| After-sales Service: | Support Online |
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| Warranty: | 1year |
| Type: | Seamless |
| Technique: | Cold Drawn |
| Material: | Alloy Steel |
| Surface Treatment: | Black/Oiled/Galvanization |
| Samples: |
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| Customization: |
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Audited Supplier 
Type steel pipes are divided into: outer hexagonal and inner circular steel pipes, outer and inner hexagonal steel pipes, inner and outer hexagonal steel pipes, flat elliptical steel pipes, elliptical steel pipes, triangular pipes, L-shaped steel pipes, octagonal pipes, mushroom shaped pipes, bread shaped pipes, D-shaped pipes, concave pipes, convex pipes, umbrella shaped pipes, P-shaped pipes, Yuanbao shaped pipes and other special steel pipes according to their shapes. The shape of special steel pipes is produced according to the needs of users.
Pipeline transportation, boiler pipes, hydraulic/automotive pipes, oil/natural gas drilling, food/beverage/dairy products, mechanical industry, chemical industry, mining, construction and decoration, special applications
| composition | C | Si | Mn | P | S | Cr | Ni | Cu | Mo |
| 15# | 0.12-0.18 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.03 | ≤0.2 | ≤0.3 | ≤0.25 | - |
| 20# | 0.17-0.23 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.3 | ≤0.25 | - |
| 25# | 0.22-0.29 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.3 | ≤0.25 | - |
| 30# | 0.27-0.34 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.3 | ≤0.25 | - |
| 35# | ≤0.17 | ≤0.35 | ≤1.4 | ≤0.04 | ≤0.04 | ≤0.3 | ≤0.3 | ≤0.3 | - |
| 40# | 0.37-0.44 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.3 | ≤0.25 | - |
| 45# | 0.42-0.5 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.3 | ≤0.25 | - |
| 55# | 0.52-0.6 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.3 | ≤0.25 | - |
| 16Mn | 0.13-0.2 | 0.2-0.6 | 1.2-1.6 | ≤0.025 | ≤0.01 | ≤0.3 | ≤0.3 | ≤0.2 | |
| 20Cr | 0.18-0.24 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | 0.7-1 | ≤0.3 | ≤0.3 | ≤0.15 |
| 40Cr | 0.37-0.44 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | 0.8-1.1 | ≤0.3 | ≤0.3 | ≤0.15 |
| 15CrMo | 0.12-0.18 | 0.17-0.37 | 0.4-0.7 | ≤0.035 | ≤0.035 | 0.8-1.1 | ≤0.3 | ≤0.3 | 0.4-0.55 |
| 20CrMo | 0.17-0.24 | 0.17-0.37 | 0.4-0.7 | ≤0.035 | ≤0.035 | 0.8-1.1 | ≤0.3 | ≤0.3 | 0.15-0 .25 |
| 30CrMo | 0.26-0.34 | 0.17-0.37 | 0.4-0.7 | ≤0.035 | ≤0.035 | 0.8-1.1 | ≤0.3 | ≤0.3 | 0.15-0.25 |
| 35CrMo | 0.32-0.4 | 0.17-0.37 | 0.4-0.7 | ≤0.035 | ≤0.035 | 0.8-1.1 | ≤0.3 | ≤0.3 | 0.15-0.25 |
| 42CrMo/4140 | 0.38-0.45 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | 0.9-1.2 | ≤0.3 | ≤0.3 | 0.15-0.25 |
| 5120 | 0.17-0.22 | 0.15-0.35 | 0.7-0.9 | ≤0.035 | ≤0.035 | 0.7-0.9 | ≤0.25 | ≤0.35 | ≤0.06 |
| Production Range | Outer Diameter:6-530mm (0.24 inch - 21.18 inch) |
| Wall Thickness:0.8-200mm (0.03 inch - 7.89 inch) | |
| Material / Grade | Carbon Steel: GB/T 3094: 10#, 20#, 35#, 45#, 55#, Q235B, Q235C, CF53, A105 ASTM A519: 1010, 1020, 1026, 1035, 1045, 1050 DIN17121/EN 10297-1, DIN1629/DIN2391/EN 10305-1: C10/CK10, C22/CK22, C35/CK35, C45/CK45, CF53 JIS3441/JIS3444/JIS3445: STKM11A, STKM12A/STKM12B/STKM12C, STKM13A/STKM13B/STKM13C JIS G4051: S10C, S20C, S25C, S35C, S45C, S55C |
| Alloy Steel: GB/T 3094: 16Mn(Q345B), 20Cr, 40Cr, 15CrMo, 20CrMo, 28CrMo, 30CrMo, 35CrMo, 42CrMo, 20CrMnTi, 40MnMoV, 20Mn2, ZF6, 16MnCr5, 20MnCr5, 38Mn2V, 09CrCuSb(ND) ASTM A519: 5120, 5140, 4130, 4135, 4140 DIN17121/EN 10297-1, DIN1629/DIN2391/EN 10305-1: ST52, EN10084-1998 20Cr4, 41Cr4, 15CrMo4, 25CrMo4, 35CrMo4, 42CrMo4, 16MnCr5 JIS3441/JIS3444/JIS3445: SCM432/SCRRM3, SCM4 JIS G4053: JIS SCr420, JIS SCr440, SCM415, SCM420 |
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| Tolerance | Can be customized according to customer's requirements |
| Technique | Cold Drawn / Cold Rolled |
| Shape | Triangle, Hexagon, Square, Rectangle, Octagon, Lemon Pipe and Others can be customized |
