ER307Si MIG Welding Wire

 

 

Key Features:

• Excellent Crack Resistance: This is the core advantage of the 307 series welding consumables, specifically designed to address welding cracking issues.
• Good Welding Operability: Due to the addition of silicon, ER307Si exhibits a highly stable arc, excellent weld pool fluidity, and a smooth, even weld, making it ideal for automated and semi-automatic welding (such as MIG welding).
• Austenitic Structure: The weld metal has an austenitic structure, possessing good toughness and plasticity.

Main Applications:

Welding of 307 and 308 Stainless Steel: Used for the manufacture and repair of equipment made of the same material.

Welding of Forged Stainless Steel: For example, forgings such as F307 and F308 in ASTM A182 standards.

Welding of Dissimilar Steels: This is one of its most important applications.

Examples include:

• Welding stainless steel with carbon steel and low-alloy steel.
• Welding of composite joints between high-carbon steel or quenched and tempered steel and stainless steel.
• Welding Overlay and Lining: Overlaying a corrosion-resistant or crack-resistant layer of stainless steel onto the surface of carbon steel equipment.

 

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C	Mn	Si	Cr	Ni	P	S	Mo	Cu
0.04–0.14	6.5– 8.0	0.65 – 1.00	18.5– 22	8– 10.75	≤0.03	≤0.03	≤0.75	≤0.75

 

 

Mechanical properties	Yield strength MPa	Tensile strength MPa	Elongation %
AWS Standard	≥285 MPa	≥953 MPa	13%

 

ER307Si stainless steel welding wire, also known as H09Cr21Ni9Mn4Mo, is an austenitic stainless steel MIG and TIG welding wire.

It uses DC reverse polarity, exhibiting excellent welding process, producing fine and bright weld beads with minimal spatter.

The weld metal possesses good ductility, toughness, and crack resistance; its high manganese content results in low crack sensitivity.

It is suitable for welding difficult-to-weld steels such as non-magnetic steel, high-manganese steel, and hardening wear-resistant steel.

It is suitable for all-position welding.

 

 

1. Heat treatment temperature: 1227°C-1312°C
2. Use 100% argon or Ar+(1%~3%)O2 as the shielding gas, and the shielding gas flow rate should be 20-25L/min.
3. Strictly remove rust, moisture, oil, dust and other impurities at the welding point during welding.

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