Get an Instant Quote

Reliable Sheet Metal Welding Services

Metal Welding is fundamental for energy, shipbuilding, and construction sectors. Common assemblies:

  • Pressure containment vessels
  • Pipeline systems
  • Structural support beams
  • Marine vessel hulls
  • Industrial storage tanks
  • Power plant components

Start A New Metal Welding Quote

Start to Upload Your Files
Drag and drop file here or click the button below or
STEP | STP I SLDPRT I IPT I PRT I SAT FLES
All uploads are secure and confidential.

Advanced Manufacturing Capabilities

Integrating Engineering Expertise, Advanced Manufacturing Processes, and Flexible Production Capabilities to Support Product Development from Initial Prototypes to Scalable Production.

Gas Metal Arc Welding

GMAW (MIG) uses a continuous wire electrode and shielding gas (argon/CO₂) for versatile, user-friendly welding of steel, aluminum, and stainless steel. It’s ideal for high-speed applications with minimal cleanup.

Gas Tungsten Arc Welding

TIG welding employs a non-consumable tungsten electrode and inert gas (e.g., argon) for precise, high-quality welds on metals like aluminum and titanium. Preferred for aesthetic finishes and critical applications.

Shielded Metal Arc Welding

SMAW (“stick welding”) uses flux-coated electrodes to create welds, eliminating the need for external gas shielding. It’s adaptable for steel, stainless steel, and cast iron, even in rough conditions.

Flux-Cored Arc Welding

FCAW utilizes flux-filled wire for self-shielding, enabling deep penetration and high deposition rates. Commonly used in construction and shipbuilding for thick materials or outdoor work, delivering consistent weld quality.

Our Advanced Metal Welding Parts

Certified to AWS D1.1/ASME IX standards, we provide TIG, MIG, spot, and laser welding for structural and hermetic assemblies. Our robotic welding cells achieve 0.2mm repeatability on stainless steel, aluminum, and exotic alloys, complemented by X-ray/UT testing for critical joints in pressure vessels and load-bearing frames.

Structural Welding
  • 10+ Years of Metal Welding Services
  • Tolerances as tight as ±0.0012 in.（0.03mm）
  • Part size: ≤3000MM*1500MM
  • Lead times as fast as 3 working days
Get a Quote
Enclosure & Appearance Welding
  • 10+ Years of Metal Welding Services
  • Tolerances as tight as ±0.0012 in.（0.03mm）
  • Part size: ≤3000MM*1500MM
  • Lead times as fast as 3 working days
Get a Quote
Precision & Custom Welding
  • 10+ Years of Metal Welding Services
  • Tolerances as tight as ±0.0012 in.（0.03mm）
  • Part size: ≤3000MM*1500MM
  • Lead times as fast as 3 working days
Get a Quote

Metal Welding Materials

Joining dissimilar metals (stainless to carbon steel) via TIG/MIG/spot welding with X-ray certified seams. Expert in aluminum 6063 welding (50-200A parameters) and brazing copper alloys for heat exchangers and pressure vessels.

Metals

Lightweight, high thermal conductivity, Excellent Machinability, Superior Dimensional Stability, Tight-Tolerance Capable, Perfect for Complex CNC Milling and Turning.
Price: $0
Lead Time: < 5 days
Tolerances: ±0.005″ (±0.125mm)
Max part size: 200 cm x 80 cm x 100 cm

Extremely lightweight (67% aluminum density), good vibration damping, requires surface treatment.
Price: $0
Lead Time: < 10 days
Tolerances: ±0.005″ (±0.125mm)
Max part size: 200 cm x 80 cm x 100 cm

Excellent malleability, corrosion-resistant, decorative finishes, suitable for intricate stamped panels.
Price: $0
Lead Time:
Tolerances:
Max part size:

High electrical conductivity, soft yet work-hardening, requires annealing during multi-stage forming.
Price: $0
Lead Time:
Tolerances:
Max part size:

Cost-effective formability, high strength-to-weight ratio, requires anti-rust coating for exposed edges.
Price: $0
Lead Time:
Tolerances:
Max part size:

Corrosion-resistant, retains strength after welding, maintains integrity in harsh environments.
Price: $0
Lead Time:
Tolerances:
Max part size:

Aerospace-grade strength, biocompatible, seawater corrosion resistance, difficult to machine.
Price: $0
Lead Time: < 10 days
Tolerances: ±0.005″ (±0.125mm)
Max part size: 200 cm x 80 cm x 100 cm

