Web Menu

Product Search

Language

Share

OEM/ODM ER4043 Silicon Aluminum Welding Wire Suppliers

Home / Products / Aluminum Welding Wire / ER4043 Silicon Aluminum Welding Wire
ER4043 Silicon Aluminum Welding Wire
  • ER4043 Silicon Aluminum Welding Wire
  • ER4043 Silicon Aluminum Welding Wire
  • ER4043 Silicon Aluminum Welding Wire
  • ER4043 Silicon Aluminum Welding Wire
Aluminum Welding Wire

ER4043 Silicon Aluminum Welding Wire

4043 is a 5% Silicon Aluminum filler metal which has excellent flowability and penetration characteristics, recommended for welding Aluminum alloys with maximun 2% alloys element and for Aluminum alloys containing up to 7% of Si, such as 2014,3003,3004, 5052, 6060,6061,6063 and 6082. Mainly used in chemicals, molds, furniture, storage boxes, containers and other industries.

E-mail: rich@chinayinyu.com
Contact Us

ER4043 Silicon Aluminum Welding Wire - Precision Alloy for Aluminum Fabrication

Product Features

  • Composition Stability: Contains approximately 5% silicon, ensuring consistent melting characteristics and reduced cracking in aluminum welds.
  • Corrosion Resistance: Offers enhanced resistance to oxidation and environmental corrosion in welded aluminum structures.
  • Weldability: Optimized for MIG and TIG welding processes, providing stable arc performance and smooth bead appearance.

Product Description

The ER4043 Silicon Aluminum Welding Wire is engineered for joining aluminum alloys where moderate strength and excellent corrosion resistance are required. Its formulation ensures predictable melting behavior, minimizing defects such as porosity and hot cracking in structural and fabrication applications.

Manufactured according to ASTM B 231 standards, this welding wire undergoes stringent quality control, ensuring uniform chemical composition and mechanical consistency. It is suitable for applications in automotive, aerospace, and industrial fabrication sectors, where controlled welding performance and alloy integrity are essential.

Technical Specifications

Property Specification
Alloy Type ER4043
Silicon Content 4.5-5.5%
Aluminum Balance Remainder
Diameter 1.2 mm / 1.6 mm / 2.0 mm
Welding Process MIG / TIG
Standard ASTM B 231

Application Areas

This product is suitable for the following industrial scenarios:

  • Automotive body panels and structural welding
  • Aerospace aluminum component fabrication
  • Construction and architectural aluminum structures
  • Marine and environmental corrosion-resistant aluminum projects

FAQ

What aluminum alloys are compatible with ER4043 welding wire?

ER4043 welding wire is compatible with 5xxx and 6xxx series aluminum alloys. It is especially recommended for aluminum components that require moderate strength with enhanced corrosion resistance.

Can ER4043 be used for both MIG and TIG welding processes?

Yes, ER4043 is formulated to provide stable arc performance in both MIG (GMAW) and TIG (GTAW) welding applications, delivering smooth bead appearance and minimal defects.

How does silicon content affect weld quality?

The silicon content of approximately 5% reduces the risk of hot cracking, improves fluidity during welding, and contributes to better dimensional stability of the welded aluminum structure.

  • DIN EN ISO 18273

    S AL 4043 (AlSi 5 (A) )

    Werkstoff-Nr.

    3.2245

    AWS/ASME A 5.10

    ER 4043

    CHEMICAL COMPOSITION（wt）/%

    Si

    Fe

    Cu

    Mn

    Mg

    Cr

    Zn

    Ti

    Zr

    Be

    other

    Al

    single

    total

    4.5~6.0

    0.8

    0.3

    0.05

    0.05

    —

    0.1

    0.2

    —

    0.0003

    0.05

    0.15

    Rem.

    TYPICAL CHARACTERISTICS

    melting range

    1065 - 1170°F

    conductivity

    42%IACS（O）

    density

    2.68g/mm3

    corrosion resistance

    B(Gen) A(SCC)

    coefficient of thermal expansion（20℃~300℃）

    22×10-6/K

    heat conductivity（20℃）

    170W/m·K

    Authentication

    ■ DB（61.069.04）

    ■ CE

    The mechanical properties of typical welded joint

    Starting Sheet

    Starting Sheet Performance

    Joint Performance

    Rm (MPa)

    RP0.2 (MPa)

    >A/%

    Rm (MPa)

    RP0.2 (MPa)

    A/%

    2014-T6

    480

    410

    13

    230

    190

    4

    6061-T4

    240

    140

    22

    185

    120

    8

    6061-T6

    300

    270

    12

    185

    120

    8

    6063-T4

    25

    22

    22

    20

    10

    12

    6082-T6

    300

    250

    6

    190

    160

    4

    Size and Packet 

    Class

    Typical Diameter/mm

    Reference Packet/Kg

    MIG

    0.8、0.9、1.0、1.2、1.6、2.4

    0.5、2、5、6、7、9

    TIG

    1.6、2.0、2.4、3.0、3.2、4.0、5.0/1000

    5、10

    DRUM

    0.8、0.9、1.0、1.2、1.6

    40、80

    COIL

    2.4、3.0、3.2、4.0

    8-15

PREV：ER4047 Aluminum Mig Welding Wire
NEXT：No next product

ER4043 Silicon Aluminum Welding Wire

Coming From China，
Marketing To The World.

