Description
Direct mill supply, full MTC traceability — Our own production line manufactures A519 AISI 1020 cold drawn seamless steel pipe from billet to finished tube, eliminating third-party material gaps and ensuring every heat number is documented.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | A519 AISI 1020 Cold Drawn Seamless Carbon Steel Pipe |
| Product Type | Cold Drawn Seamless Steel Pipe |
| Steel Grade | AISI 1020, Q195, Q235, Q345, SS400, 10#-45#, 16Mn, A53-A369, ST35-ST52 |
| Standard | ASTM A519, ASTM A53, ASTM A106, API 5L, GB/T 3091, GB/T 13793, GB/T 9711, BS EN10219, BS EN10296, BS 6323, ASME B36.10M |
| Section Shape | Round |
| Outer Diameter | 10-700 mm |
| Wall Thickness | Cold drawn 1~4.0 mm / Hot rolled 4~20 mm |
| Length | 1-12 m |
| Technique | Cold Drawn / Hot Rolled / Cold Rolled |
| Surface Treatment | Slightly Oiled / Hot Rolled / Zinc Coated (200-700 g/m²) |
| Tolerance | ±1% |
| Ends | Plain / Beveled (per standard) |
| Application | Fluid transport / Structural applications / Machinery / Construction building material / Hydraulic systems / Gas and oil pipelines |
| MOQ | 1 Ton |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Hydraulic & Pneumatic Systems | Cylinder barrels, piston rods, honed tube assemblies for precision hydraulic circuits |
| Machinery Manufacturing | Shaft sleeves, gear housings, conveyor roller frames, machining blanks |
| Structural & Construction | Equipment support frames, machinery bases, light structural columns |
| Fluid & Gas Transport | Low-pressure fluid lines, instrument tubing, sampling lines |
| Industrial Infrastructure | Platform handrails, equipment skids, pipe rack supports |
What Wall-Thickness Tolerance Costs on a Cold Drawn Pipe Order
A ±1% tolerance on cold drawn seamless steel pipe is the difference between a machined component that passes inspection and one that gets scrapped.
Overseas buyers sourcing A519 AISI 1020 cold drawn seamless steel pipe from China frequently discover that wall thickness varies beyond acceptable limits — not because the mill lied, but because the material came through two or three intermediaries before reaching the job site. Each handoff adds uncertainty: the original mill test certificate gets detached from the physical tube, and negative tolerance stacking turns a specified 3.0 mm wall into 2.6 mm on the caliper. For hydraulic cylinder applications where bore honing depends on consistent OD and wall, this is not a paperwork problem — it is a scrap bin problem. [NEED_CITE: cold drawn seamless tube dimensional tolerance requirements for hydraulic applications]
Precision Matching for Hydraulic and Machined Components
AISI 1020 cold drawn pipe holds its ±1% OD and wall tolerance through the drawing process, making it the default choice for hydraulic cylinder barrels and components that go straight into CNC lathes without secondary sizing. When a buyer specifies A519 AISI 1020 cold drawn seamless steel pipe for honed tube applications, the cold reduction work-hardens the surface and produces a smooth finish that reduces honing cycle time. Our mill controls drawing reduction ratios per heat to maintain consistent mechanical properties across the full 10-700 mm OD range.
Engineering Compliance and Certification Path
Cold drawn seamless pipe to ASTM A519 must meet the chemical composition limits for AISI 1020 — carbon 0.18-0.23%, manganese 0.30-0.60% — and the mechanical requirements for the specified condition. For projects in the EU, the equivalent EN 10219 or EN 10305-1 standards apply, and customs authorities increasingly request CE marking documentation alongside the mill test certificate. [NEED_CITE: EN 10305-1 cold drawn seamless steel tube requirements] Buyers specifying Q345 or 16Mn grades for structural frames need to confirm that the fabricator can supply full chemical and mechanical traceability per heat number, not just a generic compliance statement. Our documentation package includes WPS, PQR, dimensional inspection reports, and coating thickness records for every shipment.
Steel Grade Selection and Cold Drawing Process
AISI 1020 is a low-carbon drawing grade — its carbon content sits low enough to allow significant cold reduction without cracking, yet high enough to deliver machinability for shaft and sleeve applications. Moving up to AISI 4130 or 4140 increases tensile strength for higher-pressure hydraulic systems but requires annealing between drawing passes. The Q-series grades (Q195 through Q345) follow the Chinese GB standard system and map roughly to S-series European grades in yield strength tiers. Cold drawing itself increases yield strength through strain hardening — a hot rolled tube at 250 MPa yield can reach 350+ MPa after cold drawing, depending on reduction ratio. Surface options range from slightly oiled for machining stock to hot dip galvanized at 200-700 g/m² for corrosion-exposed installations. [NEED_CITE: cold drawing effect on mechanical properties of low carbon steel]
Hidden Costs of Unverified Material Source
When a cold drawn pipe arrives at the job site without a traceable heat number linking it to a specific mill test certificate, the buyer absorbs three risks: customs holds due to missing MTC, rejection by the project’s third-party inspector, and — worst case — structural failure traced back to off-grade chemistry. An A519 AISI 1020 cold drawn seamless steel pipe sourced through a trader who cannot provide original mill documentation forces the buyer to either pay for independent chemical analysis or accept the material blind. Neither option is cheap, and both delay the project schedule. [NEED_CITE: material traceability requirements for ASTM A519 seamless mechanical tubing]
Why Buyers Source A519 AISI 1020 Cold Drawn Seamless Steel Pipe From Our Mill
We operate our own steel production facility with dedicated cold drawing lines, which means the A519 AISI 1020 cold drawn seamless steel pipe you order comes from a single source — raw billet to finished tube under one quality system. Our in-house laboratory issues mill test certificates with full chemical composition and mechanical test results per heat number, and we maintain 2,800+ specifications in stock for immediate dispatch. Every order ships with complete export documentation: WPS, PQR, dimensional inspection reports, and coating thickness records. We accept third-party inspection from SGS, BV, or TÜV before shipment, and our loading team specializes in oversized and long-length pipe packaging for ocean freight.
