Custom Welded Assemblies – Engineered Since 1993
We produce welded metal parts for automotive, construction, agriculture, and industrial equipment companies worldwide — with ISO 9001 certification, 10 dedicated production lines, and full in-house machining and finishing.
Custom Weldment of metal
Our custom welded metal parts are designed to meet the needs of different industries, using advanced welding technology to ensure that each product has superior quality and precise performance. Whether in the automotive, mechanical, energy, or construction industries, our metal welders provide robust, durable joining solutions.
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Your Trusted Partner for Precision Welding Solutions
From small brackets to complex welded assemblies, Prime combines certified quality, experienced engineers, and real factory capacity to deliver reliable welding solutions for demanding industrial applications.
ISO 9001 Certified Quality
Our rigorous quality control processes ensure every welded part meets international standards and your exact specifications, from base material verification to final inspection.
30+ Years of Expertise
With more than 30 years of welding and fabrication experience, we provide expert guidance and help you optimize designs for manufacturability, durability, and cost-effectiveness.
Flexible Customization
From simple brackets to complex welded frames and housings, we work from your drawings or samples to produce parts tailored to your specific loads, environments, and installation requirements.
Rapid & Reliable Delivery
With 10 dedicated production lines and integrated welding, machining, and finishing, we offer fast, predictable lead times that help you keep projects and maintenance schedules on track.
Competitive Pricing
Our streamlined operations and manufacturing scale allow us to offer top-tier welded assemblies at competitive wholesale prices, without sacrificing material quality or process control.
Industries We Serve
For decades, Prime has supplied custom welding parts to demanding industries worldwide. Our experience ensures reliable performance, long service life, and stable production for your projects.
Automotive & Transportation:
Chassis brackets, engine mounts, sensor housings — requiring fatigue resistance and dimensional stability.
Construction & Heavy Machinery:
Load-bearing frames, hydraulic manifolds — designed for high impact and outdoor corrosion.
Agriculture Equipment:
Reinforced linkages, implement frames — built to withstand abrasive soil and vibration.
Industrial Automation:
Robotic arm bases, structural supports — needing tight flatness and repeatable assembly.
Electronics Enclosures:
Welded cabinets, EMI shields — often with cosmetic finish and grounding requirements.
Aerospace Ground Support:
Lightweight adapters, tooling fixtures — made from aluminum or stainless per customer spec.
General Hot Selling Products
Customized metal weldments can be divided into several main types according to the processing technology, each process has its unique characteristics and application fields. The following are some common types of metal weldments grouped by process and their characteristics and areas of application:
ARC Welding (SMAW)
Features:
- ARC welding is the process by which the arc heats the metal, causing it to melt and join.
- Fast welding speed, wide range of applications, suitable for most metal materials (such as steel, aluminum, etc.) .
- The utility model can be used for welding large thickness metal, and the welded joint has high strength.
Applications:
- Construction industry: steel structure, bridge, building frame, etc. .
- Automotive industry: Automotive chassis, body structure, engine brackets and so on.
- Shipbuilding: hull construction, cabins, etc. .
- Machinery and equipment: large mechanical frame and supporting parts.
TIG Welding
Features:
- Argon arc welding uses inert gas to shield the welding area to ensure that the metal is not oxidized.
- High welding quality, smooth weld, small heat affected zone, suitable for fine welding of thin metal materials.
- Welding process control precision, suitable for precision parts manufacturing.
Applications:
- Aerospace: aircraft structure, engine parts.
- Automotive industry: high-precision body welding, engine parts.
- Precision Instruments: electronic equipment shell, precision instrument bracket.
- Medical Equipment: medical instruments, surgical instruments, etc. .
MIG Welding
Features:
- MIG welding uses an arc to heat the wire and substrate, while shielding gases such as argon and carbon dioxide are used to avoid oxidation.
- Fast welding speed, easy operation, good welding quality, suitable for medium and thick plate materials.
- High strength welded joints for high efficiency mass production.
Applications:
- Automobile Manufacturing: welding of automobile body and chassis.
- Shipbuilding: Hull Construction and large welded parts.
- Heavy Machinery: excavators, cranes and other heavy machinery frame.
- Furniture Manufacturing: metal furniture, decorations, etc. .
