Solid Wire
ER90S-G Welding Wire
ER90S-G is a copper-coated low alloy high-strength solid wire for GMAW (MIG/MAG) and GTAW (TIG). It is designed for welding high-strength low-alloy structura...
ER90S-G
ER90S-G is a copper-coated low alloy high-strength solid wire for GMAW (MIG/MAG) and GTAW (TIG). It is designed for welding high-strength low-alloy structural steels, providing excellent mechanical strength, stable weld performance and good crack resistance for medium-high strength structural applications.
Features
• Tailored low-alloy formulation delivers high tensile and yield strength, meeting the mechanical requirements of high-strength structural steel welding.
• Good weld crack resistance and structural stability, suitable for high-rigidity and high-load welding components.
• Stable arc, low spatter and clean weld bead appearance, ensuring easy operation and efficient on-site construction.
• Reliable chemical stability and process adaptability for general high-strength engineering welding scenarios.
Diameter & Packaging
MIG：0.8 / 1.0 / 1.2 / 1.6 mm 5KG Spool / 15KG Spool
TIG：2.0 / 2.4 / 3.2 mm 5kg plastic tube
Welding Parameters
Polarity: DC+ (DCRP)
Shielding Gas
MIG/MAG: 100% CO₂ or Ar + 5%~20% CO₂, Flow rate: 15–20 L/min
TIG: Pure Argon (99.99%)
Preheat & Interpass Temperature
100~150 ℃ for thick plates or high-restraint joints to prevent hydrogen-induced cold cracking.
Typical Φ1.2 mm MAG parameters: Current 150~210 A; Voltage 21~25 V
Deposited Metal Mechanical Properties
Tensile Strength: ≥620 MPa (90 ksi)
Yield Strength: ≥520 MPa
Elongation: ≥15 %
Charpy V-notch: ≥27 J (Room temperature)
Applications
Suitable for welding various high-strength low-alloy structural steels. Widely used in heavy machinery manufacturing, high-strength steel structures, engineering machinery frames, general pressure equipment and load-bearing structural components.
Welding Precautions
• General-purpose high-strength low-alloy welding wire; not applicable for heat-resistant steel, cryogenic steel or stainless steel welding.
• Remove all oil, rust, scale and moisture from the groove and surrounding base metal to avoid porosity and slag inclusions.
• Maintain standard preheat and interpass temperature to reduce welding residual stress and prevent cold cracks.
• Apply appropriate post-weld heat treatment for thick-wall and heavy-load components to optimize structural performance.
• Not recommended for long-term high-temperature or ultra-low temperature service working conditions.