CJM Steel supplies GB/T8162 seamless steel pipes with stable quality and flexible production support for global buyers. Available grades include 10#, 20#, 45#, and 16Mn (Q345/Q355), with customized dimensions, cutting, machining, and export documentation services available for mechanical, engineering, and industrial projects.
6mm – 630mm, including large diameter seamless pipes
Wall Thickness
1mm – 50mm, including thick wall steel pipes
Length
5.8m, 6m, 12m or customized
Manufacturing Process
Hot Rolled, Cold Drawn
Surface
Black, Bright, Polished
Processing Services
Cutting, CNC Machining, Heat Treatment, Polishing
Inspection & Documents
Mill Test Certificate (EN 10204 3.1 available)
Customization
Dimensions, length and processing according to drawings and project requirements
Large diameter and thick wall GB/T8162 seamless steel pipes are available for demanding mechanical and structural applications, with customized processing and export supply support.
GB/T8162 Seamless Steel Pipe Grades
CJM Steel supplies several commonly requested GB/T8162 steel pipe grades for different mechanical and structural applications.
20# Seamless Steel Pipe
20# seamless steel pipe is the most commonly used carbon steel grade under GB/T8162. It offers good machinability, weldability and balanced mechanical properties, making it suitable for general mechanical structures and engineering components.
Typical applications include:
Machine parts
Hydraulic components
Shafts and sleeves
General structural components
For customers looking for reliable and cost-effective carbon seamless steel pipe, 20# is one of the most widely selected materials.
45# Seamless Steel Pipe
45# seamless steel pipe is a medium carbon steel grade with higher strength and hardness compared with 20# steel pipe.
It is commonly used where improved mechanical performance is required, including:
Drive shafts
Gears
Pins
Mechanical transmission parts
CJM Steel can supply 45# steel pipes with customized cutting and machining services for mechanical manufacturing applications.
16Mn / Q345 / Q355 Seamless Steel Pipe
16Mn seamless steel pipe is a low alloy structural steel pipe widely used for applications requiring higher strength and load-bearing capacity.
In modern steel standards, 16Mn is commonly associated with Q345 and Q355 grade systems, depending on the specific standard and application requirements.
Advantages include:
Higher strength than ordinary carbon steel
Good toughness
Suitable for heavy-duty structures
Common applications:
Heavy machinery
Engineering equipment
Industrial structures
Large mechanical components
10# Seamless Steel Pipe
10# seamless steel pipe is a low carbon steel pipe with good weldability and machinability.
The following table shows typical chemical composition ranges of commonly supplied GB/T8162 grades.
Grade
C (%)
Si (%)
Mn (%)
P/S (%)
10#
0.07-0.14
0.17-0.37
0.35-0.65
≤0.035
20#
0.17-0.24
0.17-0.37
0.35-0.65
≤0.035
45#
0.42-0.50
0.17-0.37
0.50-0.80
≤0.035
16Mn
0.12-0.20
0.20-0.55
1.20-1.60
≤0.035
Mechanical Properties
Grade
Tensile Strength (MPa)
Yield Strength (MPa)
Elongation (%)
10#
≥335
≥205
≥24
20#
≥390
≥245
≥20
45#
≥590
≥335
≥14
16Mn
≥490
≥325
≥21
Mechanical properties may vary according to pipe manufacturing process, heat treatment condition and product requirements.
Applications of GB/T8162 Steel Pipe
GB/T8162 seamless steel pipe is mainly used in mechanical and engineering industries where strength, reliability and dimensional accuracy are required.
Machinery Manufacturing
Used for:
Machine frames
Transmission components
Mechanical parts
Engineering Equipment
Suitable for:
Construction machinery
Industrial equipment
Heavy-duty components
Automotive and Transportation Components
Commonly used for:
Shafts
Bushings
Structural parts
General Structural Applications
Used in:
Steel structures
Fabrication projects
Industrial assemblies
Customized Processing Services for GB/T8162 Steel Pipe
Besides standard pipe supply, CJM Steel provides additional processing services to improve production efficiency for customers.
Available services include:
Pipe cutting
CNC machining
Centerless grinding
Heat treatment
Surface polishing
Customized length supply
These services help customers reduce additional processing steps and shorten project lead time.
GB/T8162 Seamless Steel Pipe FAQ
What is GB/T8162 seamless steel pipe?
GB/T8162 seamless steel pipe is a Chinese standard seamless pipe used mainly for mechanical structures and general engineering applications.
What grades are commonly available for GB/T8162 steel pipe?
Common grades include 10#, 20#, 45# and 16Mn. Among them, 20# and 16Mn are two of the most widely used grades.
Is 16Mn seamless steel pipe equivalent to Q345 or Q355?
16Mn is commonly compared with Q345/Q355 grades in many applications, but the exact equivalence depends on the applicable standard and material requirements.
What is the difference between GB/T8162 and GB/T8163 seamless steel pipe?
GB/T8162 is mainly used for mechanical and structural applications, while GB/T8163 is designed for fluid transportation applications.
Can you supply customized GB/T8162 seamless steel pipes?
Yes. CJM Steel provides customized sizes, cutting, machining and surface processing according to customer requirements.
Request a Quote for GB/T8162 Seamless Steel Pipe
Looking for a reliable GB/T8162 seamless steel pipe supplier in China?
Contact CJM Steel for competitive pricing, customized processing options and export-quality seamless steel pipe solutions.
Steel product display
Galvanized tube Stock 2
FAQ
Q: What is your company’s main products/services?
A: We are a professional manufacturer for Carbon Steel, Alloy Steel and Profile products. We have the experience of steel business for more than 10 years and our products are exported to Mid East,South America,Southeast Asia,Africa,South and East Asia etc.
Q: Can I go to your factory for a visit?
A: Of course, we welcome customers from all over the world to visit our factory.
Q: What are your terms of payment?
A: 30% T/T deposite and 70% balance before shipment.
Q: What is your delivery time?
A: For stocks,we could transport the goods to loading port within 7 days after we received the deposit; For production,it usually takes about 15-30 days after receiving the deposit.
Q: Do you provide samples? Are they free or paid?
A: Samples are available for free,but the courier freight will be covered by customer account.
Q: Do you accept the third party inspection?
A:Yes, we fully accept third-party inspections.
Q: Why should I buy from you not from other suppliers?
A: Integrating the superior resources of China’s steel industry, we provide customers with high-quality steel products at preferential prices, and can ensure that the goods are delivered to customers in a timely manner.
Q:How can you guarantee quality?
A: Always a pre-production sample before mass production;Always 100% inspected before shipment
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CJM Steel Group Ltd.