Laser Welding
Features:
- Laser welding uses a high-power laser beam to focus on the metal surface, quickly heating the metal and melting it to form a welded joint.
- Welding precision is extremely high, heat affected zone is very small, welding speed is fast.
- Suitable for precision, thin material welding, welding seam clean, smooth.
Applications:
- Electronics industry: mobile phone case, computer accessories, LED lamps and so on.
- Automotive industry: body precision welding, sensors and other small parts.
- Medical industry: high-precision medical instruments, endoscopes, etc. .
- Photovoltaic industry: solar cell modules, photovoltaic panels.
Spot Welding
Features:
- Spot welding is a local welding process, mainly through the electrode pressure and current, so that the local heating of metal to molten state, the formation of welding points.
- Welding speed is very fast, suitable for mass, rapid mass production.
- Less heat input, suitable for welding thin plate materials.
Applications:
- Automotive industry: spot welding body connection, such as doors, roof and bottom, etc. .
- Home appliance industry: Spot Welding Connection of electric appliance shell.
- Electronics: small batteries, electronic component connections, etc. .
Gas Tungsten Arc Welding (GTAW)
Features:
- Similar to conventional TIG welding, it employs a non-consumable tungsten electrode, utilizes argon gas as a shielding gas during welding, and provides precise welding control.
- High welding strength and smooth weld seams make it suitable for the production of precision components.
- Due to its high precision, it is commonly used in the welding of high-value-added products.
Applications:
- Aerospace: welding of aircraft engine parts.
- Nuclear Industry: Welding of nuclear reactor components.
- High-end mechanical manufacturing: welding of high-precision mechanical components.
In Summary
Different welding processes have different advantages and application fields in production. Selecting the appropriate welding process can meet the different needs of various industries for the strength, accuracy and production efficiency of welded parts. Whether it is arc welding, argon arc welding, MIG welding, or laser welding, each process has its unique advantages. Depending on the material properties, the workpiece size, and the environment in which it is used, provide tailor-made solutions.
Raw materials for metal welding parts
Below is a practical material selection table for OEM welded assemblies (GTAW/TIG, GMAW/MIG, spot welding, laser welding). Need a recommendation? Send your drawing + service environment and we’ll suggest the best grade and weld method.
| Material | Common Grades / Standards | Typical Applications | Key Benefits | Welding Notes (Quick Guide) |
|---|---|---|---|---|
| Carbon Steel General structural / brackets |
ASTM A36 / A572 EN S235 / S355 |
Frames, brackets, base plates, guards | Low Cost Easy to Weld Strong | Distortion controlled via fixturing and stitch welding on thin plates. Add coating after welding (powder coat / zinc plating) if corrosion risk. |
| Stainless Steel Corrosion resistance |
304 / 304L (EN 1.4301 / 1.4307) 316 / 316L (EN 1.4401 / 1.4404) |
Food equipment, enclosures, marine hardware, medical supports | Corrosion Resistant Clean Finish | TIG preferred for cosmetic welds; use low-carbon “L” grades to reduce sensitization. Control heat input; post-weld pickling/passivation optional for best corrosion performance. |
| Aluminum Lightweight assemblies |
5052 / 5083 (sheet/plate) 6061-T6 (machined parts) |
Light frames, covers, housings, fixtures | Lightweight Good Corrosion | TIG/MIG with proper shielding gas; oxide removal is critical. Heat can reduce strength in heat-treated alloys (e.g., 6061-T6) near the weld zone. |
| Galvanized Steel Pre-coated corrosion protection |
GI / HDG sheet (zinc-coated) |
Outdoor brackets, HVAC parts, light structures | Corrosion Protection Fast Lead Time | Zinc fumes are hazardous—ensure proper ventilation and PPE. Remove coating near weld area when needed; re-coat/paint after welding to restore protection. |
| High-Strength Alloy Steel Load-bearing parts |
4130 / 4140 (42CrMo4) Q&T options |
Mounts, shafts with welded tabs, heavy-duty brackets | High Strength Wear Resistant | Preheat may be required (depends on thickness/carbon equivalent). Control cooling rate to avoid cracking; PWHT may be recommended for critical parts. |
| Cold-Rolled Steel Thin sheet-metal fabrication |
SPCC / DC01 CR sheet |
Covers, cabinets, sheet assemblies | Good Forming Smooth Surface | Spot welding or short MIG/TIG passes to minimize burn-through. Use backing bar/fixture; deburr edges before welding for cleaner seams. |
| Nickel Alloy Heat / chemical resistance |
Inconel 625 / 718 Hastelloy (selected) |
High-temp fixtures, chemical equipment components | High Temp Chemical Resistant | TIG typically used; strict cleanliness required. Use matching filler; control heat input and interpass temperature for crack resistance. |
Tip: If your assembly requires tight cosmetic appearance, leak-tight seams, or minimal distortion, we can combine TIG for visible joints + spot/laser where suitable, and provide fixtures for repeatability.
