Precautions ER70S-6

ER70S-6 welding wire is a low-carbon steel gas shielded welding wire that complies with AWS A5.18 standards and offers excellent welding processability and mechanical properties. Its unique chemical composition (C 0.06-0.15%, Mn 1.40-1.85%, Si 0.80-1.15%) ensures stability and weld quality during welding, making it widely used in various steel structure welding projects.

Excellent mechanical properties: Tensile strength ≥480 MPa, yield strength ≥400 MPa, elongation ≥22%, impact energy ≥27 J at -30°C, ensuring weld toughness and crack resistance.
Excellent welding processability: Stable arc, minimal spatter, and aesthetically pleasing weld finish. With a 1.2mm wire gauge and 180A current, spatter is reduced by approximately 30% compared to conventional wire, significantly improving the working environment.
Wide applicable current range: Recommended current for 0.8mm gauge is 50-100A, and for 1.2mm gauge is 80-350A, meeting the welding needs of workpieces of varying thicknesses.
Low-hydrogen properties: In line with the industry trend of increasing adoption of low-hydrogen welding wire in heavy machinery by 2025, this reduces the risk of hydrogen-induced cracking in welded joints.

Chemical Storage Tank Welding Project: In a large chemical storage tank welding project, ER70S-6 welding wire was used for both vertical and horizontal welding operations, achieving a first-pass pass rate of over 98%, meeting the strength requirements in a corrosive environment.
Bridge Steel Structure Welding: In the welding of the steel structure of a sea-crossing bridge, 1.2mm ER70S-6 welding wire was used, combined with an 80% Ar + 20% CO₂ mixed gas shielding, increasing welding efficiency by 25% and achieving excellent low-temperature impact resistance.
Pressure Pipeline Welding: In a long-distance oil pipeline welding project, optimizing the ER70S-6 wire's dry stickout length (15-20mm) and gas flow rate (18-25L/min) effectively controlled porosity defects, ensuring weld quality met API 5L standards.

Dry-out Length Control: The recommended dry-out length is 10-15 times the wire diameter. For example, for 1.2mm wire, keep it between 12-18mm. A length too short can cause increased spatter, while a length too long can lead to arc instability.
Gas Flow Adjustment: The recommended flow rate for pure CO₂ gas is 15-25 L/min, and for Ar+CO₂ mixed gas, 20-30 L/min. Wind protection measures should be implemented when wind speeds exceed 2 m/s.
Current and Voltage Matching: For 0.8mm wire, the recommended voltage is 18-20V at 80A, and for 1.2mm wire, the recommended voltage is 24-26V at 200A to ensure stable arc combustion.
Groove Cleaning: Before welding, remove oil, rust, and moisture within 20mm on both sides of the groove to avoid the formation of pores and inclusions.

Welding wire storage: Store in a dry, ventilated area to prevent moisture. Unopened, unused wire must be sealed to prevent moisture absorption that could affect welding quality.
Nozzle cleaning: Regularly clean spatter from the nozzle during welding to keep the contact tip clear and prevent arc blow.
Common Problem Solutions:

• Porosity: Check for adequate gas flow, clean grooves, and proper wire extension.
• Excessive spatter: Reduce current or increase voltage appropriately, and check contact tip wear.
• Poor weld formation: Adjust welding speed and oscillation amplitude to ensure sufficient fusion of the weld pool.

Hot Tags: precautions er70s-6, China, manufacturers, suppliers, factory, company, wholesale, discount, buy, low price, high quality, products