TOKO E71T-5C Basic Type Flux-Cored Welding Wire
AWS A5.20 E71T-5C · Basic Slag System · Low Hydrogen · All-Position with CO₂
The E71T-5C is a basic (low-hydrogen) flux-cored wire designed for single- and multi-pass welding of carbon and mild steels where superior mechanical properties and low-temperature service are specified. Its unique flux formulation ensures extremely low diffusible hydrogen (<4 ml/100g), making it ideal for restraint joints and high-strength applications.
E71T-5C 12.5kg spool · Vacuum-sealed for low hydrogen
Critical Advantages
- Low Hydrogen Design: Diffusible hydrogen ≤4 ml/100g – minimizes cold cracking risk.
- Exceptional Low-Temperature Toughness: Guaranteed ≥27J at -40°C (typical >50J).
- CO₂ Gas Shielded: Optimized for 100% CO₂, providing deep penetration and high deposition.
- All-Position Versatility: Excellent operability in vertical-up and overhead positions.
- Basic Slag System: Produces clean welds with good slag detachability and mechanical properties.
- Moisture-Resistant Packaging: Hermetically sealed aluminum foil bags to preserve low hydrogen characteristics.
- Available Diameters: 0.9mm, 1.2mm, 1.6mm for precise application matching.
Performance That Matters in Demanding Environments
Primary Applications & Industries
- Offshore platforms and subsea structures
- Bridge construction and seismic retrofitting
- Arctic pipeline and low-temperature facilities
- Shipbuilding (high-strength hulls, critical joints)
- Heavy equipment and crane manufacturing
- Pressure vessel and storage tank fabrication
- Wind turbine towers and renewable energy structures
- Structural steel for stadiums and high-rises
- Mining and earthmoving equipment repair
Technical Specifications
Chemical Composition (Typical, Weld Metal)
| Element | Value (%) | Note |
|---|---|---|
| Carbon (C) | 0.04 – 0.09 | Controlled for toughness |
| Manganese (Mn) | 1.10 – 1.60 | Strength & deoxidation |
| Silicon (Si) | 0.20 – 0.60 | Deoxidizer |
| Sulfur (S) / Phosphorus (P) | ≤ 0.015 / ≤ 0.020 | Low impurities |
| Aluminum (Al) | 0.8 – 1.5 | Strong deoxidizer |
| Nickel (Ni) / Chromium (Cr) | ≤ 0.50 / ≤ 0.20 | Enhanced toughness |
Mechanical Properties (As-Welded, 100% CO₂)
| Property | Value (MPa) | Elongation | Impact |
|---|---|---|---|
| Yield Strength (Rp0.2) | ≥ 420 (typical 460) | ≥ 24% | ≥27J @ -40°C ≥47J @ -30°C |
| Tensile Strength (Rm) | 500 – 640 |
Welding Parameters (1.2mm / 0.045") – CO₂ 18-22 L/min
| Position | Current (A) | Voltage (V) | Stick-out (mm) |
|---|---|---|---|
| Flat / Horizontal | 200-280 | 26-30 | 18-22 |
| Vertical Up | 160-210 | 23-26 | 15-20 |
| Overhead | 150-190 | 22-25 | 12-18 |
* Other diameters (0.9mm, 1.6mm) available – consult technical datasheet.
Packaging Options
| Diameter (mm) | Spool Type | Weight | Part Number |
|---|---|---|---|
| 0.9 | Plastic Spool | 5 kg / 10 kg | E71T5C-09 |
| 1.2 | Metal / Plastic | 12.5 kg / 15 kg | E71T5C-12 |
| 1.6 | Metal Spool | 15 kg / 20 kg | E71T5C-16 |
Technical Documentation & Certifications
Download batch-specific material test certificates (MTC), welding procedure guidelines, and safety data sheets.