OEM China Niobium Thick Pipe - China OEM Purity Polished Tungsten Rods – Forged Tungsten

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Dedicated to strict high-quality management and considerate shopper company, our experienced team associates are normally available to discuss your requirements and ensure full shopper gratification for Polished Tungsten Rods, Purity Tungsten Rods, Tungsten Bars, The best and original quality for spare parts is a most important factor for transportation. We may stick on supplying original and good quality parts even a little profit earned. God will bless us to do kindness business forever.
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

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