Lightweight, high thermal conductivity, Excellent Machinability, Superior Dimensional Stability, Tight-Tolerance Capable, Perfect for Complex CNC Milling and Turning.
Price: $0
Lead Time: < 5 days
Tolerances: ±0.005″ (±0.125mm)
Max part size: 200 cm x 80 cm x 100 cm

Plastics

Fast-flowing melt, low shrinkage (0.4-0.7%), requires pre-drying (80°C/4h), ideal for automotive dashboards and consumer electronics housings.
Price: $0
Lead Time:
Tolerances:
Max part size:

High melt viscosity (300-350°C processing), moisture-sensitive (0.02% max), optical-grade clarity for LED lenses and medical device components.
Price: $0
Lead Time:
Tolerances:
Max part size:

Crystallization-sensitive cooling (80-120°C mold), high dimensional stability, precision gears and fuel system valves.
Price: $0
Lead Time:
Tolerances:
Max part size:

Moisture absorption (2.5-3.5%) requires post-molding annealing, self-lubricating bushings and automotive cable ties.
Price: $0
Lead Time:
Tolerances:
Max part size:

Extreme processing temps (380-400°C), low shrinkage (0.1-0.3%), aerospace bushings and surgical sterilization trays.
Price: $0
Lead Time:
Tolerances:
Max part size:

Heat distortion resistance (150°C), electrical insulation, glass-fiber reinforced automotive connectors.
Price: $0
Lead Time:
Tolerances:
Max part size:

Aerospace-grade strength, biocompatible, seawater corrosion resistance, difficult to machine.
Price: $0
Lead Time: < 10 days
Tolerances: ±0.005″ (±0.125mm)
Max part size: 200 cm x 80 cm x 100 cm

Lightweight, high thermal conductivity, Excellent Machinability, Superior Dimensional Stability, Tight-Tolerance Capable, Perfect for Complex CNC Milling and Turning.
Price: $0
Lead Time: < 5 days
Tolerances: ±0.005″ (±0.125mm)
Max part size: 200 cm x 80 cm x 100 cm

Low melt strength (LDPE: 160-240°C), high flow rate for thin-wall containers and chemical-resistant pipeline fittings.
Price: $0
Lead Time:
Tolerances:
Max part size:

Low density (0.9g/cm³), living hinge capability, disposable syringes and automotive HVAC ducts.
Price: $0
Lead Time:
Tolerances:
Max part size:

High mold temperature (60-80°C) reduces internal stress, low warpage, replaces glass in automotive taillights and cosmetic packaging.
Price: $0
Lead Time:
Tolerances:
Max part size:

Surface Finishes by Material

Different materials require different finishing processes. Explore the most suitable surface finishes for aluminum, stainless steel, titanium, brass, copper, engineering plastics, and more to achieve the ideal balance of protection, appearance, and performance.

