DIN2391scm Precision Seamless Steel Pipe/Automotive Pipe/Steel Pipe

product name

manager

standard

Specification range (mm)

steel grade

Cold drawn seamless

Precision tube

DIN2391

Φ3~80×0.5~8

ST35, ST37.4, ST44,

ST45, ST52

Name

Range (mm)

DIN series (mm)

outer diameter

3-30

±0.08

31-40

±0.15

41-50

±0.20

51-60

±0.25

wall thickness

0.5-8

±10%

standard

steel grade

Mechanical behavior

GBK(+A)

NBK(+N)

to stretch

strength

(Rmmpa)

elongation

speed

(A5%)

to stretch

strength

(Rmmpa)

yield

strength

(Rempa)

elongation

speed

(A5%)

DIN 2391

St. 35

≥315

≥25

346-478

≥235

≥25

St. 37

≥315

≥25

346-478

≥235

≥25

St. 37.4

≥315

≥25

346-478

≥235

≥25

St. 45

≥390

≥21

440-570

≥255

≥21

St. 44

≥390

≥21

440-570

≥255

≥21

St. 52

≥490

≥22

490-630

≥355

≥22

end shape

Beveled end, flat end, disappear or add plastic caps to protect both ends according to customer's requirements

Require

surface

treat

Oiling, galvanizing, phosphating, etc.

technology

Cold drawn and rolled

application

1. Automobile and mechanical pipes

2. Petroleum cracking pipe

3. High pressure boiler tube

4. Low and medium pressure fluid delivery pipelines

5. Fertilizer equipment pipeline

6. Heat exchanger tubes

deliver goods

situation

1. Lower back (+C)

No heat treatment is required after the last cold forming.

2. BKW (+LC)

After the last heat treatment, a light finishing process (cold drawing)

3. BKS (+SR)

After the final cold forming process, the tubes are stress relieved annealed.

4. GBK (+A)

After the final cold forming process, the tubes are annealed in a controlled atmosphere.

5. NBK (+N)

After the final cold forming process, the tube is annealed above the upper part

The transition point in a controlled atmosphere.

pack

1. Bundled packaging.

2. According to customer requirements, flat end or disappear.

3. Wrap with waterproof paper.

4. There are several steel strips on the burlap.

5. Packed in a heavy-duty three-wall box.