Documentation & Compliance
- Mill test certificate documenting AISI 1020 chemical composition (C 0.18-0.23%, Mn 0.30-0.60%) and mechanical properties per ASTM A519, traceable by heat number
- CE certificate for EN 10219 / EN 10305-1 compliance when shipping cold drawn seamless pipe to EU markets
- ISO 9001 quality management system certificate covering the full cold drawing and inspection process
- SGS or BV third-party inspection report available for wall thickness, OD tolerance, and surface coating verification before shipment
- Material traceability report linking each pipe bundle to its original heat number, chemical analysis, and mechanical test results
- Complete customs documentation including packing list, bill of lading, and certificate of origin for destination-country clearance
Packaging, Loading & Delivery
- Cold drawn AISI 1020 pipes bundled with steel strips and edge protectors to preserve the oiled or galvanized surface finish during ocean transit
- Galvanized tubes (200-700 g/m² zinc coating) wrapped in waterproof paper with plastic caps on both ends to prevent moisture damage and coating abrasion
- Cut-to-length service available for 1-12 m pipes, with custom lengths packed separately and marked by heat number for site identification
- Container loading optimized for 10-700 mm OD range — small-diameter cold drawn tubes nested efficiently to maximize 20ft and 40ft container payload
- Heat number and steel grade stenciled on each pipe end, with bundle tags matching the mill test certificate for immediate site verification
- FOB, CIF, and DDP terms available with professional oversized cargo loading and lashing for long-length pipe shipments
Start Your Cold Drawn Pipe Inquiry
Submit your project drawings, required steel grade (AISI 1020, Q345, ST35-ST52), OD and wall thickness specifications, and destination port — our engineering team responds within 24 hours with a detailed quotation including material cost, fabrication, coating, packing, and shipping. We provide shop drawing review, material optimization recommendations, and a complete mill test certificate package before production begins.
Request A519 AISI 1020 Cold Drawn Seamless Steel Pipe Quotation
Send your specifications to admin@xjystructure.com or contact us via WhatsApp at +86 188 5315 7756 for pricing, MTC samples, and production lead time confirmation.
Frequently Asked Questions
Q: What is the difference between AISI 1020, ASTM A106 Grade B, and GB 10# steel grades?
A: AISI 1020 is a low-carbon steel grade specified by chemical composition (C 0.18-0.23%) under ASTM A519 for mechanical tubing. ASTM A106 Grade B is a carbon steel pipe grade for high-temperature service with similar but not identical chemistry. GB 10# is the Chinese national standard equivalent with comparable carbon content. All three can be supplied as cold drawn seamless pipe, but the applicable standard determines the testing requirements and documentation format.
Q: When should I specify cold drawn versus hot rolled seamless pipe?
A: Cold drawn pipe delivers tighter dimensional tolerance (±1% on OD and wall), smoother surface finish, and higher yield strength through strain hardening — making it the correct choice for hydraulic cylinders, machined components, and applications requiring precision fit-up. Hot rolled seamless pipe is more economical for larger OD and heavier wall thickness where tight tolerance is not critical, such as structural columns and fluid transport lines.
Q: Can you provide third-party inspection and MTC per EN 10204 3.1?
A: Yes. We issue mill test certificates conforming to EN 10204 3.1 type, documenting chemical composition and mechanical test results per heat number. Third-party inspection from SGS, BV, or TÜV is available before shipment to verify wall thickness, OD tolerance, surface coating, and dimensional accuracy against the purchase order specifications.
Q: What is the MOQ for custom OD and wall thickness combinations?
A: The minimum order quantity is 1 Ton. For standard A519 AISI 1020 cold drawn sizes in our 2,800+ specification range, we can ship from stock. Custom OD and wall thickness combinations outside standard range may require a production run, and we will confirm the minimum tonnage and lead time during quotation.
Q: How do you handle packing and loading for long-length cold drawn pipes to avoid damage during ocean freight?
A: Cold drawn pipes are bundled with steel strips and fitted with edge protectors to prevent coating abrasion and end damage. Galvanized tubes receive additional waterproof paper wrapping and plastic end caps. Our loading team uses specialized cradles and lashing systems for long-length pipes (up to 12 m) to prevent shifting and contact damage during container or breakbulk shipment.
