1. Deposited Metal Chemical Composition (Mass Fraction)
| Element | Content (%) | Function Description |
|---|---|---|
| C (Carbon) | ≤0.12 | Low carbon content reduces the hardening tendency of welds and lowers the risk of cold cracks |
| Mn (Manganese) | ≤1.60 | Improves the strength and toughness of welds and optimizes welding process performance |
| Si (Silicon) | ≤0.75 | Plays a deoxidizing role and reduces oxide inclusions in welds |
| S (Sulfur) | ≤0.035 | Strictly restricts harmful elements to avoid hot brittleness of welds |
| P (Phosphorus) | ≤0.040 | Controls low-temperature brittleness and ensures the low-temperature mechanical properties of welds |
2. Recommended Welding Parameters
| Electrode Diameter (mm) | Applicable Current Range (A) | Suitable Scenarios |
|---|---|---|
| 2.5 | 60~90 | Welding of thin steel plates and small-diameter pipes |
| 3.2 | 90~130 | Flat/vertical welding of medium-thin workpieces and welding of conventional structures |
| 4.0 | 150~190 | Welding of thick-walled components and groove welding |
| 5.0 | 180~230 | Welding of heavy steel structures and multi-layer multi-pass welding of thick plates |
| Note: When using AC power, the arc stability is slightly inferior to that of DC power. It is recommended to adjust the current appropriately or select the DC reverse polarity mode. |
3. Product Features
Coating Design: Adopts low hydrogen potassium coating, which effectively reduces hydrogen absorption during welding, significantly improves the crack resistance of welds, and meets the requirements of harsh working conditions;
Strong Versatility: Compatible with both alternating current (AC) and direct current (DC) power sources, meeting different equipment configurations; meanwhile, it is suitable for all-position welding such as flat welding, vertical welding, horizontal welding, and overhead welding, with a wide range of application scenarios;
Mechanical Properties: The weld metal has high strength and good toughness, can withstand a certain impact load and stress, and meets the welding requirements of important structures.
4. Application Scope
Applicable Materials: Medium carbon steel, low alloy steel (e.g., 16Mn, 09Mn2Si);
Core Scenarios:
Shipbuilding: Suitable for welding of shipbuilding grade A, B, D, E steels, ensuring structural reliability in marine environments;
Heavy Machinery: Welding of low alloy steel structures such as engineering machinery and pressure vessels;
Infrastructure Engineering: Welding of important load-bearing components such as bridges and large steel structure workshops.
5. Operation Precautions
Electrode Baking: Bake the electrodes at 350℃ for 1 hour before welding. After baking, store them in an insulation barrel at 80~120℃ for immediate use to avoid moisture absorption (moistened electrodes need to be re-baked, and re-baking should not exceed 2 times);
Welding Specifications: Short-arc welding is recommended to reduce gas intrusion; adopt narrow weld welding method to reduce welding deformation and stress concentration;
Base Metal Cleaning: Before welding, thoroughly remove impurities such as rust, oil, and moisture from the welding area of the base metal until the metallic luster is exposed;
Environmental Requirements: Avoid welding in environments with humidity >80% and wind speed >2m/s; when welding at low temperatures (<0℃), preheat the base metal to 100~200℃.
6. Purchase and Cooperation
Supply Capacity: Professional manufacturer in China, providing wholesale and customization services;
Quality Assurance: Products comply with industry standards and have passed authoritative tests such as SGS, ensuring high cost-effectiveness and stable quality;
Cooperation Support: Discounts are available, supporting bulk purchasing and undertaking customized orders for enterprises;
Contact Information: Official website (www.hzdayang.com), welcome to inquire and purchase.
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