Hangzhou Kunli welding materials Co., Ltd. is located in the industrial zone of Puyang Town, Xiaoshan District, Hangzhou, Zhejiang Province. It is a high-technology and high-performance China Aluminum Welding Wire Manufacturers and wholesale aluminum welding wire ER4043 suppliers. The company has more than 20 years of aluminum alloy wire production experience, with international advanced aluminum alloy welding wire manufacturing equipment, complete testing equipment,stable production process and strict quality control system. The high-performance OEM/ODM ER4043 Silicon Aluminum Welding Wire produced by the company has successfully passed a number of international authoritative certification, such as DB, CE, ABS, DNV, CCS, etc.,. We have more than 200MT production capacity per month and 50% was exported to over 30 countries such as USA,Mexico,Southeast Asia, Japan,Korea,Australia,New zealand and etc.

  • 30+

    USED IN HEAVY INDUSTRY TECHNOLOGY SECTOR

  • 35

    YEARS OF RESEARCH AND DEVELOPMENT EXPERIENCE

  • 200+

    COOPERATIVE LARGE-SCALE R & D INSTITUTIONS

  • 20+

    GLOBAL TRADE COUNTRIES AND REGIONS

Coming From China,
Marketing To The World.

More than 90% of our field operators have professional and technical education background, and have many years of experience in equipment processing and assembly. It is precisely because of this united, dedicated, pioneering, skilled and experienced team that the company's technology and products can be continuously updated and improved.

Honor

GET IN TOUCH

Send Us a Message?

Related Products

::: Last News :::

Industry Information Extension

More Information About ER4043 Silicon Aluminum Welding Wire Factory

Practice of ER4043 welding wire in repairing casting defects: from theory to field operation guide

I. Theoretical basis of ER4043 welding wire repairing casting defects

Applicability analysis
Material matching: compatibility of ER4043 (containing 5% silicon) with common cast aluminum alloys (such as A356, ADC12), reducing the risk of thermal cracks.

Flowability advantage: Silicon element improves the fluidity of the molten pool and is suitable for filling irregular defects such as pores and shrinkage holes in castings.

Core challenges of repair
Risk of welding pores caused by the porosity of castings;
Softening problems in the heat-affected zone (HAZ);
Deformation or secondary cracking caused by residual stress.

II. Key steps and technical points of field operation

1. Defect pretreatment
Cleaning: Use acetone or special solvent to remove oil stains and mechanically grind the oxide layer (avoid chemical cleaning residues).
Defect grooving: Bevel the pores/cracks (V-groove is recommended, angle 60°-70°) to expose fresh metal.

2. Welding parameter optimization

Parameter Recommended Range Notes
Shielding Gas Pure Ar (99.99%) Flow rate: 15-20 L/min
Current Type AC TIG or Pulsed MIG AC removes oxide layer, pulsed mode reduces heat input
Preheat Temperature 150-250°C (for large castings) Prevents rapid cooling cracks
Interpass Temperature ≤100°C Avoids overheating and softening

3. Welding skills
Hole filling strategy: segmented jump welding (2-3cm interval) to reduce local heat accumulation.
Arc closure treatment: current attenuation function to avoid arc crater cracks, add filler metal to fill if necessary.

III. Typical casting defect repair cases

Case 1: Engine cylinder block air hole repair
Problem: A356 cylinder block pouring air hole (diameter 3-5mm).
Solution: TIG welding + ER4043, preheating 200℃, low current (90-110A) layered cladding.
Result: X-ray detection shows no unfused, and the surface meets the standard after machining.

Case 2: Die casting mold crack repair
Challenge: ADC12 mold thermal fatigue crack (depth > 2mm).
Key points: Drilling crack stop holes at the end of the crack, MIG pulse welding (wire feeding speed 5m/min).

Ⅳ. Post-weld treatment and quality verification

Stress relief:
Vibration aging or 250℃×2h annealing (select according to the purpose of the casting).

Detection method:
Visual/penetrant inspection: surface cracks;
X-ray/ultrasonic: internal defects;
Hardness test: The difference between HAZ and base material is ≤15HB for qualified.

Ⅴ. Common problems and solutions

Problem 1: Many pores in the weld
Check gas purity, workpiece humidity, and increase preheating temperature.

Problem 2: Poor post-weld processing
Control silicon segregation to avoid excessive heat input leading to coarse grains.