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Home > Casing pipes > Seamless Non-Alloy Steel Pipes 20#45#16Mn 27Simn ASTM Standard Thick Wall Round Section Powder Coated Structure Oil Pipe
Seamless Non-Alloy Steel Pipes 20#45#16Mn 27Simn ASTM Standard Thick Wall Round Section Powder Coated Structure Oil Pipe
Seamless Non-Alloy Steel Pipes 20#45#16Mn 27Simn ASTM Standard Thick Wall Round Section Powder Coated Structure Oil Pipe
Seamless Non-Alloy Steel Pipes 20#45#16Mn 27Simn ASTM Standard Thick Wall Round Section Powder Coated Structure Oil Pipe
Seamless Non-Alloy Steel Pipes 20#45#16Mn 27Simn ASTM Standard Thick Wall Round Section Powder Coated Structure Oil Pipe
Seamless Non-Alloy Steel Pipes 20#45#16Mn 27Simn ASTM Standard Thick Wall Round Section Powder Coated Structure Oil Pipe
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Seamless Non-Alloy Steel Pipes 20#45#16Mn 27Simn ASTM Standard Thick Wall Round Section Powder Coated Structure Oil Pipe
Seamless Non-Alloy Steel Pipes 20#45#16Mn 27Simn ASTM Standard Thick Wall Round Section Powder Coated Structure Oil Pipe
Seamless Non-Alloy Steel Pipes 20#45#16Mn 27Simn ASTM Standard Thick Wall Round Section Powder Coated Structure Oil Pipe
Seamless Non-Alloy Steel Pipes 20#45#16Mn 27Simn ASTM Standard Thick Wall Round Section Powder Coated Structure Oil Pipe
Seamless Non-Alloy Steel Pipes 20#45#16Mn 27Simn ASTM Standard Thick Wall Round Section Powder Coated Structure Oil Pipe

Seamless Non-Alloy Steel Pipes 20#45#16Mn 27Simn ASTM Standard Thick Wall Round Section Powder Coated Structure Oil Pipe

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Product Description

Product Highlights
✔ High Precision: Complies with GB/JIS/GS precision standards.
✔ Customizable Processing: Full customization available, including CNC machining and special treatments.
✔ Quality Assurance: ISO 9001 certified for stable, consistent quality.
✔ Wide Applications: Ideal for construction machinery, lifting equipment, mining machinery, and hydraulic systems.
✔ Reliable Lead Time: 8-14 day lead time for on-time delivery.
Technical Specifications
Product Name Precision cold-drawn steel pipe / Precision honing tube / Precision boring rolling tube / Stainless steel honing cylinder
Working Method Cold Rolled / Hot Rolled / Cold Drawn / CD-Honed / CD-SBB / Rolled-Honed / Rolled-SBB
Shape Round Shape
Length Customizable Length
Thickness ≥4mm
Tolerance H7/H8/H9/H10
Material Grade 20#(1020), 45#(1045), 16Mn(Q345), 25Mn, 27SiMn, 304(S30400), 316L(S31603) & Other Grades Available
MOQ 1 Ton
Processing Welding/Bending/Uncoiling/Punching/Cutting/Mold Opening
Standard GB3639-2000 ISO9001
Product Application Widely used in construction machinery (crane, loader, excavator, pump truck, pile press machine, stacker), agricultural machinery, mining equipment, and general hydraulic machinery.
Hydraulic & Pneumatic Actuator Standards
Working Method Cylinder ID(mm) Length (m) Straightness (mm) Accuracy ID WT Tolerance Roughness (μm)
Cold Drawn40-320≤16m0.2-0.5-±5%0.8-1.6
Cold Rolled30-100≤16m0.2-0.5-±5%0.8-1.2
CD-Honed40-500≤12m0.2-0.3H7-H8-H9±5%0.2-0.8
CD-SBB40-400≤9m0.2-0.3H7-H8-H9±5%≤0.4
Rolled-Honed320-400≤9m0.2-0.3H7-H8-H9±8%≤0.8
Rolled-SBB320-400≤9m0.2-0.3H7-H8-H9±8%≤0.4
Mechanical Property
Steel Grade T.S bN/mm² (BK) Elongation 5% (BK) T.S bN/mm² (BK+S) Y.S sN/mm² (BK+S) Elongation 5% (BK+S) Hardness HB
20#≥550≥8≥520≥470≥12175
45#≥650≥5≥600≥520≥12207
16Mn≥640≥5≥600≥520≥15190
25Mn≥640≥5≥600≥510≥15195
27SiMn≥840≥5≥800≥720≥10230
Production Showcase
Production Showcase
Competitive Advantages
Competitive Advantages
Global Presence & Logistics
Trade Show
Packaging
Extended Facility Profile
Facility 1
Facility 2
Facility 3
Facility 4
Frequently Asked Questions
What types of precision steel pipes do you specialize in?
We specialize in high-precision cold-drawn seamless pipes, honing pipes, scraper rolling pipes, and precision slender shafts (piston rods), with an annual production capacity exceeding 30,000 tons.
What industries are your products typically used in?
Our precision tubes are widely applied in construction machinery, lifting equipment, metallurgical machinery, plastic machinery, textile machinery, and various industrial fields requiring high-tolerance components.
Do you offer customized processing services?
Yes, we provide full-range customization including CNC machining, scraping/rolling processes, and cold-drawing production. Our 10+ CNC production lines and proprietary technologies enable personalized solutions.
How do you ensure product quality consistency?
We guarantee quality through advanced CNC scraping/rolling machines, automated cold-drawing lines, ISO-certified manufacturing processes, and strict dimensional tolerance control (up to ±0.01mm).
What are the production capabilities for bulk orders?
Key capabilities include 30,000+ tons annual output, complete CNC machining systems, independent R&D with patented technologies, and fast-response customization within 15-30 days.
Do you provide technical support for product selection?
Our engineering team offers free material/design consultation, application-specific recommendations, 24/7 technical support, and detailed CAD drawings/specification guidance.

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