mild carbon cold rolled steel coil and strip pipe welding stand

Thickness, mm

<630

630~<1000

1000~<1250

1250~<1600

≥1600

<0.25

±0.03

±0.03

±0.03

-

-

0.25~<0.40

±0.04

±0.04

±0.04

-

-

0.40~<0.60

±0.05

±0.05

±0.05

±0.06

-

0.60~<0.80

±0.06

±0.06

±0.06

±0.06

±0.07

0.80~<1.00

±0.06

±0.06

±0.07

±0.08

±0.09

1.00~<1.25

±0.07

±0.07

±0.08

±0.09

±0.11

1.25~<1.60

±0.08

±0.09

±0.10

±0.11

±0.13

1.60~<2.00

±0.10

±0.11

±0.12

±0.13

±0.15

2.00~<2.50

±0.12

±0.13

±0.14

±0.15

±0.17

2.50~<3.15

±0.14

±0.15

±0.16

±0.17

±0.20

≥3.15

±0.16

±0.17

±0.19

±0.20

-

width, mm

<1250

≥1250

+3

0

+4

0

HRB

50

65

74

85

Thickness, mm

>2.40

>1.95

>1.68

>1.35

Purpose

Grades

Yield strength/R_e/MPa⁽¹⁾

Tensile strength/ R_m/MPa

Elongation/A₈₀/%⁽²⁾

r₉₀

n₉₀

Commercial

DC01

≤280

270-410

≥28

-

-

Drawing

DC03

≤240

270-370

≥34

≥1.3

-

1. If the yield point is not pronounced, the value applies to R_p0.2; if the yield point is pronounced, the value applies to R_el.
2. When the thickness is less than or equal to 0.7 mm and greater than 0.5 mm, the minimum value for elongation is reduced by 2 units. For a thickness less than or equal to 0.5 mm, the minimum value is reduced by 4 units.

Purpose

Grades

Yield strength/R_e/MPa⁽¹⁾

Tensile strength/ R_m/MPa

Elongation/A₈₀/%⁽²⁾

180^o Bend test

h

<

0.4

≥0.4~<0.65

≥0.6~<1.0

≥1.0~<1.6

≥1.6~<2.0

b≥20mm

Commercial

SPCC

-

≥270

≥32

≥34

≥36

≥37

≥38

d=0a

Deep drawing

SPCD

≤240

≥270

≥36

≥36

≥38

≥39

≥4O

d=0a

1. If the yield point is not pronounced, the value applies to R_p0.2; if the yield point is pronounced, the value applies to R_el.