The Process Flow & Duration Estimation
The production process of metal welding parts requires precise process control and high-level technology to ensure that the welding parts meet quality standards and meet the special requirements of customers. The following are the main steps in the production of metal weldments:
Step 1: Design and drawing validation
Before production, the engineer will provide the design plan and technical drawing of the welding parts according to the customer’s requirements and design requirements. Design drawings including welding size, shape, material requirements, as well as welding process selection. Ensure that the design conforms to the feasibility of production, and after customer confirmation to the next step.
Step 2: Preparation of materials
According to the design drawings and process requirements, select the appropriate metal materials (such as steel, aluminum, stainless steel, etc.) . In this step, the material is pre-inspected to ensure that its quality meets welding requirements. In addition, the selected materials also need to be cleaned to remove surface dirt, grease, oxides, etc. , to ensure the smooth progress of welding.
Step 3: Cutting and machining of workpieces
The metal material is cut to a shape and size suitable for welding according to the design dimensions. Common cutting methods include laser cutting, plasma cutting, shearing, etc. . After cutting the metal parts usually need further processing, such as grinding, deburring, etc. , to ensure the accurate size of the workpiece and good welding contact surface.
Step 4: Prepare for welding
Before welding, the welding area needs to be inspected and prepared. First of all, check the fit of the welding workpiece, to ensure that the fitting accuracy of the joint part to meet the requirements. Then, according to the selected welding process (such as arc welding, argon arc welding, MIG welding, etc.) , prepare the appropriate welding materials and shielding gas. Make sure the equipment is debugged and the welding environment is in accordance with the safety standard.
Step 5: Welding operation
Cleaning and deburring: after the casting is removed, there may be excess metal or burrs on the surface, which need to be cleaned by grinding, sandblasting, etc. .
Welding Process Control: to ensure that the welding heat input, molten pool size, welding speed, etc. in line with technological requirements.
Welding Monitoring and adjustment: real-time monitoring of welding in the welding process, if there is a problem can be adjusted at any time process parameters.
Step 6: Post treatment of welding
After the welding is completed, the welded joint needs to be post-treated to remove the residues and oxides generated during the welding process to ensure the strength and appearance of the welded parts. Common post-processing methods include:
- Weld cleaning: use brush, sandpaper and other tools to clean the weld slag around the weld.
- Deoxidation: the use of chemical or mechanical methods to remove oxides in the welding area to prevent corrosion.
- Heat treatment: some welded metal parts may need heat treatment, such as annealing, normalizing, etc. , to eliminate stress and improve strength.
Step 7: Quality inspection
After welding, the metal parts need to go through strict quality inspection to ensure that each product is in accordance with the design standards. The testing items include:
- Dimensional inspection: ensure that the dimensions and shape of the weldment are in accordance with the design drawings.
- Weld inspection: through visual inspection, ultrasonic testing, X-ray inspection and other methods to detect the existence of weld porosity, cracks, lack of penetration and other defects.
- Strength test: tensile, bending and other physical properties of welded parts are tested to ensure that its strength and bearing capacity meet the requirements.
Step 8: Packaging and shipping
After quality inspection of qualified welding parts into the final packaging link. According to the customer’s requirements and product characteristics, select the appropriate packaging, to prevent damage during transportation. Packaged products will be shipped according to the order arrangement to ensure timely delivery to customers.
Step 9: Delivery of finished product
Upon completion of all inspection and post-processing, the castings will become the final product, ready to be delivered to the customer or used for assembly.
