Hebei Huayang Steel Pipe Co., Ltd is one of the leading manufacturers and suppliers of gb/t 8162-2018 45# seamless steel pipe for heavy-duty mechanical components in China. Please feel free to buy cheap gb/t 8162-2018 45# seamless steel pipe for heavy-duty mechanical components from our factory. All customized products are with high quality and low price.
Product Overview
GB/T 8162-2018 Grade 45# seamless steel pipe is designed for mechanical components and engineering structures requiring high strength, good machinability and reliable dimensional performance. Its medium-carbon steel composition makes it suitable for machined parts, equipment components and structural applications where strength and wear resistance are important.
| Parameter | Specification |
|---|---|
| Standard | GB/T 8162-2018 |
| Steel Grade | 45# |
| Material Type | Medium-Carbon Structural Steel |
| Manufacturing Process | Seamless |
| Production Method | Hot-Finished or Cold-Drawn |
| Tensile Strength | ≥590 MPa |
| Minimum Yield Strength | 335 MPa for wall thickness ≤16 mm |
| Minimum Yield Strength | 325 MPa for wall thickness >16–30 mm |
| Minimum Yield Strength | 315 MPa for wall thickness >30 mm |
| Minimum Elongation | 14% |
| Main Application | Heavy-Duty Mechanical Components |
GB/T 8162-2018 specifies seamless steel pipes for mechanical and general engineering structures. Grade 45# contains approximately 0.42–0.50% carbon, providing a higher strength level than low-carbon structural steel grades. Its mechanical property requirements vary according to nominal wall thickness.
45# Material Performance
45# carbon steel offers a combination of strength, hardness potential and machinability, making it suitable for manufacturing shafts, machine components, equipment parts and other mechanical structures. Its minimum tensile strength is 590 MPa, while the specified minimum yield strength ranges from 315 to 335 MPa depending on wall thickness. The material can undergo heat treatment, such as normalizing, quenching and tempering, to achieve mechanical properties suited to different component requirements. For seamless pipe orders, quality verification may include chemical composition analysis, tensile testing, hardness testing, dimensional inspection and other examinations specified in the purchase order.
Steel Pipe Manufacturing Strength
A Manufacturer with Proven Production Capabilities
Hebei Huayang Steel Pipe Co., Ltd. is a professional steel pipe manufacturer with multiple modern production lines covering HFW/ERW steel pipes, LSAW steel pipes, hot-expanded steel pipes, anti-corrosion steel pipes, and deep processing. With an annual production capacity of 2.75 million tons, we provide reliable manufacturing capabilities for diverse industrial and infrastructure projects.
Our manufacturing facilities include:
17 HFW/ERW Steel Pipe Production Lines: OD 48–660.4 mm
4 LSAW Steel Pipe Production Lines: OD 406.4–2,800 mm
24 Hot-Expanded Steel Pipe Production Lines: OD 230–1,020 mm
2 Anti-Corrosion Steel Pipe Production Lines: OD 159–1,626 mm
1 Steel Pipe Deep Processing Line
In 2025, Huayang ranked 61st among Hebei Province's Top 100 Private Enterprises and 50th among its Top 100 Manufacturing Enterprises. Our Huayang brand HFW/ERW steel pipe has also been recognized as a Hebei Famous Brand Product.
From production facilities and manufacturing equipment to standardized production procedures, our factory capabilities support consistent production and customized steel pipe solutions for global customers.
From Raw Material to Finished Steel Pipe
Explore how Huayang manufactures LSAW and HFW steel pipes through established production processes, from raw material preparation and forming to welding, inspection, and final delivery.
Quality Assurance & Testing
Quality is controlled throughout the steel pipe manufacturing process at Huayang, from incoming raw material inspection to final product verification. Raw materials are sourced from established steel suppliers and undergo chemical composition analysis, mechanical property testing, and surface inspection upon arrival. During production, process controls and dimensional checks help ensure compliance with applicable standards and customer specifications. Finished pipes are subject to relevant inspections and tests, which may include hydrostatic testing, ultrasonic testing (UT), radiographic testing (RT), eddy current testing, dimensional inspection, and visual examination, depending on the product type and applicable requirements. Our testing facilities support quality verification at key production stages, while inspection records and quality documentation help provide traceability and confidence in product conformity.
