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Our Custom Fabricated Tubing offers precision bent, welded, and shaped tubes tailored for your structural, industrial, and mechanical applications.
Our Custom Fabricated Tubing offers precision bent, welded, and shaped tubes tailored for your structural, industrial, and mechanical applications.
This includes:
·Carbon steel (ASTM A513 1020, ASTM A519 4140, EN 10305-2 E235)
·Stainless steel (AISI 304, AISI 316)
·Custom dimensions: OD, ID, wall thickness, and length
·Custom shapes: Round, square, rectangular, and complex profiles
·Welding and finishing: MIG/TIG, polished, coated, or galvanized
·Ideal for hydraulic systems, industrial machinery, automotive structures, construction frameworks, and other applications where standard tubing cannot meet design requirements.
Typical Materials & Grades
|
Steel Grade |
Features |
Example Sizes / Applications |
|
ASTM A513 1020 |
Carbon steel, yield ~350 N/mm², tensile ~420 N/mm² |
Ø50.8 × 2 mm, round, automotive & structural |
|
ASTM A519 4140 |
High-strength alloy, yield ~655 N/mm², tensile ~862 N/mm² |
Ø76.2 × 3 mm, heavy-duty machinery |
|
EN 10305-2 E235 |
Precision carbon steel, lightweight applications |
50 × 50 × 2 mm, square |
|
AISI 304 (EN 1.4301) |
Stainless steel, corrosion-resistant |
Ø50.8 × 2 mm, round, construction & industrial |
|
AISI 316 (EN 1.4401) |
Enhanced corrosion resistance for marine/chemical |
60 × 40 × 2 mm, rectangular |
These grades support applications in automotive, construction, industrial, and marine environments, following ASTM and EN standards.
Why Choose Our Custom Fabricated Tubing?
·Flexible Design: Bent and welded to precise round, square, or rectangular shapes
·High Strength: Carbon and alloy steel options for heavy-duty applications
·Corrosion Resistance: Stainless steel options for harsh environments
·Precision Tolerances: e.g., Ø50.8 mm OD ±0.1 mm, 2 mm WT ±10%
·Versatile Sizes & Shapes: Round, square, and rectangular profiles
·Cost-Effective Customization: High-quality fabrication at competitive costs
Common Sizes and Shapes
|
Profile |
Typical Sizes |
Notes |
|
Round |
Ø12.7–101.6 mm |
e.g., Ø50.8 × 2 mm for automotive frames |
|
Square |
20 × 20 mm to 100 × 100 mm |
e.g., 50 × 50 × 2 mm for structural supports |
|
Rectangular |
40 × 60 mm to 100 × 60 mm |
e.g., 60 × 40 × 2 mm for machinery frames |
|
Wall Thickness |
1–5 mm |
Dependent on OD/ID and load requirements |
|
Length |
Up to 12 m |
Custom-cut per customer specification |
Manufacturing Process
1. Tube Selection: Cold-drawn or hot-rolled, based on steel grade
2. Forming: Shaping into round, square, rectangular, or custom profiles
3. Bending: CNC precision bending for exact angles and radii
4. Welding: MIG, TIG, or ERW welding for strong, seamless joints
5. Surface Finishing: Polished (Ra ≤0.8 µm for stainless, Ra ≤1.6 µm for carbon steel) or coated (oiled, galvanized)
6. Quality Testing: Dimensional checks, weld integrity, and non-destructive testing
Material Specifications
ASTM A513 1020 (Max %)
·C: 0.18–0.23 | Mn: 0.30–0.60 | P: 0.04 | S: 0.05
·Mechanical: Yield ~350 N/mm², Tensile ~420 N/mm², Elongation 15%
AISI 304 (Max %)
·C: 0.08 | Mn: 2.0 | P: 0.045 | S: 0.03 | Cr: 18–20 | Ni: 8–10.5
·Mechanical: Yield ~205 N/mm², Tensile 515–690 N/mm², Elongation 40%
Tolerances (per ASTM A513)
·OD (Round): ±0.1 mm (Ø12.7–76.2 mm), ±0.15 mm (>76.2–101.6 mm)
·Dimensions (Square/Rectangular): ±0.15 mm
·WT: ±10%
·Length: ±5 mm
Delivery Conditions
·Cold-Drawn, Annealed, or Normalized
·Surface Conditions: Polished, oiled, or galvanized
Applications
·Automotive: Bent exhaust systems, roll cages, chassis components
·Construction: Structural supports, railings, frameworks
·Industrial: Machinery frames, conveyor systems, custom fittings
·Marine / Chemical: Corrosion-resistant piping and fittings
·Lightweight / Precision Components: Components with minimal secondary use
Pricing & Availability
·Estimated: $2–$6 per kg (depends on volume, region, bending complexity)
·Contact for custom quotes at [insert contact details]
Quality Assurance
·Complies with ASTM A513, A519, EN 10305-2 standards
·Certified DIN EN 10204 3.1 for chemical composition, mechanical properties, and dimensional accuracy
·Non-destructive testing, weld inspection, and tensile testing included
Suao is a professional manufacturer of high-precision cold drawn steel tubes, hydraulic tubes, and mechanical structure tubes, integrating R&D, production, inspection, and global sales. We operate two major production facilities covering over 36,000 square meters, with more than 200 employees and an annual output of 50,000+ tons, supplying customers across major industrial markets worldwide. As Suppliers of Custom Fabricated Tubing – Steel / Stainless Steel, Bent & Welded, Customized Dimensions and Shapes, our integrated manufacturing capabilities include cold drawing, heat treatment, straightening, finishing, cutting, chamfering, and surface treatment. These are supported by a full range of advanced equipment for non-destructive testing, chemical analysis, and online dimensional monitoring—ensuring every tube meets stringent quality standards. We invest continuously in automation and smart manufacturing systems to enable flexible, high-mix, low-volume production. Custom Custom Fabricated Tubing – Steel / Stainless Steel, Bent & Welded, Customized Dimensions and Shapes. Our products are widely used in construction machinery, hydraulic systems, automotive parts, wind energy, shipbuilding, railways, and oil & gas sectors. Certified to ISO 9001, ISO 14001, CE, and RoHS standards, Hongli is more than a manufacturer—we are a trusted long-term partner for global industrial clients.
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