As Machined
As Machined
Description: Standard finish with surface roughness of 3.2 μm (126 μin), removes sharp edges and deburrs parts cleanly. Key Use: Functional parts requiring no post-processing (e.g., brackets, gears). Process Tolerance: Dimensional ±0.1 mm, Ra 3.2±0.5 μm Process Specifications: ISO 2768-m standard, burr height ≤0.05 mm
Anodizing
Anodizing
Description: Electrochemical oxide layer for corrosion resistance and aesthetics. Process Compatibility: Post-machining surface treatment Key Use: Aerospace components, consumer electronics (e.g., phone frames). Process Tolerance: Coating thickness 10-25 μm±2 μm, color consistency ΔE≤1.5 Process Specifications: MIL-A-8625 or ISO 7599, sealing pH 5.5-6.5
Alodine
Alodine
Description: Chemical film for corrosion protection and paint adhesion. Process Compatibility: Post-cleaning chemical immersion Key Use: Aviation and automotive electrical housings. Process Tolerance: Film thickness 0.5-3 μm, visual uniformity Process Specifications: Immersion time 3-10 min, bath temp. 20-30℃
Black Oxide
Black Oxide
Description: Thin magnetite layer for corrosion resistance and reduced glare. Process Compatibility: Post-machining chemical treatment Key Use: Tools, firearms, automotive fasteners. Process Tolerance: Coating thickness 0.5-1.5 μm, salt spray ≥24 hrs Process Specifications: Alkaline bath pH 13-14, process time 5-30 min
Brushed Finish
Brushed finish
Description: Linear abrasive finish for decorative texture. Process Compatibility: Manual/CNC abrasive belts Key Use: Appliance panels, architectural trims. Process Tolerance: Texture depth 0.05-0.2 mm, angle deviation ≤5° Process Specifications: Abrasive belt grit 80-240, feed speed 10-30 m/min
Etching
Etching
Description: Chemical/mechanical removal for micro-texturing or marking. Process Compatibility: Laser/chemical masking Key Use: Circuit boards, decorative logos. Process Tolerance: Etch depth 0.01-0.5 mm±5%, alignment ±0.1 mm Process Specifications: Etchant concentration 10-30%, laser power 20-100 W
Electroless Plating
Electroless Plating
Description: Uniform metal coating (e.g., nickel) without electricity. Process Compatibility: Chemical bath deposition Key Use: Wear-resistant industrial valves, connectors. Process Tolerance: Coating thickness 5-50 μm±5%, porosity ≤5/cm² Process Specifications: Bath temp. 85-95℃, pH 4.5-5.5
Electroplating
Electroplating
Description: Electrochemical metal coating (e.g., chrome, zinc) for durability. Process Compatibility: Post-machining electrodeposition Key Use: Automotive trim, jewelry. Process Tolerance: Coating thickness 5-25 μm±2 μm, adhesion ≥4B (ASTM B571) Process Specifications: Current density 1-10 A/dm², bath temp. 40-60℃
Electrophoretic Coating
Electrophoretic
Description: Polymer coating via electric field for corrosion resistance. Process Compatibility: Post-cleaning immersion Key Use: Automotive frames, HVAC components. Process Tolerance: Coating thickness 15-30 μm±3 μm, edge coverage ≥80% Process Specifications: Voltage 50-300 V, cure 160-200℃×20 min
Electropolishing
Electropolish
Description: Electrochemical finishing for smoother, cleaner, corrosion-resistant surfaces with a bright finish. Process Compatibility: Post-machining. Key Use: Medical, pharmaceutical, semiconductor, and aerospace parts. Process Tolerance: Material removal 5–25 μm, Ra 0.1–0.4 μm. Process Specifications: ASTM B912 or ISO 15730 with controlled electrolyte and current density.
Grinding
Grinding
Description: Precision abrasive finish for tight tolerances. Process Compatibility: Surface/cylindrical grinding Key Use: Bearing races, hydraulic shafts. Process Tolerance: Dimensional ±0.005 mm, Ra 0.4-0.8 μm Process Specifications: Wheel grit 60-120, coolant flow 5-20 L/min
Heat Treatment
Heat Treatment
Description: Thermal process to alter material hardness/toughness. Process Compatibility: Post-machining quenching/tempering Key Use: Gears, cutting tools. Process Tolerance: Hardness HRC 45-60±2, distortion ≤0.1% Process Specifications: Quench temp. 800-1000℃, temper time 1-4 hrs
Knurling
Knurling
Description: Diamond or linear pattern for improved grip. Process Compatibility: CNC lathe rolling Key Use: Handles, adjustment knobs. Process Tolerance: Pattern depth 0.2-0.5 mm, pitch ±0.05 mm Process Specifications: Roller pressure 200-500 N, feed 10-50 mm/min
Laser Engraving
Laser Engraving
Description: Permanent marking via laser ablation. Process Compatibility: Post-processing laser systems Materials: Metals, plastics, wood Key Use: Serial numbers, branding on industrial parts.
Overmolding
Overmolding
Description: Molding soft material (TPU/silicone) over rigid inserts. Process Compatibility: Injection molding Materials: Plastics, metals (as inserts) Key Use: Ergonomic handles, waterproof seals. Process Tolerance: Overmold thickness 1-5 mm±0.2 mm, bond strength ≥5 MPa Process Specifications: Injection pressure >5 MPa, mold temp. 40-80℃
Polishing
Polishing
Description: Mirror-like finish via abrasive compounds. Process Compatibility: Manual/robotic buffing Key Use: Medical instruments, luxury fixtures. Process Tolerance: Ra 0.025-0.1 μm, gloss ≥90 GU Process Specifications: Wheel speed 1000-3000 rpm, compound grit 2000-5000
Passivation
Passivation
Description: Acid treatment to remove free iron and enhance corrosion resistance. Process Compatibility: Post-cleaning chemical immersion Key Use: Surgical tools, food processing equipment. Process Tolerance: Film thickness 0.001-0.01 μm, salt spray ≥96 hrs Process Specifications: Nitric acid 20-50%, process time 20-60 min
Powder Coating
Powder Coating
Description: Electrostatic polymer powder cured into durable film. Process Compatibility: Post-cleaning spray and bake Key Use: Outdoor furniture, automotive wheels. Process Tolerance: Coating thickness 60-120 μm±10 μm, ΔE≤1.0 Process Specifications: Voltage 30-90 kV, cure 180-200℃×15 min
Phosphating
Phosphating
Description: Phosphate layer for lubrication and paint adhesion. Process Compatibility: Chemical immersion Key Use: Engine components, firearm parts. Process Tolerance: Coating weight 2-5 g/m², crystal size ≤5 μm Process Specifications: Bath pH 2-4, process temp. 40-70℃
Painting
Painting
Description: Liquid coating for color and protection. Process Compatibility: Spraying/dipping Materials: Metals, plastics Key Use: Consumer electronics, automotive body panels. Process Tolerance: Coating thickness 20-50 μm±5 μm, adhesion ≥3B (ASTM D3359) Process Specifications: Spray pressure 0.3-0.6 MPa, cure 80-120℃×30 min
Sandblasting
Sand blasting
Description: Abrasive jet finish for uniform matte texture. Process Compatibility: Post-machining blasting Materials: Metals, glass, stone Key Use: Architectural facades, engine blocks. Process Tolerance: Ra 1.6-6.3 μm, coverage ≥95% Process Specifications: Grit size 80-120, air pressure 0.4-0.7 MPa
Teflon Coating
Teflon Coating
Description: Non-stick, chemical-resistant polymer layer. Process Compatibility: Spraying/baking Materials: Metals, ceramics Key Use: Cookware, chemical valves. Process Tolerance: Coating thickness 15-50 μm±5%, non-stick cycles ≥1000 Process Specifications: Sintering 360-400℃, cure time 10-30 min
Tumbling
Tumbling
Description: Barrel polishing for edge rounding and deburring. Process Compatibility: Vibratory/rotary barrels Materials: Metals, plastics Key Use: Jewelry, small hardware components. Process Tolerance: Edge radius R0.1-0.5 mm, weight loss ≤1% Process Specifications: Media size 3-10 mm, speed 10-30 rpm, time 1-12 hrs
SPI Finish
SPI Finish
Description: Graded texture (e.g., SPI-A1 for glossy, SPI-C3 for matte). Process Compatibility: EDM, polishing Materials: Tool steel, aluminum molds Key Use: Plastic injection molds for consumer products. Process Tolerance: Ra 0.05-1.6 μm, texture replication ≥90% Process Specifications: SPI-SPE-1 standard, EDM current 5-50 A