Want to know how to compress lead times?
In order to shorten the production and delivery cycle, we suggest that you tell us your needs in detail, and we will adjust the strategy flexibly according to your requirements to ensure your production and help you succeed!
Surface Finishing for Custom Welded Parts
Welding strength is only half the story. A controlled finishing process improves appearance, corrosion resistance, coating adhesion, and handling safety—so your welded assemblies arrive clean, consistent, and ready to install.
Surface Prep (Before Any Coating)
We match preparation to your coating system and requirement: spatter removal, bead grinding, edge rounding, degreasing, and controlled roughness for adhesion.
Common Finishes for Welded Assemblies
Pick the finish based on corrosion level, appearance, wear, and cost. We can also follow your specified standard or approved supplier list.
Quality Checks That Prevent Rework
We confirm the finishing result matches your function and visual requirements—especially on edges, weld seams, and coated surfaces.
| Finish | Best For | Notes for Welded Parts |
|---|---|---|
| Powder Coating | Durable cosmetic surface; consistent color & texture | Requires stable prep; weld seam blending improves final appearance. |
| Wet Paint | Flexible color matching; touch-up friendly | Great for large assemblies; consider masking for threads and seats. |
| E-Coat | Even coverage on complex shapes; corrosion base layer | Often used as primer under powder for outdoor/automotive-like environments. |
| Zinc / Nickel Plating | Corrosion protection; fasteners & brackets | Geometry and weld areas may affect uniformity—verify critical fits and threads. |
| Shot Blasting | Surface uniformity; prep for coating | Controls roughness and removes scale; ideal before powder/paint systems. |
| Pickling / Passivation (SS) | Stainless corrosion resistance after welding | Reduces heat tint risk; confirm spec for medical/food-contact applications. |
Can you match our cosmetic standard for visible welds?
Yes. Share a photo reference or cosmetic class requirement. We can blend weld seams, control edge breaks, and align finishing steps to meet your visual acceptance criteria.
How do you protect threads and precision fits during finishing?
We use masking solutions and process planning to protect threads, sealing surfaces, and tight-tolerance areas. Call out no-coat zones on the drawing for best results.
What do you need from us to recommend the right finish?
Send your drawing and tell us the environment (indoor/outdoor, humidity, salt, chemicals), color/texture preference, and any required standard. We’ll suggest a reliable prep + finish combo.
Do you provide sample finishing or approval before mass production?
Yes. We can run sample pieces or a pilot batch for finish approval, then lock the process parameters for stable batch-to-batch consistency.
The Common Pitfalls When Purchasing
Please note that the final cost depends on the customized service you require, the specifications of the raw materials used, the relevant national laws, and the distance of transportation. Take the example of booking a tall container of products:
- Improper material selection: improper material selection may lead to metal welded parts can not reach the strength, corrosion resistance and other performance requirements, affecting the service life.
- Poor design: immature design can lead to difficulties in the production of welded metal parts, increased costs, and delays in delivery.
- Supplier is not reliable: some unprofessional suppliers may not be strict in quality control, resulting in substandard products or delivery is not timely.
Our Certificate
Third-party verification supports supplier approval. Below are our ISO 9001 certificate, SGS test report, and CNIPA utility model patents. If you need a PDF copy for internal review, tell us which document you require.
A Brief Self-Nomination, Why Choose Prime?
Choose Us, you will get cost-effective, high-quality, on-time delivery of metal weldment solutions.
Experience: we have more than 30 years of metal welded parts production experience, can provide high-quality custom metal welded parts for the industry.
Professional team: Our Engineering team is familiar with metal welded parts technology, can provide precise design and production services.
Quality assurance: WE ARE ISO 9001 certified to ensure that every metal welded part meets the highest standards of quality.
Rapid Response: We are committed to providing fast sample production and production cycle, to ensure that your needs can be met in a timely manner.
Global Services: No Matter where you are, we can provide you with quality services to ensure the smooth progress of your business.
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Tell Us Your Requirements
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Receive Tailored Solutions & Quote
Based on your requirements and design, we’ll provide a custom solution and send you a detailed quote within 24 hours.
Approve for Production
Once you approve the design and quote, we’ll begin mass production and take care of the shipping, ensuring timely delivery.
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