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To fulfill the customers’ over-expected pleasure , we’ve got our strong group to supply our greatest general provider which incorporates promoting, gross sales, planning, production, quality controlling, packing, warehousing and logistics for Tungsten Welding Electrode, Tungsten Welding Rods, Welding Rod Grey Tig Tungsten Electrode, Our aim is to help customers to make more profits and realize their goals. Through a lot of hard work, we establish a long-term business relationship with so many customers all around the world, and achieve win-win success. We will continue to do our best effort to service and satisfy you! Sincerely welcome you to join us!
Chemical composition:
| Main and minor components | Min.content(%) | ASTM B760 |
| W | 99.95 | balance |
| Impurities | Max.values (μg/g) | Max.values (μg/g) |
| Al | 15 | - |
| Cu | 10 | - |
| Cr | 20 | - |
| Fe | 30 | 100 |
| K | 10 | - |
| Ni | 20 | 100 |
| Si | 20 | 100 |
| Mo | 100 | - |
| C | 30 | 100 |
| H | 5 | - |
| N | 5 | 100 |
| O | 20 | 100 |
| Cd | 5 | - |
| Hg | 1 | - |
| Pb | 5 | - |
Diameter and tolerances:
| Diameter (mm) | Tolerance | |||
| Straightened | Forged | Turned | Ground | |
| 0.50-0.99 | - | - | ±0.007 | |
| 1.00-1.99 | - | - | ±0.010 | |
| 2.00-2.99 | ±2.0 % | - | ±0.015 | |
| 3.00-15.9 | - | - | ±0.020 | |
| 16.0-24.9 | - | ±0.30 | ±0.030 | |
| 25.0-34.9 | - | ±0.40 | ±0.050 | |
| 35.0-39.9 | - | ±0.40 | ±0.30 | ±0.060 |
| 40.0-49.9 | - | ±0.40 | ±0.30 | ±0.20 |
| 50.0-90.0 | - | ±1.00 | ±0.40 | - |
Length and straightness:
| Diameter (mm) | Production length (mm) | Stiraightness/Meter (mm) | |
| Cleaned | Ground/turned | ||
| 0.50-10.0 | ≥500 | ＜2.5 | ＜2.5 |
| 10.1-50.0 | ≥300 | ＜2.0 | ＜1.5 |
| 50.1-90.0 | ≥100 | ＜2.0 | ＜1.5 |
Length tolerance:
| Diameter 0.50-30.0 mm | ||||||
| Nominal length (mm) | ≥15 | 15-120 | 120-400 | 400-1000 | 1000-2000 | ＞2000 |
| Length tolerance(mm) | ±0.2 | ±0.3 | ±0.5 | ±2.0 | ±3.0 | ±4.0 |
| Diameter ＞30.0 mm | ||||||
| Nominal length (mm) | ≥30 | 30-120 | 120-400 | 400-1000 | 1000-2000 | ＞2000 |
| Length tolerance(mm) | ±0.5 | ±0.8 | ±1.2 | ±4.0 | ±6.0 | ±8.0 |
Density: ≥19.1g/cm³
Nondestructive testing: For diameters＞15.00 mm:100% ultrasonic testing. For diameters of 0.50-50.0mm:Eddy curent tests on rods with ground surface.
| Diameter(mm) | Hardness (HV 10) |
| 0.50-2.99 | — |
| 3.00-9.99 | 420-500 |
| 10.0-29.9 | 420-480 |
| 30.0-49.9 | 380-460 |
| ≥50 | ＞350 |
Surface condition:
| Diameter (mm) | Surface condition |
| 0.50-90.0 | Chemical cleaned |
| ≥40.0 | Turned Ra ≤3.2μm |
| 0.50-30 | Centerless ground Ra≤1.0μm |
| ≥40.0 | - Centerless ground Ra≤1.2μm |