E9015-G
Chemical Composition of Deposited Metal (Typical Values, %) Mechanical Properties of Deposited Metal (Typical Values) Key Performance Comparison (Electrode vs. Welding Wire) Influence of Welding Process on Properties
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Product Introduction
Chemical Composition of Deposited Metal (Typical Values, %)
| Element | C | Mn | Si | S | P | Ni | Cr | Mo | V | Cu |
|---|---|---|---|---|---|---|---|---|---|---|
| Range | ≤0.12 | 0.80-1.50 | ≤0.75 | ≤0.035 | ≤0.035 | 0.50-1.50 | ≤0.50 | 0.20-0.50 | ≤0.08 | ≤0.30 |
| Typical Value | 0.06-0.08 | 1.10-1.30 | 0.28-0.40 | ≤0.015 | ≤0.020 | 0.62-1.23 | 0.05-0.10 | 0.24-0.27 | ≤0.01 | ≤0.03 |
Mechanical Properties of Deposited Metal (Typical Values)
| Performance Indicator | Unit | Standard Requirement (AWS A5.5) | Typical Measured Value | Test Condition/Note |
|---|---|---|---|---|
| Tensile Strength | MPa | ≥620 | 620-680 | Room temperature, post-weld heat treatment at 620℃ for 1h |
| Yield Strength | MPa | ≥530 | 550-600 | Rp₀.₂ (0.2% proof strength), room temperature |
| Elongation (A₅) | % | ≥15 | 18-26 | Room temperature, 5× gauge length tension test |
| Impact Energy (-20℃) | J | ≥110 (Charpy V-notch) | 120-180 | 10mm×10mm specimen, transverse sampling |
Key Performance Comparison (Electrode vs. Welding Wire)
| Characteristic | AWS E9015-G (Electrode) | AWS ER90S-G (Welding Wire) |
|---|---|---|
| Process Type | Shielded Metal Arc Welding (SMAW), flux-coated | Gas Metal Arc Welding (MIG/MAG), requires CO₂/Ar mixed gas |
| Diffusible Hydrogen Content | ≤5 mL/100g (ultra-low hydrogen type) | ≤15 mL/100g (conventional) |
| Typical Tensile Strength | 620-680 MPa | 620-650 MPa |
| Applicable Scenarios | Critical structures such as pressure vessels, bridges, and penstocks of hydropower stations | Automated welding, general structural components |
| Operation Difficulty | Requires strict drying (400-430℃); skill required for all-position welding | Easy to operate, suitable for continuous welding of long welds |
Influence of Welding Process on Properties
| Process Parameter | Recommended Range | Influence on Properties |
|---|---|---|
| Current Polarity | Direct Current Electrode Negative (DCEN) | DC arc stability is better than AC, reducing hydrogen-induced cracking risk |
| Welding Current | φ3.2mm: 80-120A φ4.0mm: 130-180A |
Excessively high current leads to coarse grain size and decreased impact toughness |
| Interpass Temperature | ≤150℃ (recommended 90-130℃) | Overly high temperature may cause reheat cracking; overly low temperature may lead to cold cracking |
| Preheat Temperature | 50-150℃ (depending on base metal thickness) | Prevents cold cracking, especially for high-strength steels such as Q460 |
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