Key Quality Control & Testing Capabilities
- Raw Material Inspection: Chemical composition, mechanical properties, and surface condition
- Non-Destructive Testing (NDT): Ultrasonic testing (UT), radiographic testing (RT), and eddy current testing, as applicable
- Mechanical Testing: Tensile, impact, hardness, and other tests as required by the applicable standard
- Hydrostatic Testing: Pressure testing in accordance with relevant product specifications
- Dimensional & Visual Inspection: Outside diameter, wall thickness, length, straightness, weld condition, and pipe-end inspection
- Quality Documentation: Material test certificates, inspection records, and third-party inspection reports, subject to order requirements
Our Certificate
Bundling and loading onto vehicles
Pipe Detaild Packages
| Specification | Pcs per Bundle | Bundling Layer Pattern | CBM per Bundle | |
| OD (mm) | Wall Thickness (mm) | |||
| 48.3 | 3.68 | 91 | 6,7,8,9,10,11,10,9,8,7,6 | 1.69 |
| 5.08 | 61 | 5,6,7,8,9,8,7,6,5 | 1.13 | |
| 60.3 | 3.91 | 61 | 5,6,7,8,9,8,7,6,5 | 1.77 |
| 5.54 | 37 | 4,5,6,7,6,5,4 | 1.07 | |
| 73 | 5.16 | 37 | 4,5,6,7,6,5,4 | 1.57 |
| 7.01 | 24 | 4,5,6,5,4 | 0.96 | |
| 88.9 | 5.49 | 24 | 4,5,6,5,4 | 1.42 |
| 7.62 | 19 | 3,4,5,4,3 | 1.19 | |
| 114.3 | 6.02 | 19 | 3,4,5,4,3 | 1.96 |
| 8.56 | 10 | 3,4,3 | 0.94 | |
| 141.3 | 6.55 | 10 | 3,4,3 | 1.44 |
| 9.53 | 7 | 2,3,2 | 1.08 | |
| 168.3 | 7.11 | 10 | 3,4,3 | 2.04 |
| 10.97 | 7 | 2,3,2 | 1.53 | |
| 219.1 | 8.18 | 7 | 2,3,2 | 2.59 |
| 12.7 | 5 | 2,3 | 1.73 | |
| 273 | 9.27 | 5 | 2,3 | 2.68 |
| 15.09 | 3 | 1,2 | 1.79 | |
| 323.8 | 10.31 | 3 | 1,2 | 2.52 |
| 17.48 | 2 | 1,1 | 1.26 | |
Pipe Protection
Pipe-end protection is advisable in case the pipe-ends are bevelled at the pipe manufacturer. In the case of overseas transport, there is an especially increased risk of damaged pipe-ends. This is caused by extra handling procedures in ports and shifting of the pipes onboard vessels.
In addition to end caps or protective rings, external wrapping with protective cloth can be applied along the pipe body. This wrapping helps to safeguard the coating surface from scratches, moisture, and contamination during long-distance transportation or prolonged outdoor storage. Especially for coated or painted pipes, the additional protective cloth layer significantly reduces the risk of mechanical damage, UV exposure, and corrosion initiation, ensuring the pipes arrive at the destination in optimal condition.
Pipe Painting Services
In addition to pipe-end protection and external wrapping, Huayang provides customized steel pipe painting services to meet different project specifications and environmental requirements. Available options include water-based eco-friendly quick-drying paint, epoxy paint, quick-drying black paint, bituminous paint, and high-temperature-resistant paint. Paint type and application can be selected according to customer requirements, providing suitable surface protection for transportation, storage, and service conditions.
Steel Pipe Deep Processing
Beyond standard steel pipe manufacturing, Huayang provides customized deep processing services to meet different project and installation requirements. Our capabilities include flange welding, loose flange assembly, steel pipe piles, extra-long pipe joining, end beveling, and other fabrication services. Processing can be carried out according to customer drawings, technical specifications, and project requirements, helping customers reduce on-site fabrication work and improve installation efficiency.
|
Processing Items |
Diameter Range |
Wall Thickness |
Length |
|
Beveling Squaring |
60~1422 |
4~20mm |
1~20m |
|
Pipe Straightening |
219~820 |
4~25mm |
6.5~20m |
|
Hydrostatic Testing |
76~1422 |
4~50mm |
8~12.5m |
|
Pipe Bundling |
60~457 |
Bundle as per the customer's requirements |
|
|
Extra-long butt welding of steel pipe |
219~6000 |
No restrictions |
≤60m |
|
Pipe Prefabrication (Flange connection) |
Steel pipe welding & prefabrication can be customised to drawings |
≤60m |
|
|
Steel Support Welding Processing |
≤60m |
||
|
Steel Pipe Pile Welding (Clutch) |
≤32m |
||
|
Pipe Truss Assembly Welding |
≤60m |
||
|
Steel Pipe Pile Stud Welding |
≤60m |
||
|
Wrap the steel pipe |
2.5~12m |
||
|
Coil Uncoiling, Width and Thickness Range |
|||
|
Material |
Uncoiling |
Width, Thickness |
Uncoiling Length |
|
Q235B |
1~2.1m |
8~19mm |
6~13m |
|
Q355B |
1~2.1m |
8~16mm |
6~13m |
Ordering Terms & Delivery
Huayang Steel Pipe offers flexible ordering and shipping arrangements based on pipe specifications, order quantities, and project requirements.
- Minimum Order Quantity (MOQ): MOQ depends on the pipe type, dimensions, steel grade, and production requirements. Trial orders and smaller quantities can be discussed with our sales team.
- Production Lead Time: Typical lead times may range from approximately 30–60 days after order confirmation, depending on order volume, material availability, and production schedules. The confirmed delivery schedule will be provided with the quotation or sales contract.
- Trade Terms: We can discuss EXW, FCA, FOB, CFR, and CIF terms according to the destination, shipping arrangements, and customer preferences.
- Payment Terms: T/T is a commonly discussed payment method. The deposit ratio, balance payment schedule, and other acceptable arrangements are subject to mutual agreement and contract terms.
- Packaging & Shipping: Steel pipes can be bundled, marked, and protected according to customer requirements. Export packaging, loading arrangements, and shipping schedules can be coordinated based on the order and destination port.
- Quotation & Order Confirmation: To receive an accurate quotation, please provide the applicable standard, steel grade, outside diameter, wall thickness, pipe length, quantity, inspection requirements, and destination port.
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