Our advancement depends on the superior gear ,superb talents and consistently strengthened technology forces for China Factory for Polished 1/8 Oz Tungsten Round Bar Weight For Derby, We look ahead to receiving your enquires quickly and hope to have the chance to get the job done together with you inside the future. Welcome to get a seem at our organization.
Our advancement depends on the superior gear ,superb talents and consistently strengthened technology forces for Bulk Tungsten Rod Chep For Industry, Density Tungsten Bar In Stock Size Custom, Tungsten Bucking Bar And Tungsten Rod Per Kg, “Good quality and reasonable price” are our business principles. If you are interested in our solutions or have any questions, remember to feel free to contact us. We hope to establish cooperative relationships with you in the near future.
Chemical composition:
| Main and minor components | Min.content(%) | ASTM B760 |
| W | balance | balance |
| La | 0.77-0.94% | |
| La2O3 | 0.90-1.10% | |
| 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 |
| Cd | 5 | - |
| Hg | 1 | - |
| Pb | 5 | - |
Diameter and tolerances:
| Diameter (mm) | Tolerance | ||
| Forged | Turned | Ground | |
| 1.20-1.99 | - | ±0.010 | |
| 2.00-2.99 | - | ±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 |
| 40.0-50.0 | ±0.40 | ±0.30 | ±0.20 |
| 50.0-80.0 | ±1.00 | ±0.40 | - |
Length and straightness:
| Diameter (mm) | Production length (mm) | Stiraightness/Meter (mm) | |
| Cleaned | Ground/turned | ||
| 1.20-10.0 | ≥500 | ＜2.5 | ＜2.5 |
| 10.1-50.0 | ≥300 | ＜2.0 | ＜1.5 |
| 50.1-80.0 | ≥100 | ＜2.0 | ＜1.5 |
Length tolerance:
|
Diameter 1.20-30.0 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:
| Diameter (mm) | Density (g/cm³) |
| 1.20-6.0 | 18.85 |
| 6.0-40.0 | 18.75 |
| 40.0-80.0 | 18.65 |
Nondestructive testing: For diameters＞15.00 mm: 100% ultrasonic testing. For diameters of 1.2-50.0mm: Eddy curent tests fro ground products visual inspection.
| Diameter(mm) | Hardness(HV 30) |
| 3.0-10.0 | ＞420 |
| 10.0-30.0 | ＞400 |
| 30.0-50.0 | ＞380 |
| ≥50 | ＞350 |
Surface condition:
| Diameter (mm) | Surface condition |
| ≤2.50 | ground Ra≤0.8μm |
| 2.50-30.0 | ground Ra≤1.0μm |
| 30.0-50.0 | ground Ra≤1.2μm |
| ≥50.0 | Turned Ra≤3.2μm |