Product description

Application: CO-REL® HJ431 flux is designed for submerged arc welding with H08A, H08MnA, H10Mn2, and H10MnSi wires, suitable for carbon steels and low-alloy steels (e.g., 16Mn, 15MnV). Widely applied in shipbuilding, boilers, low-pressure vessels, and structural steel fabrication. Also compatible with electroslag welding and copper welding.

Characteristics: HJ431-GX is a fused high-Mn high-Si low-F flux, appearing as reddish-brown to pale yellow glassy particles. 

- 16~40 mesh

MnO content plays a critical role in welding performance and mechanical properties. Sourced from high-grade manganese ores, this flux faces rising costs due to increasingly scarce domestic manganese resources. Nevertheless, the high-Mn system delivers superior process adaptability (e.g., arc stability, rust tolerance, and gas pore resistance), making HJ431-GX widely applicable for diverse steels. Compatible with both AC/DC power sources, it ensures optimal performance under DC+ polarity (wire connected to positive terminal).

Mechanical Performance of Deposit Metal (H08A/SU08A)

Tensile Strength MPa (N/mm²): 436

Yield Strength (MPa): 337

Elongation A (%): 29

Impact Energy (J): -20℃≥36

Chemical Composition (%)

Precautions:

1. Weld surfaces must be cleaned of oil, moisture, rust, and other contaminants prior to welding.

2. Storage conditions require strict moisture-proof measures.

3. Flux must be baked at 300–400°C for 2 hours before welding.