Commodity Specifications:
1.Commodity name:st35 steel pipe NBK GBK cold drawing carbon pipes
2.Standard:GB/T8713,GB/T3639,DIN2391,EN10305,ASTMA519,ASTMA106-2006
3.Grade: 10#(St37/St37.2/St35.8),20#(aisi1020,ck20,St42-2/St45-8/St45-4),
45#(aisi1045,ck45,ASTM A1045),st52(16Mn,Q345D),25Mn(stkm13c-t),27SiMn
4.OD:30-250mm;
5.ID tolerance:H8,H9,H10
6. Wall thickness:10%×ID
7.Surface roughness:Ra 0.02— 0.4μm
8. Delivery condition:BK,BKW,BKS,GBK,NBK
9.Package: steel strip bundles, black paint coating, beveled ends or plain
10.Payment Terms: L/C or T/T(30% deposit and 70% balance against B/L copy)
11.Price Item:EXW,FOB,CFR or CIF
12.Delivery Time: Usually 15 working days after order confirmed& getting T/T deposit or original L/C
Delivery Condition | Cold drawn+ stress-relieved(BK+S)(SR) | Cold fished (hard)(BK) | |||
Steel Grade | Tensile strength (Rm Mpa) | Yield strength | Elogation A5% | Tensile strength (Rm Mpa) | Elogation A5% |
20# |
| ≥375 | ≥15 | ≥550 | ≥8 |
45# | ≥600 | ≥520 | ≥10 | ≥640 | ≥5 |
E355(Q345B,St52) | ≥600 | ≥520 | ≥14 | ≥640 | ≥5 |
25Mn | ≥600 | ≥510 | ≥15 | ≥640 | ≥5 |
27SiMn | ≥760 | ≥610 | ≥10 | ≥800 | ≥5 |
ID Tolerance:
ID size | ID deviation (mm) | |||
H7 | H8 | H9 | H10 | |
30 | +0.021 0 | +0.033 0 | +0.052 0 | +0.084 0 |
>30~50 | +0.025 0 | +0.039 0 | +0.062 0 | +0.100 0 |
>50~80 | +0.030 0 | +0.046 0 | +0.074 0 | +0.120 0 |
>80~120 | +0.035 0 | +0.054 0 | +0.087 0 | +0.140 0 |
>120~180 | +0.040 0
| +0.063 0 | +0.100 0 | +0.160 0 |
>180~250 | +0.046 0 | +0.072 0 | +0.115 0 | +0.185 0 |
>250~315 | +0.052 0 | +0.081 0 | +0.130 0 | +0.210 0 |
>315~400 | +0.0527 0 | +0.089 0 | +0.140 0 | +0.230 0 |
Delivery condition:
1. NBK(+N)
after cold forming, eventually above phase transition point, in a protective atmosphere of annealing oxidation medium
2. GBK(+A)
after cold forming, annealing in non oxidizing medium protective gas
3. BK(+C)
the final heat treatment after cold forming, therefore small steel pipe plastically, the plastically degree does not guarantee
4. 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)
5. 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
Certificate:
Product Process:
1.Pickling,2.Cold drawn/cold rolled,3.Stress relieve/Anneal,4.Sawing and Straigntening,
5.Straightness and Dimension Inspection,6.Lathe,7.Honed or SRB,8.Surface polishing,
9.Finished products,10.Package,11.Prepare for delivery.
Products photos:
About our company:
Established in Dec 1992, with registered capital of 5 million Yuan, Yantai Xinpeng Steel Pipe Co.,Ltd has more than 20 years experience in manufacturing and exporting steel pipe. Our company mainly produces various specifications of cold finished precision steel pipe, which are widely used in hydraulic Pneumatic cylinder
for automobile, engineering machinery, textile machinery, printing machinery, oil drilling and other field.
We Have passed ISO9001 verified from 2008,each tube of ours is strictly in quality control that can assure the product quality of Xinpeng.
Application:
1.Hydraulic Cylinder Tube---Used in the hydraulic cylinder of the heavy machinery, Cranes, excavator also forklifts. Material is various, mainly STKM-13CT, ST52, CK45 and 1020. We can work and get the mechanical property of the clients need and extended the life of the hydraulic cylinder.
2.SRB tube ----- Used in Elevator,buffer and Hydraulic Cylinder .This kind tube have a better roughness inner the tube, ra0.2-0.4um and can use directly in the hydraulic cylinder tube.
Range: ID 50-250mm and Length can work at most 6M.
3.Cold finished tube---- Widely Used. Processing range 30-300mm, biggest length is 11M.
1. High quality seamless steel tube with reasonable price.
2. Wide excellent experiences with after-sale service.
3. Samples can be provided as your requirements.
4. Professional packing teams which keep every packing safety.
5. Every process will be checked by responsible QC which insures every product's quality.
6. Every process can be produced as to our clients' requirements.
7. Any questions can be answered in time after you told us.
8. Quick respond to your inquiry.
Welcome to China,Welcome to Xinpeng.Please send your new inquiry to get best offer.
Anna Li
Tel:+86-535-6835398
Mob/whatsapp:+86-13723942673
Skype:chinaly2008