Molybdenum rod

ASTM A387 molybdenum welding/ threaded/carbide rod suppliers in mumbai, India

ASME SA387 Molybdenum Round Bar Manufacturer in India

ASTM A387 is a specification that caters to applications that require elevated temperatures. Particularly, the Molybdenum Rod is a resource in the manufacture of both welded broilers and pressure vessels, due to its chemistry. This specification covers several chromium-molybdenum alloy steel components like rods and bars. Manufacturers can use any one of the following grades as a material to produce a Molybdenum Round Bar, like – grade 2, grade 12, grade 11, grade  22, grade 22L, grade 21, grade 21L, grade 5, grade 9, and grade 91.

This specification demands that the steel used is to be killed as well as thermally treated. The main characteristic of killed steel is that it is completely deoxidized. Since the material for an ASME SA387 Molybdenum Threaded Rod is devoid of any oxygen, there is no progression of gas during solidification. This in turn ensures that the rod is not porous or structurally weak. The steel bars and rods are required to undergo heat analysis and product analysis.

The different elements used to alloy the ASTM A387 Molybdenum Welding Rod must conform to the chemical conditions as mentioned in the specification. Lastly, all components that fall under this specification are required to undergo certain tests. For instance, a tension test is conducted on the rod and the values obtained with regards to properties like tensile strength, yield strength, and elongation must meet the specification.

Molybdenum Rod
Molybdenum Rod
ASTM A387 Molybdenum Round Bar
ASTM A387 Molybdenum Round Bar
ASME SA387 Molybdenum Threaded Rod
ASME SA387 Molybdenum Threaded Rod

 

Specification of Molybdenum Rods
  • Standard : ASTM B387
  • Material : Mo >99.95%
  • Density : 9.8 ~ 10.2g/cc
Properties of Molybdenum Rod

Molecular Weight
95.94
Appearance
Silvery
Melting Point
2623 °C
Boiling Point
4639 °C
Density
10280 kg/m3
Solubility in H2O
N/A
Electrical Resistivity
5.2 microhm-cm @ 0 °C
Electronegativity
1.9 Paulings
Heat of Fusion
6.6 Cal/gm mole
Heat of Vaporization
128 K-Cal/gm atom at 4612 °C
Poisson’s Ratio
0.31
Specific Heat
0.0599 Cal/g/K @ 25 °C
Tensile Strength
N/A
Thermal Conductivity
1.38 W/cm/K @ 298.2 K
Thermal Expansion
(25 °C) 4.8 µm·m-1·K-1
Vickers Hardness
1530 MPa
Young’s Modulus
329 GPa

ASTM A387 Alloy Steel Round Bars Manufacturer

Equivalent Specifications of Molybdenum Rod

CZ121 CW614N CuZn39PB3
BS2874 BS249
Standard Molybdenum Rod

MO007900
 Diameter:6.0mm, Purity:99.9%, Condition:Centreless ground
MO007901
 Diameter:3.0mm, Purity:99.9%, Condition:Centreless ground
MO007902
 Diameter:1.5mm, Purity:99.9%, Condition:Centreless ground
MO007903
 Diameter:2.0mm, Purity:99.9%, Condition:Centreless ground
 
MO007904
 Diameter:4.0mm, Purity:99.9%, Condition:Centreless ground
MO007905
 Diameter:5.0mm, Purity:99.9%, Condition:Centreless ground
MO007906
 Diameter:5.0mm, Purity:99.98%
MO007907
 Diameter:3.5mm, Purity:99.9%, Condition:Centreless ground
MO007908
 Diameter:1.25mm, Purity:99.9%, Condition:Centreless ground
 
MO007910
 Diameter:8.0mm, Purity:99.9%, Condition:Centreless ground
MO007920
 Diameter:10.0mm, Purity:99.9%, Condition:Centreless ground
MO007922
 Diameter:12mm, Purity:99.9%, Condition:Centreless ground
MO007926
 Diameter:15.0mm, Purity:99.9%, Condition:Centreless ground
MO007931
 Diameter:20.0mm, Purity:99.9%, Condition:Centreless ground
MO007945
 Diameter:25mm, Purity:99.9%, Condition:Centreless ground
MO007950
 Diameter:30mm, Purity:99.9%, Condition:Centreless ground
MO007960
 Diameter:50mm, Purity:99.9%, Condition:Centreless ground
MO007975
 Diameter:75mm, Purity:99.9%, Condition:Centreless ground
MO007995
 Diameter:100mm, Purity:99.9%, Condition:Centreless ground

