TOKO AWS A5.17 EM12K Submerged Arc Welding Wire
Submerged ARC welding process (SAW) is an automatic and high productivity fusion welding process. Compared to Stick welding (SMAW), granular flux is laid on the unwelded seam area. Ideal for heavy fabrication, shipbuilding, pressure vessels, structural steel (beams, bridges), and pipeline welding.
Key Specifications
- AWS Classification: Compliant with AWS A5.17 EM12K
- Chemical Composition: Medium-manganese, silicon-killed carbon steel wire
- Flux Compatibility: Pairs with neutral/active fluxes (F7A2-EM12K, F6A2-EM12K)
- Wire Diameters: 2.0mm to 6.4mm (common: 2.4mm, 3.2mm, 4.0mm)
- Current Types: AC or DC (typically DC+ for better penetration)
Welding Performance
- Deposition Efficiency: High deposition rates (8–12 kg/hr)
- Arc Stability: Smooth, consistent arc with minimal spatter
- Penetration Profile: Balanced penetration for multi-pass welds
- Weld Metal Cleanliness: Effective deoxidation minimizes porosity
Applications
- Heavy fabrication and structural steel
- Shipbuilding and offshore structures
- Pressure vessels and storage tanks
- Pipeline welding and bridge construction
Technical Specifications
Chemical Composition (%)
| C | Mn | Si | S | P |
|---|---|---|---|---|
| 0.10–0.15 | 1.25–1.75 | 0.30–0.60 | ≤0.030 | ≤0.030 |
Mechanical Properties (with matched flux)
| Tensile Strength | Yield Strength | Elongation | Impact Toughness (-30°C) |
|---|---|---|---|
| 415–550 MPa | ≥330 MPa | ≥22% | ≥27J |
Welding Parameters
| Current Range | Voltage | Travel Speed |
|---|---|---|
| 300–1,000A | 28–34V | 30–60 cm/min |
Comparison to Similar Wires
| Feature | EM12K | EM13K |
|---|---|---|
| Manganese Content | Medium (1.25–1.75%) | Higher (1.50–2.00%) |
| Impact Toughness | Good at -30°C | Better at -50°C |
| Typical Use | General fabrication, shipbuilding | Cryogenic applications, pipelines |
Advantages
- High Productivity: Automated welding with fast travel speeds
- Weld Quality: Excellent X-ray quality with low hydrogen levels
- Versatility: Works with multiple flux types
- Certifications: Meets ABS, DNV, and ASME standards
When to Choose EM12K
- ✅ Thick-section welding (≥10mm steel plates)
- ✅ High-volume production requiring automation
- ✅ Demanding environments (shipyards, structural fabrication)
- ✅ Cost-effective solution for carbon/HSLA steels
Storage & Handling
- Store wire in dry conditions to prevent rust
- Re-dry fluxes at 300–350°C for 1–2 hours if exposed to humidity
