Seamless Cold Drawn Steel Tube
Product Overview
Key Features
●Seamless Construction: Manufactured without welds, ensuring uniform strength and eliminating potential weak points.
●High Precision: Achieved through cold drawing, providing excellent dimensional accuracy and surface finish, critical for tight tolerance applications.
●Enhanced Mechanical Properties: Improved tensile strength, yield strength, and hardness compared to hot-rolled counterparts, making them suitable for high-stress environments.
●Corrosion Resistance: Available with various surface treatments such as galvanization or chrome plating, enhancing resistance to corrosion and extending service life.
●Wide Diameter Range: Offered in diameters from 10mm to 200mm, catering to diverse application needs.
●Custom Lengths: Available in standard lengths or custom sizes upon request, ensuring perfect fit for your specific requirements.
Applications
Cold-drawn seamless steel tubes are widely used across multiple industries due to their reliability and versatility:
●Automotive Industry: Suspension components, drive shafts, and exhaust systems.
●Hydraulic Systems: Hydraulic cylinders and actuators.
●Construction: Structural supports and scaffolding.
●Petroleum and Chemical Industries: Pipelines and pressure vessels.
●Aerospace: Landing gear and hydraulic control systems.
●Mechanical Engineering: Machinery parts and tooling components.
Reasons to Choose Our Honed Precision Seamless Tubes
●Unmatched Quality: Every tube is rigorously tested to ensure it meets the highest industry standards.
●Reliable Performance: Designed to withstand extreme conditions and heavy loads.
●Long-lasting Durability: Enhanced by precise manufacturing and optional surface treatments.
●Versatile Applications: Suitable for a wide range of industries and applications.
●Flexible Customization: Custom lengths and diameters available to perfectly fit your project needs.
Invest in our cold-drawn seamless steel tubes for unparalleled performance and reliability in your projects. Order now and experience the difference!
Product Standrads
●DIN2391
●EN10305-1
●EN10303-4
●GB/T8713
●GB/T3639
Materials
●C20
●16Mn(St52/Q345)
●CK45
●25Mn
●E355
Delivery
|
Cold working/hard state |
Cold working/soft state |
Stress relief annealing state |
Annealing state |
Normalized state |
|
+C;BK |
+LC |
+SR;BK+S |
+A |
+N |
Variety
|
Processin type |
Cylinder diameter |
Lengthen |
Linearity |
Dimension precision |
Inner hole roughness |
|
Cold drawn |
30-250mm |
≤10M |
0.3-0.5/1000 |
±0.1mm |
0.8-1.6 |
|
SRB/Honing |
40-400mm |
≤10M |
0.5-0.5/1000 |
H7-H9 |
0.2-0.4 |
Dimension Tolerance
|
Inner diameter dimension |
H7 |
H8 |
H9 |
H10 |
H11 |
|
30 |
+0.021 |
+0.038 |
+0.052 |
+0.084 |
+0.130 |
|
|
0 |
0 |
0 |
0 |
0 |
|
>30-50 |
+0.025 |
+0.039 |
+0.062 |
+0.100 |
+0.160 |
|
|
0 |
0 |
0 |
0 |
0 |
|
>50-80 |
+0.030 |
+0.046 |
+0.074 |
+0.120 |
+0.190 |
|
|
0 |
0 |
0 |
0 |
0 |
|
>80-120 |
+0.035 |
+0.054 |
+0.087 |
+0.140 |
+0.220 |
|
|
0 |
0 |
0 |
0 |
0 |
|
>120-180 |
+0.040 |
+0.063 |
+0.100 |
+0.160 |
+0.250 |
|
|
0 |
0 |
0 |
0 |
0 |
|
>180-250 |
+0.046 |
+0.072 |
+0.115 |
+0.185 |
+0.290 |
|
|
0 |
0 |
0 |
0 |
0 |
Mechanics Performance
|
Steel |
Item |
|
|
Cold-Drawn Pipe |
Cold-Drawn And Relief Stress Situation |
Golden Cutting Pipe |
|
C20 |
Tensile Strength |
σ b |
N/mm² |
≥510 |
≥500 |
≥390 |
|
|
Yield Strength |
σ s |
N/mm² |
≥245 |
≥225 |
≥180 |
|
|
Elongation |
δ 5 |
% |
≥5 |
≥10 |
≥20 |
|
45# |
Tensile Strength |
σ b |
N/mm² |
≥647 |
≥630 |
≥590 |
|
|
Yield Strength |
σ s |
N/mm² |
≥355 |
≥315 |
≥270 |
|
|
Elongation |
δ 5 |
% |
≥4 |
≥7 |
≥12 |
|
16Mn |
Tensile Strength |
σ b |
N/mm² |
≥640 |
|
|
|
|
Yield Strength |
σ s |
N/mm² |
≥345 |
|
|
|
|
Elongation |
δ 5 |
% |
≥10 |
|
|
|
27SiMn |
Tensile Strength |
σ b |
N/mm² |
≥840 |
|
|
|
|
Yield Strength |
σ s |
N/mm² |
≥835 |
|
|
|
|
Elongation |
δ 5 |
% |
≥7.5 |
|
|
|
25Mn |
Tensile Strength |
σ b |
N/mm² |
≥550 |
|
|
|
|
Yield Strength |
σ s |
N/mm² |
≥275 |
|
|
|
|
Elongation |
δ 5 |
% |
≥7.5 |
|
|
Certificates and Introduction
Guangju Hydraulic Cylinder is a major Asian manufacturer of seamless steel pipes. The factory covers an area of 50,000 square meters, including 35,000 square meters of standardized workshops. With an annual production capacity of 25,000 tons and approximately 100 employees, it is a modern professional manufacturer integrating design & R&D, production, and domestic & international sales.
Our commercial activities, which started in 1978 as an enterprise newly established right after the reform and opening up with hydraulic cylinder production in China, continued with the export of seamless cold-drawn steel tube, chrome plated bar and piston rod trade during these more than 30 years.
