Product Description
The seamless steel pipe is made of perforated whole round steel, and the steel pipe without weld seam on the surface is called seamless steel pipe. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and pipe jacking. According to different uses, there are thick-walled seamless steel pipes and thin-walled seamless steel pipes. Seamless steel pipes are mainly used as petroleum geological drilling pipes, cracking pipes for petrochemical industries, boiler pipes, bearing pipes and high-precision structural steel pipes for automobiles, tractors and aviation.The production of our seamless pipes is tightly regulated and all of the pipes we stock have been fully tested to international standards to ensure we only supply the highest quality products.
DIN 17175 Grade St 45-8 standard applies to seamless tubes including tubes for headers of heat-resistant steels which are used in the construction of boilers, pipe-lines, pressure vessels and equipment for service up to 600″ and at simultaneous high pressures, where the to total stress and the relevant scaling conditions can raise or lower the temperature limit. Our pipe are been supplied in both Plain Square cut,Deburred Ends or Bevelled End. This can be provided with Mill Standard Varnished ,stencilled and bundle Strapped with end caps fitted. Each Bundle is packed according to the customer requirement for export orders.
Ferro PipE is considered as the most Reliable DIN 17175 Grade St 45.8 Pipes.
Standard:DIN 17175
Seamless Steel Tubes For Elevated Temperatures
As far as DIN 17175 is concerned, steels that have a good mechanical properties at a higher temperature, up to 6 00 °C, and even under long-term load, are called heat-strength steels.
DIN 17175 St45.8 Seamless Steel Tubes can be used to manufacture steam boilers, pipes, pressure vessels and instruments operating at temperatures up to 600 ° C and at high temperatures.
Manufacturing method
DIN 17175 St45.8 Seamless Steel Tubes may be produced by hot rolling, cold rolling, hot pressing, hot drawing or cold drawing.
The tube steel can be smelted in a flat furnace or an electric furnace according to the oxygen blowing method, and all steels should be cast in a static manner.
Heat treatment temperature of DIN 17175 St45.8 Seamless Steel Tubes
| Steel Grade |
Thermal processing ºC |
NormalizingºC |
Tempering |
| Grade |
Material number |
Quenching temperature ºC |
Tempering temperature ºC |
| St45.8 |
1.0405 |
1100 to 850°C |
870-900 |
- |
- |
Chemical composition of DIN 17175 St45.8
| Standard:DIN 17175 |
grade |
Chemical composition |
| C |
Si |
Mn |
P,S |
Cr |
Mo |
| St45.8 |
≤0.21 |
0.10-0.35 |
0.40-1.20 |
≤0.030 |
/ |
/ |
Mechanical property of DIN 17175 St45.8
| Standard |
grade |
Tensile Strength(MPa) |
Yield Strength(MPa) |
Elongation(%) |
| DIN 17175 |
St45.8 |
410-530 |
≥255 |
≥21 |
Dimensions Tolerance
| Project |
Standard |
Size range |
Tolerance |
| Outer diameter |
DIN17175 |
Hot rolled steel pipe |
OD ≤ 100mm |
± 0.75%( Min ± 0.5mm ) |
| OD> 100~ 320mm |
± 0.9% |
| Cold drawn steel pipe OD ≤ 120mm |
± 0.6%( Min ± 0.25mm ) |
| Wall thickness |
DIN17175 |
OD ≤ 130mm |
WT ≤ 2Sn |
+15%~-10% |
| WT > 2Sn~4Sn |
+12.5%~-10% |
| WT > 4Sn |
± 9% |
| 130 < OD ≤ 320mm |
WT ≤ 0.05OD |
+17.5%~-12.5% |
| 0.05OD < WT ≤ 0.11OD |
± 12.5% |
| WT > 0.11OD |
± 10% |
Detailed Photos
Production Process
1. Materials: Take the raw materials out of the raw material warehouse or procurement channels, and conduct inspection and sorting;
2.temperature control: according to the required performance of the product, choose the appropriate temperature, and control it within a certain range;
3. Heating: Use hot blast stove or other heating methods to heat raw materials to the required temperature;
4.annealing: the heated raw materials into the torch box for annealing treatment, in order to improve the mechanical properties of raw materials;
5. Hot rolling: Put the heated raw materials into the hot rolling mill, and process the raw materials through pressure to obtain the required products;
6.cooling: hot rolled products with water or other coolant for cooling, to ensure the stability of the product structure;
7.detection: physical and chemical performance test to determine whether it meets the requirements;
8. Finishing: Organize the products, label them, and prepare them for loading and delivery.
Original material test
A thin sheet should be taken at the top end of each round or square bar ingot for a pickling test to determine if the top end is adequately cut. Ultrasonic testing can also be performed on the shrinkage hole as selected by the supplier.
Test:
Chemical composition verification test
hydrostatictest
Tensile test
Notched impact test
Yield strength test
Ring test
Nondestructive testing
Packaging & Shipping
Company Profile
Baowu Group was established in 2012, is a comprehensive company integrating industry and trade. The company has successively won the honorary titles of provincial integrity enterprise and municipal excellent enterprise.
We are mainly engaged in various metal related products. Such as pipes, pipe fittings, rods, coils, profiles, medium and heavy plates, narrow strips and other types of materials. The warehouse has a variety of products of different specifications and materials, and the capacity is maintained at 30,000-50,000 tons/month. Products are widely used in petroleum, chemical, electric power, coal, machinery, high and low pressure boiler tubes, hydraulic props, ships and other industries. We make full use of the advantages of self-operated export rights and enter the international market. Our customers are located in South Korea, Canada, Iran, Pakistan, Indonesia, Vietnam, South America and other countries, and we have offices in Indonesia and Vietnam. The quality of our products is enjoyed at home and abroad. high reputation.
We adhere to the business philosophy of "integrity service, win-win cooperation, customer first", and provide one-stop steel solutions for global customers. Welcome friends from all over the world to visit our company. We are looking forward to establishing business relationships and personal friendships with you.
customers
Certifications
FAQ
Q:How do you control quality?
A:Mill test certification is supplied with shipment,third party inspection is avaliable.
Q:What are the advantages of your company?
A:We have many professionals,technical personnel,more competitive prices and best after-sales service than other stainless steel companies
Q:How many coutries you already exported?
A:Exported to more than 50 countries mainly from Arab, Kuwait, Egypt, Turkey, Jordan, Brazil, India, Indonesia, Korea, etc
Q:Can you provide sample?
A:Small sample in store and can provide the sample for free.Customized samples will take about 5-7days
Q:Why should you buy from us not from other suppliers?
A:Diversified products, direct supply from manufacturer.
Q:What is your terms of payment ?
A:we accept T/T ,L/C ,D/A,D/P, Western union, paypal ,The payment method can be negotiated by both parties according to the actual situation.
Please Please leave your enquiry in the message box at the bottom of the product page and click SEND, we will contact you as soon as possible !
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