Popular Design for Tungsten Welding Electrodes - OEM Customized Approved Pure Molybdenum Tube – Forged Tungsten

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Molybdenum rods Chemical composition:

Main and minor components Min.content(%) ASTM B386 (361)
Mo 99.95 balance
Impurities Max.values (μg/g) Max.values (μg/g)
Al 10 -
Cu 20 -
Cr 20 -
Fe 20 100
K 20 -
Ni 10 50
Si 20 100
W 300 -
C 30 100
H 10 20
N 10 70
O 40 -
Cd 5 -
Hg 1 -
Pb 5 -

Dimensions and tolerances:

Diameter (mm) Diameter tolerance (mm)
Ground
0.50-0.99 ±0.007
1.00-1.99 ±0.010
1.00-2.99 ±0.015
3.00-15.9 ±0.020
16.0-24.9 ±0.030
25.0-34.9 ±0.050
35.0-3939 ±0.060
≥40.0 ±0.20
Cleaned
0.50-4.0 ±2.0%
4.10-10.0 ±1.5%
15.0-50.0 ±0.30
51.0-75.0 ±0.40
75.1-120.0 ±1.00
121.0-165.0 ±1.50
Turned
40.0-49.9 ±0.30
50.0-165.0 ±0.40

Length and straightness:

Diameter (mm) Production length (mm) Stiraightness/Meter (mm)
Cleaned Ground/turned
0.50-0.99 >500 <2.5 <2.5
1.00-9.90 >300 <2.0 <1.5
10.0-165.0 >100 <1.5 <1.0

Length tolerance:

Diameter 0.50-30.0 mm
Nominal length (mm) 6-30 30-120 120-400 400-1000 1000-2000 >2000
Length tolerance(mm) ±0.2 ±0.3 ±0.5 ±0.8 ±1.2 ±2.0
Diameter >30.0 mm
Nominal length (mm) 6-30 30-120 120-400 400-1000 1000-2000 >2000
Length tolerance(mm) ±1.0 ±1.5 ±2.5 ±4.0 ±6.0 ±8.0

Density:
1. 00.50-40.0 mm ≥10.15g/cm³
2. 40.1-80.0 mm ≥10.10g/cm³
3. 80.1-120.0 mm ≥10.00g/cm³
4. 120.1-165.0 mm ≥9.90g/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) Tensile strength(MPa) 0.2% Yield Strength(MPa) Elongation(%) Hardness(HV 10)
0.50-3.18 ≥585 ≥450 ≥15  
3.18-10.30 ≥515 ≥380 ≥15  
10.32-22.20 ≥620 ≥515 ≥18 230-280
22.20-28.60 ≥585 ≥480 ≥15 225-270
28.60-47.60 ≥515 ≥450 ≥10 215-260
47.60-73.00 ≥480 ≥415 ≥10 210-250
73.00-88.90 ≥450 ≥380 ≥10 205-240
89.00-120.9 ≥450 ≥380 ≥5 200-240
121.0-164.9 ≥450 ≥380 ≥5 180-240
165.0 ≥450 ≥380 ≥- 180-240

Surface condition:

Surface: Cleaned Ground Turned
  φ0.50-165mm φ0.50-50.00mm φ≥40.00mm
Roughness Diameter (mm) Ra (μm) Ground Ra (μm) Turned
  ≤2.50 ≤0.80 -
2.5-50.0 ≤1.00 -
≥40.0 - ≤3.2

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