| 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 |
4140 steel, which has good workability, minimal processing deformation, and excellent fatigue resistance, belongs to the category of medium to high hardenability steel. After heat treatment, 4140 has good strength and comprehensive mechanical properties, good processability, and high yield. The maximum service temperature is 427 degrees Celsius. 4140 has high strength, hardenability, toughness, and deformation during quenching. It has high creep strength and endurance strength at high temperatures. Used for manufacturing forgings that require higher strength and larger quenched and tempered sections than 35CrMo steel, such as large gears for locomotive traction, booster transmission gears, rear axles, connecting rods and spring clips that are heavily loaded, as well as for oil deep well drill pipe joints and fishing tools below 2000m, and for molds for bending machines.
Tensile strength σ b (MPa):≥1080(110)
yield strength σ s (MPa):≥930(95)
Elongation rate δ 5 (%):≥12
Reduction of area ψ (%):≥45
Impact energy Akv (J): ≥ 63
Impact toughness value α kv (J/cm2):≥78(8)
Hardness: ≤ 217HB
Sample size: The size of the sample blank is 25mm
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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