Product Details

company detail

GB/T 3639 high precision cold rolled seamless steel tube

YanTai XinPeng Steel Pipe Co.,Ltd located in Yantai, a beautiful coastal city in Jiaodong Peninsula, our company is in the (APEC) Science & Technology Industrial Park, urban area of Yantai, with convenient transportation. Established in December 1992, with registered capital of 5 million yuan .

Our company mainly produces various specifications of cold drawn,rolled precision steel tube,hydraulic cylinder tube and SRB Tube, which are widely used in such industries as hydro-cylinder, automobile, engineering machinery, textile machinery, printing machinery, oil drilling, etc. Our company is also the distributor of several domestic well-known steel tube plants in Shandong, and mainly distributes seamless steel tubes of all kinds of materials.

ASTM A53 seamless steel tube refers to the American standard A53-f corresponds to the China q235 material, a53-a corresponds to the China 10# material, a53-b corresponds to the China 20# material.

20 of steel 20 refers to the carbon content of 0.2%, which belongs to low carbon steel.Steel can be divided into low carbon steel, medium carbon steel and high carbon steel.

Carbon content: low carbon steel is generally less than 0.25%;Medium carbon steel is generally between 0.25 and 0.60%;High carbon steel is generally greater than 0.60%.

In addition to contain carbon (C) elements in steel and for DNA containing a certain amount of silicon (Si) (generally no more than 0.40%), manganese (Mn), high (generally no more than 0.80%, to 1.20%) alloy elements, excluding other alloying elements (except for residual element).

20# SEAMLESS TUBE

ASTMA53B Seamless Steel Pipe size

ID size

ID deviation (mm)

H10

+0.021

+0.033

+0.052

+0.084

>30~50

+0.025

+0.039

+0.062

+0.100

>50~80

+0.030

+0.046

+0.074

+0.120

>80~120

+0.035

+0.054

+0.087

+0.140

>120~180

+0.040

+0.063

+0.100

+0.160

>180~250

+0.046

+0.072

+0.115

+0.185

>250~315

+0.052

+0.081

+0.130

+0.210

>315~400

+0.0527

+0.089

+0.140

+0.230

delivery condition	direction
BK(+C)	the final heat treatment after cold forming, threfore small steel pipe plasticly, the plasticly degree does not guarantee
BKS(+SR)	have a stress relief after cold forming, heat treatment, steel pipe can be carried out within a certain limit in the appropriate processing again
NBK(+N)	after cold forming, eventually above phase transition point, in a protective atmosphere of annealing oxidation medium
BKW(+LC)	after final heat treatment, a tiny cold drawing deformation, continue again when machining steel pipe allowed inside certain limits cold deformation(bending, flaring)
GBK(+A)	after cold forming, annealing in non oxidizing medium protective gas

used for hydraulic cylinder tube

USED FOR

Guaranteed

Guaranteed

If products’ quality doesn’t match the description we give or promise

before you place your order,we promise 100% refund.

(1): High quality products with reasonable price.

(2): We are factory .
(3): Professional packing teams which keep every packing safely.
(4): Trial order can be done in one week.
(5): Samples can be provided as your requirements.

(6): We have more than 22years experience in exporting .

can provide the high quality products.

(7: We have five thousand tons of stock in warehouses with abundant

capital.

(9): Wide excellent experiences with after-sale service.