| Scenario Type | Specific Scenario | Basis for Chemical Performance |
|---|---|---|
| Applicable Scenarios | 1. Non-critical low-carbon steel structures (e.g., civil construction steel frames, light industrial equipment casings); 2. Thin-plate splicing (thickness ≤16mm), decorative components; 3. All-position welding (e.g., pipeline maintenance, vertical/overhead welding of small steel structures). |
1. The weld is a low-carbon steel structure, matching base metals such as Q235/A3; 2. Moderate crack resistance and low heat input for thin plates, with no cracking risk; 3. The effect of arc stabilizers ensures stable arcs, suitable for all-position operations. |
| Inapplicable Scenarios | 1. Welding of special steels such as low-alloy high-strength steel and stainless steel; 2. Chemical equipment, marine engineering, and acid-base pipelines (corrosive environments); 3. Critical structures such as thick plates (≥20mm), low-temperature (≤0℃) applications, and high-pressure vessels. |
1. No alloying elements, unable to match the strength/corrosion resistance requirements of special steels; 2. No corrosion-resistant elements like Cr or Ni, making it vulnerable to damage by corrosive media; 3. Moderate cold cracking resistance, and thick plates have high restraint, easily leading to cold cracking. |
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