What is Sheet Metal Welding?How Does Sheet Metal Welding Work?

Sheet metal welding is a fabrication process that joins two or more metal sheets by melting their edges and fusing them, often with a filler material. It creates strong, permanent bonds critical for structural integrity in metal assemblies.
  • Common welding methods for sheet metal include:
  • TIG Welding (GTAW)：‌Uses a non-consumable tungsten electrode and inert gas (argon/helium) to produce precise, clean welds. Ideal for thin sheets (0.5–3 mm).
  • MIG Welding (GMAW)‌：Employs a continuous wire electrode and shielding gas for faster, high-deposition welding. Suitable for medium-thickness sheets (1–6 mm).
  • Resistance Spot Welding：‌Applies pressure and electric current to localized points, melting metal to form nugget joints. Widely used in automotive panels.
  • Laser Welding：‌Focuses a high-power laser beam for ultra-precise, low-distortion seams (common in electronics and medical devices).

Success Stories of Metal Welding Projects

FAQs

Which sheet metal welding is most difficult?‌

TIG welding represents the most technically demanding sheet metal joining method, requiring advanced operator skills and extensive training due 

to its precise parameter control needs. This complexity yields industry-leading weld integrity and longevity, justifying its adoption for critical applications.

Tungsten Inert Gas (TIG) welding delivers superior mechanical properties for sheet metal applications, with its high-temperature arc and controlled 

cooling cycle producing exceptional tensile strength and material ductility. Metal Inert Gas (MIG) welding also provides robust joints, making both

 processes ideal for structural applications.

The three fundamental sheet metal welding techniques are arc welding, gas welding, and resistance welding – each offering distinct technological 

advantages for specific applications. Selection criteria include base material compatibility, required joint strength, production specifications, and 

operator expertise.