Long Description
We specialize in customized large heavy duty steel structure frame and precision metal welding parts fabrication for heavy machinery, engineering construction, mining equipment, industrial infrastructure and other high-load application scenarios. Adopting premium thick high-strength structural steel plates and profiles, we carry out strict whole-process quality control from raw material selection to finished product delivery, ensuring every fabricated part meets extreme working condition requirements.
Our fabrication service supports full customization including structural design, 3D modeling, FEA stress analysis, dimension customization and surface treatment optimization. Equipped with advanced CNC cutting equipment, professional welding fixtures and automatic welding machines, we adopt full penetration MIG/SAW/SMAW welding processes to guarantee firm, crack-free welding joints. All finished products undergo mandatory stress relief heat treatment and full-range non-destructive testing, effectively eliminating welding residual stress, avoiding long-term deformation and cracking, and greatly prolonging service life.
With mature fabrication technology and complete quality management system, we provide one-stop customized solutions from design optimization, proofing, mass production to packaging and shipping. Whether it is oversized steel structure frames, special-shaped metal welding parts or high-precision structural components, we can meet personalized engineering needs with stable quality and reliable performance.
Key Specifications
| Material | Q355B, S355JR, A572 Grade 50, Q235B, NM400/NM450 wear-resistant steel, stainless steel (customizable per requirement) |
| Steel Thickness | 8mm–60mm (oversized thick plate fabrication supported) |
| Welding Process | MIG, SAW, SMAW full penetration welding, compliant with AWS D1.1, EN welding standards |
| Tolerance | ±0.5mm–±1mm (precision machining calibration available) |
| Surface Treatment | Sandblasting Sa2.5/Shot blasting + epoxy primer + polyurethane topcoat / hot-dip galvanizing / powder coating (customizable) |
| Inspection Items | Raw material MTC, UT/MT non-destructive testing, dimensional inspection, stress relief test |
| MOQ | 1 PC (supports prototype & mass production) |
| Lead Time | 15–45 days (depends on product size & process complexity) |
| Customization Type | OEM/ODM, per customer 2D/3D drawings, sample customization |
Features & Advantages
1. Ultra-high structural strength & load-bearing capacity, adaptable to extreme heavy-load working conditions
2. Full penetration welding process, stable welding joints with high tensile and impact resistance
3. Integral stress relief heat treatment, thoroughly eliminates residual stress, no long-term deformation
4. 100% NDT inspection & complete material certification, full quality traceability
5. Professional customized design & FEA analysis support, optimize structural performance
6. Multi-layer heavy-duty anti-corrosion surface treatment, suitable for outdoor, humid & harsh environments
7. Strict quality control system, compliant with international welding & quality standards
Raw Materials
Main Structure: Q355B/S355JR/A572 Grade 50 high-strength structural steel
Wear & Impact Resistance Parts: NM400/NM450/NM500 wear-resistant steel plate
Connection Fasteners: Grade 8.8/10.9/12.9 high-strength bolts, galvanized carbon steel fasteners
Special Materials: Stainless steel, low-alloy high-strength steel (customizable per project needs)
Full Fabrication Process Flow
Raw material inspection & acceptance → CNC laser/plasma/flame cutting → Fixture positioning & assembly → Full penetration precision welding → Stress relief heat treatment → Shot blasting/sandblasting derusting → Precision machining & calibration → Surface anti-corrosion coating → 100% dimensional & NDT inspection → Packaging & warehousing
Main Applications
- Heavy engineering machinery frames, excavator/loader/crane steel structure frames
- Mining equipment chassis, support frames, wear-resistant welding parts
- Industrial large equipment base, steel platform frame, support beam
- Port logistics heavy-duty steel structure, container fixing frame
- Construction engineering steel structure parts, bridge steel components
- Customized large metal structural parts for industrial production lines
Why Choose Our Custom Fabrication Service
1. 15+ years of heavy steel structure welding fabrication experience, professional technical team
2. ISO 9001:2015, ISO 3834-2, EN 1090-1, AWS D1.1 certified, standardized production management
3. Complete supporting equipment, capable of fabricating oversized & complex structural parts
4. Full material traceability, complete MTC, inspection reports & export documentation
5. One-stop custom solution: design, processing, inspection, packaging & shipping integrated service
6. Flexible production mode, supports small-batch proofing & large-scale mass production
7. Professional after-sales technical support, timely response to installation & use problems
Certifications
ISO 9001:2015, ISO 3834-2 (Welding Quality Assurance), EN 1090-1 EXC3, AWS D1.1 (Structural Welding Standard)
Packaging & Shipping
- Internal: VCI anti-rust film wrapping + foam buffer protection
- External: Export-grade reinforced wooden crate/steel frame fixation (customizable for oversized parts)
- Shipping: Sea freight (20ft/40ft/40HQ container), land transportation; supports designated logistics forwarder
FAQ
Q: Can you fabricate products according to our 2D/3D drawings?
A: Yes, we accept custom fabrication based on customer-provided drawings, technical parameters or samples.
Q: Do you provide FEA stress analysis and structural optimization services?
A: Yes, our technical team can provide professional FEA analysis and structural optimization to improve product performance.
Q: Can you issue complete quality inspection reports and material certificates?
A: Yes, we provide full MTC, NDT inspection reports, dimensional test reports and complete export documents.
Q: Do you support on-site installation guidance or after-sales maintenance?
A: Yes, we provide remote installation guidance and corresponding after-sales technical support services.
Product Keywords
Custom heavy duty steel structure frame, large metal welding parts, heavy steel fabrication, full penetration welding parts, custom structural steel welding, high-strength steel frame fabrication, engineering machinery steel parts, heavy metal welding service
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