Product Description:
Seamless steel pipe with hollow section, used as a large number of pipe conveying fluid, such as oil, natural gas, coal gas, water and some solid materials such as pipelines. Compared with steel and round steel solid steel, the torsional strength of bending is same, the weight is light, is a kind of economic section steel, widely used in the manufacture of structural parts and mechanical parts, such as the oil pipe, automobile transmission shaft, the bicycle frame and steel construction with scaffold with steel pipe manufacturing annular parts, can improve the the material utilization rate, simplify the manufacturing process, material saving and working hours, has been widely used in steel pipe manufacturing
Standard：
GB9948 Chinese national standard
Application：
Served as for furnace tubes，heat exchange tubes and pipelines in petroleum and refinery plants
Model No．of major steel tubes：
1n 9n 1Er!rMn 1rhMn 1f：hM0 etC
Diamensional tolerances:
Types of steel tubes | Outer diameter | Wall thickness | ||
Cold-rolled tubes | Tube sizes(mm) | Tolerances(mm) | Tube sizes (mm) | Tolerances(mm) |
＞30～50 | ±0.3 | ≤30 | ±10％ | |
＞50～219 | ±0.8％ | |||
Hot-rolled tubes | ＞219 | ±1.0％ | ＞20 | ±10％ |
Mechanical properties：
Standard codes | Models of steel tubes | 抗拉强度（MPa） | 屈服强度（MPa） | 伸长率（％） | 冲击功（J） | 布氏硬度（HB） | 交货状态 |
GB9948 | 10 | 330～490 | ≥205 | ≥24 | / | / | 正火 |
20 | 410～550 | ≥245 | ≥21 | ≥39 | / | 正火 | |
15CrMo | 440～640 | ≥235 | ≥21 | ≥47 | ≤170 | 正火加回火 | |
1Cr2Mo | ≥390 | ≥175 | ≥22 | ≥92 | ≤179 | 正火加回火 | |
1Cr5Mo | ≥390 | ≥195 | ≥22 | ≥92 | ≤187 | 退火 |
Chemical composition:
Standard codes | Models of steel tubes | Chemical compositions（％） | |||||||
C | Si | Mn | P | S | Cr | Mo | Ni | ||
GB9948 | 10 | 0.07～0.14 | 0.17～0.37 | 0.35～0.65 | ≤0.035 | ≤0.035 | ≤0.15 | / | ≤0.25 |
20 | 0.17～0.24 | 0.17～0.37 | 0.35～0.65 | ≤0.035 | ≤0.035 | ≤0.25 | / | ≤0.25 | |
15CrMo | 0.12～0.18 | 0.17～0.37 | 0.40～0.70 | ≤0.035 | ≤0.035 | 0.80～1.10 | 0.40～0.55 | ≤0.30 | |
1Cr2Mo | ≤0.15 | 0.50～1.00 | 0.30～0.60 | ≤0.035 | ≤0.030 | 2.15～2.85 | 0.45～0.65 | / | |
1Cr5Mo | ≤0.15 | ≤0.50 | ≤0.60 | ≤0.035 | ≤0.030 | 4.00～6.00 | 0.45～0.60 | ≤0.60 | |
FAQ of Seamless Pipe :
①How is the quality of your products?
Our products are manufactured strictly according to national and internaional standard, and we take a test on every pipe before delivered out. If you want see our quality certifications and all kinds of testing report, please just ask us for it.
Guaranteed: If products’ quality don’t accord to discription as we give or the promise before you place order, we promise 100% refund.
②How about price?
Yes, we are factory and be able to give you lowest price below market one, and we have a policy that “ for saving time and absolutely honest business attitude, we quote as lowest as possible for any customer, and discount can be given according to quantity”,if you like bargain and factory price is not low enough as you think, just don’t waste your time.Please trust the quotation we would give you, it is professional one.
③Why should you chose us?
Chose happens because of quality, then price, We can give you both.Additionally, we can also offer professional products inquiry, products knowledge train(for agents), smooth goods delivery, exellent customer solution proposals.Our service formula: good quality+good price+good service=customer’s trust
SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem.
Any question, pls feel free to contact us !
Seamless Pipe Images：
