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Related products : DC01(St12) , DC06(St16, St14-T, BSC3) , DC05(BSC2) , DC03(St13)
With deep drawing use and welding performance and relatively high dimensional accuracy, DC04(St14, St15) cold-rolled low carbon steel plates have been widely applied to manufacture of various automotive parts.
DC04(St14, St15) cold-rolled low carbon steel chemical composition:
Steel grade |
Chemical composition % |
|||||
|
C |
Mn |
p |
S |
Alta |
Ti b |
|
|
DC04(St14, St15) |
≤0.08 |
≤0.40 |
≤0.025 |
≤0.020 |
≥0.020 |
- |
a: For steel grades DC04, when C≤0.01, Alt≥0.015.
b: with Nb instead of Ti, but Nb and TI total content ≤0.20
DC04(St14, St15) cold-rolled low carbon steel mechanical performances:
Steel grade |
Yield |
Tensile |
After Breakage Percent Elongation |
r b,c |
n b, c |
|||
|
Nominal Thickness mm |
||||||||
|
<0.70 |
0.70~<1.0 |
1.0~<1.6 |
≥1.6 |
|||||
|
DC04(St14, St15) |
120~210 |
270 |
36 |
38 |
39 |
40 |
1.5 |
0.18 |
a. taking R P0.2 in case of indistinct yield, otherwise R eL .
b. r 90 and n 90 for DC04, allowable reduction by 0.2 in case of thickness≥1.6mm, no guarantee for r and n in case of thickness ≥2.0mm.
c. r=(r 90 +2r 45 +r 0 )/4; n=(n 90 +2n 45 +n 0 )/4.
DC04(St14, St15) cold-rolled low carbon steel surface quality:
Grade |
Code No. |
Features |
|
Relatively high-grade finishing surface |
FB(O3) |
It is allowed for the existence of a few surface defects which will not affect forming and coating & plating adhesiveness such as minor scratch, impression, pit, roll mark and oxidation tint. |
|
High-grade finishing surface |
FC(O4) |
One side of relatively good quality is free from any remarkable defect visible and the other side must reach FB requirements at least. |
|
Ultra high-grade finishing surface |
FD(O5) |
One side of relatively good quality is free from any defect, namely appearance quality after painting or electrogalvanizing is no affected, and the other side must reach FB requirements at least. |
DC04(St14, St15) cold-rolled low carbon steel reference list of equivalent steel grades:
Standard No. |
Q/BQB 403-2003 |
BZJ 492-2004 |
EN 10130-1999 |
EN 10130-1999 |
D2N 1623-(1)-1983 |
GB/T 5213-2001 |
Q/BQB 403-1999 BZJ407-1999 |
|
Steel grade |
DC04(St14, St15) |
DC04(St14) |
DC04 |
Fep04 |
St14 |
SC1 |
St14, St14F, St14HF, St14ZF, St15 |
As for tensile strain mark, DC04(St14, St15) cold-rolled low carbon steel is guaranteed that no tensile strain mark occurs on steel plates and strips at their application within 6 months after they are produced and in case of room temperature storage.