After-sales Service: | Support Online |
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Warranty: | 1year |
Type: | Seamless |
Technique: | Cold Rolled |
Material: | Carbon Steel |
Surface Treatment: | Polished |
Samples: |
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Customization: |
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Specially shaped seamless steel pipes are widely used in various structural components, tools, and mechanical components. Compared with circular pipes, special-shaped pipes generally have larger moments of inertia and cross-sectional modulus, and have greater bending and torsion resistance, which can greatly reduce structural weight and save steel.
Special shaped pipes are generally distinguished based on their cross-sectional area, and can be divided into seamless steel pipe special shaped pipes, aluminum alloy special shaped pipes, and plastic special shaped pipes according to their materials. Below, we will mainly introduce the special shaped steel pipe.
Steel pipe shaped pipes can be divided into elliptical shaped steel pipes, triangular shaped steel pipes, hexagonal shaped steel pipes, diamond shaped steel pipes, octagonal shaped steel pipes, semi-circular shaped steel pipes, unequal hexagonal shaped steel pipes, five petal plum blossom shaped steel pipes, double convex shaped steel pipes, double concave shaped steel pipes, melon shaped steel pipes, conical shaped steel pipes, and corrugated shaped steel pipes.
Product details | |
Material: | 4140 1.7225 SCM440 42CrMo4 42CrMo4 |
Section Shape | triangular/hexagonal/oval/Other Aliens |
Place of Origin | Shandong |
brand: | meide |
Technique | Cold rolling |
Size | OD: 8-100mm Thickness: 0.5 - 20 mm Length:1-9m or cutting as you require |
Tolerance | +/-0.1mm |
Payment | 30% by T/T and the 70% balance should be paid against L/C, |
OEM/ODM | Yes |
Trade terms | EXW,FOB,CIF,CNF |
Delivery Time | 8-15 days after the order |
1. The influence of quenching temperature. The normal quenching heating temperature of GCr15 steel is 830-860 ºC, and oil cooling is commonly used. The optimal quenching heating temperature is 840 ºC, and the hardness after quenching reaches 63-65HRC. Under actual production conditions, the quenching temperature used may vary slightly depending on the effective cross-sectional size of the mold and the quenching medium. If the size of the mold is large or quenched by nitrate grading, it is advisable to choose a higher quenching temperature (840-860 ºC) to improve the hardenability, obtain sufficient depth of the hardening layer and higher hardness; Smaller sized or oil cooled molds generally use lower quenching temperatures (830-850 ºC). For molds of the same specification, the heating temperature in a box furnace should be slightly higher than that in a salt bath furnace.
2. The influence of tempering temperature. As the tempering temperature increases, the hardness after tempering decreases. After the tempering temperature exceeds 200 ºC, it will enter the first type of tempering brittle zone. Therefore, the tempering temperature of GCr15 steel is generally 160-180 ºC.
1. For the storage of special-shaped steel pipe products, the site or warehouse should be selected in a clean and tidy place with smooth drainage, and away from factories and mines with harmful gases or dust. The ground should be cleaned of weeds and all debris to maintain the cleanliness of the steel.
2. In the warehouse, it is not allowed to stack materials that have a corrosive effect on steel, such as acid, alkali, salt, and sensitive soil. Different types of steel should be classified and stacked to avoid confusion and contact with corrosive objects.
3. Large steel pipes, rails, steel plates, large-diameter steel pipes, forgings, etc. can be stacked outdoors.
4. Small and medium-sized shaped steel, wire rods, steel bars, medium diameter steel pipes, steel wires, and wire ropes can be stored and placed in a well ventilated material shed, and it is important to remember to cover the top and cushion the bottom.
5. Small scale steel, thin steel plates, steel strips, small diameter or irregular steel pipes, various cold-rolled and cold-drawn steels, as well as expensive and easily corrosive metal products, can be stored and placed in storage.
6. The warehouse should be selected based on geographical conditions, and ordinary closed warehouses should be used when deemed appropriate, that is, warehouses with roofs, walls, tight windows, and ventilation devices.
7. The warehouse requires frequent maintenance of a suitable storage background, with attention to ventilation on sunny days and closed to prevent moisture on rainy days.
Packaging |
1. by bundles, each bundle weight under 3 tons, for small outer diameter steel bars, each bundle with 4 - 8 steel strips. 2. after making by bundle, covered with Polyethylene waterproof cloth. 3. make black paints painting on each bar, then make bundles |
20 feet container contains dimension | Length under 6000mm |
40 feet container contains dimension | Length under 12000mm |
By bulk vessel | Freight charge is low by bulk cargo, and large heavy sizes can not be loaded into containers can shipping by bulk cargo |
1. Who are we?
Our headquarter is located in Shandong, China. Since 2022, we have sold to North America (60.00%), Western Europe (14.00%) and South America (6.00%). There are about 11-50 people in our office.
2. How do we guarantee quality?
Always provide pre-production samples before mass production;
Always carry out final inspection before shipment;
3. What can you buy from us?
Copper, aluminum, die steel, titanium, customized machine parts
4. Why should you buy from us instead of other suppliers?
The company has 25 years of production experience. It has advanced precision production equipment, modern large warehouse, 200000 tons of inventory goods and a number of long-term stable cooperative customers.
5. What services can we provide?
Accepted delivery conditions: FOB, CFR, CIF, EXW
Accepted payment currency: US dollar, Euro, Japanese yen, Canadian dollar, Australian dollar, Hong Kong dollar, British pound, RMB, Swiss franc;
Accepted payment type: T/T, L/C, D/P D/A, PayPal;
Optional ports: Tianjin, Shanghai, Guangzhou;
Spoken: English, Chinese
6. How can we get your price?
A. We need the following information to quote for you:
1). Product Name
2). standard
3). Material grade (chemical composition)
4). dimension
5). amount
6). Special part drawin
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