| Further Processing for Steel Tubes | Cutting, Chamfer, Threading, Inner diameter or Outer Diameter Lathe, Surface Shot Blasting, Laser Marking |
|
15Cr/1.7015/15Cr3/
5115/G51150/ SCr415 |
It is used to manufacture various carburized parts with high surface wear resistance, high core strength and toughness, high
working speed, but section size below 30mm, such as crank pin, piston pin, piston ring, coupling, small camshaft, pinion, slide valve, piston, bushing, bearing ring, screw, rivet, etc. It can also be used as quenched steel, manufacturing small parts with certain strength and toughness, but wide deformation requirements |
|
20Cr/A20202/20X/SCr420/5120 l/20Cr4 |
It is used to manufacture various carburized or carbonitriding parts with small section (less than 30mm), simple shape, high
speed, small load, surface wear resistance and high core strength, such as pinion, pinion, valve, piston pin, bushing ratchet, tray, cam, worm, tooth clutch, etc. For parts with small heat treatment deformation and high wear resistance requirements, general quenching or high-frequency quenching shall be carried out after carburizing, such as small module (less than 3mm) gear Spline shaft, shaft, etc. can also be used as quenched and tempered steel for manufacturing parts with low speed and medium load (impact) |
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30Cr/A20302/30X/SCr430 /5130/28Cr4/1.7033 |
It is used to manufacture various wear-resistant or impacted parts, such as gears, rollers, shafts, levers, rocker rods,
connecting rods, bolts, nuts, etc. It can also be used as high-frequency surface hardening steel to manufacture wear-resistant and high-hardness parts |
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35Cr/A20352/35X/SCr435/5135/37Cr4/1.7034
|
It is used for manufacturing gears, shafts, rollers, bolts and other important quenched and tempered parts, and its use is
basically the same as that of 30Cr |
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1.7035 40Cr 41Cr4 5140 42C4 SCR440(H) |
One of the most widely used steel grades of Zui is used to manufacture medium-speed and medium-load parts after quenching and
tempering, such as machine tool gears, shafts, worms, spline shafts, thimble sleeves, etc. After quenching and tempering and high-frequency surface quenching, it is used to manufacture parts with high surface hardness and wear resistance, such as gears, shafts, spindles, crankshafts, mandrels, sleeves, pins, connecting rods, screws, nuts, inlet valves, etc. After quenching and medium-temperature tempering, it is used to manufacture parts with heavy load and medium-speed impact, Such as oil pump rotor, sliding block, gear, main shaft, collar, etc., after quenching and low temperature tempering, it is used to manufacture heavy load, low impact, wear-resistant parts, such as worm, main shaft, shaft, collar, etc., after carbonitriding treatment Make transmission parts with large size and high low-temperature impact toughness, such as shafts and gears. The 40Cr substitute steels include 40MnB, 45MnB, 35SiNn, 42SiMn, 40MnVB, 42MnV, 40MnMoB, 40MnWB, etc |
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SCr4455145/45Cr/A20452/45X |
Similar to the use of 40Cr, it is mainly used for manufacturing high-frequency surface hardened shafts, gears, sleeves, pins, etc
|
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50Cr/A20502/5150/5150/G51500 |
It is used to manufacture heavy and wear-resistant parts, such as hot-rolled rolls, transmission shafts, gears, thrust rings
below 600mm, mandrels of backup rolls, connecting rods and tappets of diesel engines, tractor clutches and bolts, wear-resistant and high-strength oil film bearing sleeves and gears in heavy mining machinery, as well as high-frequency surface-hardened parts, moderately elastic springs, etc |
Seamless Steel Tube/Pipe
--Precise custom outer diameter and inner diameter
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
Suppliers with verified business licenses
Audited Supplier 
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