Welding wire MTC MT-4820 1.4820

Welding Wire MTC MT-4820 1.4820

**MT‑4820 – MIG wire electrode made of ferritic-austenitic chromium-nickel steel**  
*Heat resistant up to +1100 °C, scale and sulfur resistant – ideal for welding high-temperature resistant steels*  

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### Product Overview  
The MIG wire MT‑4820 is specially designed for MAG welding (MIG) of ferritic-austenitic, heat-resistant steels. It combines high mechanical strength with outstanding resistance to scale, oxidation, and sulfur-containing furnace gases – even at temperatures up to +1100 °C.  

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## Technical Specifications (Approximate Values)

| **Parameter** | **Value** | **Unit** |
|---------------|----------|------------|
| 0.2% Yield Strength (Rp0.2) | 450 | MPa |
| Tensile Strength (Rm) | 650 | MPa |
| Elongation at Break (A5) | 15 | % |
| Impact Strength (AV) | 50 | J |
| Shielding Gas (MIG) | **M 11** | – |
| Microstructure | Ferrite-Austenite | – |
| Chemical Composition (in %) | C 0.10 % · Si 0.6 % · Mn 1.0-2.5 % · Cr 24-27 % · Ni 4-6 % | – |

**Standard:** EN ISO 14343‑A (G/W 25 4) – Material Number 1.4820  

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## Areas of Application & Welding Positions  

| **Process** | **Permissible Positions (according to DIN EN ISO 6947)** |
|---------------|-----------------------------------------------|
| MIG (MAG) | **PA, PB, PF** (Flat, Vertical and Overhead Welding Position) |

*Recommended Practice*  
- **Joint Welds** on similar, heat-resistant steels: MT‑4820 provides a stable root pass.  
- **Cover Passes**: Due to the chemical resistance of the wire, the notch toughness and deformability of the top layer are maximized.  

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## Advantages at a Glance  

- **Heat resistance up to +1100 °C** – no degradation of welding properties at high operating temperatures.  
- **Scale and oxidation protection** – reduces post-processing and increases weld life.  
- **Resistance to sulfur-containing furnace gases** – ideal for welding in aggressive environments.  
- **High mechanical quality** (Rm 650 MPa, AV 50 J) – guarantees durable and long-lasting connections.  
- **Usable in all common MIG positions (PA, PB, PF)** – flexible application in manufacturing and service.  

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## Packaging & Size Information  

| Diameter | Spool | Package Content |
|-------------|-------|------------|
| **1.00 mm** | K300 | 15.0 kg |
| **1.20 mm** | K300 | 15.0 kg |

Each package is hermetically sealed to prevent contamination and ensure the quality of the weld material.  

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## Special Notes  

- The wire is heat and scale resistant **up to +1100 °C** and resistant to reducing, sulfur-containing furnace gases.  
- For **cover passes**, MT‑4820 is recommended because its chemical resistance increases notch toughness and reduces post-processing effort.  
- For **joint welds**, austenitic additives (e.g., MT‑309, MT‑310) can be used to further optimize welding properties.