械性能 屈服强度700-850
抗拉强度980
断后延伸率8%
EN 10346-HCT690T
化学成分 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
机械性能 屈服强度400-520
抗拉强度360
断后延伸率23%
中国的本钢和宝钢等钢厂可以生产些种钢号: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
请下载参考如下的文件及相关企业标准：
Q-BQB 420-2009 连续热镀锌+锌铁合金镀层钢板及钢带.pdf
Q-BQB 418-2009 双相高强度冷连轧钢板及钢带.pdf
技术支持：常州仁成金属制品有限公司，可以生产HCT780X材料的钢管：
