Low carbon and ultra-low carbon steel plates and strips
According to application, the cold rolled low carbon steel and ultra-low carbon steel can be divided into common quality, drawing quality, deep drawing quality, extra-deep drawing quality and supreme extra-deep drawing quality.
See following table for their applications and features:
| Application |
Features |
Steel Grades,
for example |
| Commercial purposes(CQ) |
With some ductibility, they are suitable to simple forming, bending or welding |
DC01, SPCC, BLC |
| Drawing(DQ) |
With more ductibility than the common ones, they are suitable to manufacturing parts through drawing and relatively complicated deforming |
DC03, SPCD, BLD |
| Deep drawing(DDQ) |
With more ductibility and homogeneity than the drawing ones, they are suitable to manufacturing parts through deep drawing and complicated deforming. |
DC04, SPCE, BUSD |
| Extra-deep drawing(EDDQ) |
Extra-deep drawing(EDDQ) With more ductibility and homogeneity than the deep drawing ones, they are suitable to manufacturing parts through extra-deep drawing and more complicated deforming. |
DC05, BUFD |
| Supreme extra-deep drawing(SEDDQ) |
With more excellent drawing capability than the extra deep drawing ones, they are suitable to manufacturing parts through supreme extra-deep drawing and extremely complicated deforming. |
DC06, BSUFD |
1 .Reference list of supply standards and steel grades as well as those equivalent or close to them
| Standard No. |
Q/BQB
403-2003 |
EN10130-1999 |
EN10130-1991 |
DIN1623-(1)-1983 |
GB/T5213-2001 |
Q/BQB403-1999
BZJ407-1999 |
| Steel |
DC01(St12) |
DC01 |
FeP01 |
St12 |
- |
St12 |
| DC03(St13) |
DC03 |
FeP03 |
RRSt13 |
- |
St13 |
| Steades |
DC04(St14, St15) |
DC04 |
FeP04 |
St14 |
SC1 |
St14, St15 |
| DC05(BSC2) |
DC05 |
FeP05 |
- |
SC2 |
BSC2 |
| DC06(St16) |
DC06 |
FeP06 |
- |
SC3 |
St16 |
| Standard No. |
Q/BQB 402-2003 |
JISG3141-1996 |
GB/T5213-2001 |
Q/BQB 402-1999 |
| Steel Grades |
SPCC |
SPCC |
- |
SPCC |
| SPCD |
SPCD |
- |
SPCD |
| SPCE |
SPCE |
SC1 |
SPCE |
| SPCEN |
SPCEN |
SC2 |
SPCEN |
2. Product sizes : Nominal thickness: 0.17mm ~ 0.35mm, nominal width: 120mm~1850mm
3. Chemical Composition %:
| Grade |
CHEMICAL COMPOSITION % |
| C |
Mn |
P |
S |
Alt |
| DC01(St12) |
≤ 0.10 |
≤ 0.50 |
≤ 0.035 |
≤ 0.025 |
≥ 0.020 |
| DC03 (St13) |
≤0.08 |
≤0.45 |
≤0.030 |
≤0.025 |
≥0.020 |
| DC04 (St14, St15) |
≤0.08 |
≤0.40 |
≤0.025 |
≤0.020 |
≥0.020 |
| DC05 (BSC2) |
≤0.008 |
≤0.30 |
≤0.020 |
≤0.020 |
≥0.015 |
| DC06 (St16) |
≤0.006 |
≤0.30 |
≤0.020 |
≤0.020 |
≥0.015 |
| SPCC |
≤0.12 |
≤0.50 |
≤0.035 |
≤0.025 |
≥0.020 |
| SPCD |
≤0.10 |
≤0.45 |
≤0.030 |
≤0.025 |
≥0.020 |
| SPCE,SPCEN |
≤0.08 |
≤0.40 |
≤0.025 |
≤0.020 |
≥0.020 |
4. Mechanical and process performances
| Grade |
Yieength MP |
Tensile Strength MP ≥ |
After Breakage Percent Elongation (LO=80mm,b=20mm)% ≥ |
| Nominal Thickness mm |
| <0.70 |
0.70～<1.0 |
1.0～<1.6 |
≥1.6 |
| DC01 (St12) |
130-260 |
270 |
28 |
30 |
32 |
34 |
| DC03 (St13) |
120-240 |
270 |
32 |
34 |
35 |
36 |
| DC04(St14.St15) |
120-210 |
270 |
36 |
38 |
39 |
40 |
| DC04 (St14, St15) |
110-190 |
260 |
38 |
39 |
40 |
41 |
| DC06 (St16) |
100-180 |
250 |
39 |
40 |
41 |
42 |
| Grade |
Yieldstrength MP |
Tensile Strength MP ≥ |
After Breakage Percent Elongation (LO=80mm,b=20mm)% ≥ |
| Nominal Thickness mm |
| <0.60 |
0.60～<1.0 |
1.0～<1.6 |
≥1. |
| SPCC |
— |
270 |
34 |
36 |
37 |
38 |
| SPCD |
— |
270 |
36 |
38 |
39 |
40 |
| SPCE,SPCEN |
210 |
270 |
38 |
40 |
41 |
42 |
5. 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 |
FB(O4) |
FB(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 |
FB(O5) |
One side of relatively good quality is free from any defect, namely appearance quality after painting or electrogalvanizing is not affected, and the other side must reach FB requirements at least. |
