TOKO AWS A5.4 E312-16 Welding Electrode
TOKO AWS A5.4 E312-16 is an austenitic stainless steel welding electrode. The "E312" indicates a high-alloy composition with approximately 29-30% chromium, 9-10% nickel, and small amounts of molybdenum, providing excellent corrosion resistance, high strength, and crack resistance. The "-16" suffix denotes a lime-titania coating, suitable for AC or DC+ polarity and all-position welding.
Key Advantages
- High Crack Resistance: Ideal for contaminated or high-sulfur base metals.
- Dissimilar Metal Welding: Effective for joining austenitic stainless steels to carbon steels or low-alloy steels.
- Ductility & Strength: Austenitic-ferritic microstructure resists thermal cracking.
- Corrosion & Heat Resistance: Suitable for high-temperature applications.
- All-Position Welding: Excellent performance in flat, horizontal, vertical, and overhead positions.
Classification & Specification
- AWS Classification: Compliant with AWS A5.4 E312-16 standards.
- Coating Type: Lime-titania coating for AC or DC+ polarity.
- High-Alloy Composition: 29-30% chromium, 9-10% nickel with molybdenum.
Common Applications
- Dissimilar metal joining (stainless steel to carbon steel)
- Chemical processing equipment
- Power generation applications
- Maintenance and field repairs
- High-temperature environments (exhaust systems, boilers)
- Heavy industry (mining, construction, machinery)
- Cladding/overlay for corrosion-resistant surfaces
Technical Specifications
Chemical Composition
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 29-30% |
| Nickel (Ni) | 9-10% |
| Molybdenum (Mo) | Small amounts |
| Carbon (C) | Low content for enhanced properties |
Welding Parameters
| Parameter | Specification |
|---|---|
| Current Type | AC or DC+ (reverse polarity) |
| Welding Positions | All-position (flat, horizontal, vertical, overhead) |
| Preheating | Minimal required; avoid excessive heat input |
Performance Characteristics
- Arc Stability: Excellent arc characteristics with smooth operation.
- Slag Removal: Easy slag detachment for efficient welding.
- Crack Resistance: Superior resistance to thermal and stress cracking.
- Versatility: Suitable for a wide range of base metals and conditions.
Storage & Handling
- Storage: Keep in dry conditions to prevent moisture absorption.
- Rebaking: Required if electrodes are exposed to humidity.
- Heat Treatment: Generally not required for thin sections.
Technical Documentation
✅ TOKO AWS A5.4 E312-16 welding electrode is a versatile, all-position stainless steel electrode featuring a lime-titania flux coating. Designed for AC/DC welding, it offers exceptional arc stability, easy slag removal, and strong crack resistance, making it ideal for challenging applications.