 

Chemical Composition of Molybdenum Rod


Grade

The impurity content is not more than %

Fe

Ni

Al

Si

Mg

C

N

O

Mo-1

0.01

0.005

0.002

0.01

0.005

0.01

0.003

0.008

Mo-2

0.01

0.005

0.005

0.01

0.005

0.01

0.003

0.02

Mechanical Properties of Molybdenum Rod

Properties
Metric
Imperial
Tensile strength (annealed)
324 MPa
47000 psi
Shear strength (torsional strain rate 0.25/s)
500 MPa
72500 psi
Compressive yield strength (0.01% yield)
400 MPa
58000 psi
Modulus of elasticity
330 GPa
47900 ksi
Modulus of elasticity at elevated temperature (@2000°C/3630°F)
160 GPa
23200 ksi
Poissons ratio (calculated)
0.38
0.38
Hardness, Brinell (converted from Vickers for 3000 kg load/10 mm ball Brinell test. annealed)
225
225
Hardness, Rockwell A (converted from Vickers. annealed)
60
60
Hardness, Rockwell B (converted from Vickers. annealed)
98
98
Hardness, Rockwell C (converted from Vickers. annealed)
19
19
Hardness, Vickers (annealed)
230
230
Physical Properties of Molybdenum Rod

Properties
Metric
Imperial
Density
10.3 g/cm³
0.369 lb/in³
Melting point
2625°C
4760°F
Molybdenum Rod Thermal Properties:

Properties
Metric
Imperial
Thermal expansion coefficient (@20°C/68°F)
5.35 µm/m°C
2.97 µin/in°F
Thermal conductivity
138 W/mK
958 BTU in/hr.ft².°F
Rods made of pure molybdenum Dimensions

Diameter[mm]
Length[mm]
Quality
Weight[kg]
2.000
500 – 3.000
ground
0.032
3.00
500 – 3.000
ground
0.072
3.175
500 – 3.000
ground
0.081
4.000
500 – 3.000
ground
0.128
4.750
500 – 3.000
ground
0.181
5.000
500 – 3.000
ground
0.200
6.000
500 – 3.000
ground
0.288
6.350
500 – 3.000
ground
0.323
7.000
500 – 3.000
ground
0.392
7.925
500 – 3.000
ground
0.503
8.000
500 – 3.000
ground
0.512
9.000
500 – 3.000
ground
0.649
9.525
500 – 3.000
forged
0.726
9.525
500 – 3.000
ground
0.726
10.000
500 – 3.000
ground
0.801
12.000
500 – 2.000
ground
1.153
12.000
500 – 2.500
ground
1.153
12.700
500 – 2.000
ground
1.291
12.700
500 – 2.000
forged
1.291
13.000
500 – 2.000
ground
1.353
41.000
500 – 2.000
ground
1.569
15.000
500 – 2.000
forged
1.802
15.000
500 – 2.000
ground
1.802
15.875
500 – 2.000
ground
2.018
16.000
500 – 2.000
forged
2.05
18.000
500 – 2.000
forged
2.594
19.050
500 – 1.700
forged
2.906
19.050
500 – 1.700
forged
2.906
19.050
500 – 1.700
ground
3.203
20.000
500 – 1.700
forged
3.203
22.000
500 – 1.700
ground
3.875
22.225
500 – 1.800
forged
3.955
25.000
500 – 2.000
ground
5.004
25.000
500 – 2.000
forged
5.004
25.400
500 – 2.000
ground
5.166
25.400
500 – 2.400
forged
5.166
30.000
500 – 2.000
ground
7.206
30.000
500 – 2.000
ground
7.206
33.000
500 – 2.400
forged
8.72
35.000
500 – 2.000
forged
9.809
38.100
500 – 2.000
forged
11.623
40.000
500 – 2.600
ground
12.811
45.000
500 – 2.200
forged
16.576
50.800
500 – 2.800
forged
20.663
55.000
500 – 2.300
forged
24.221
60.000
500 – 1.800
forged
28.825
63.500
500 – 3.000
forged
32.286
70.000
500 – 1.800
forged
39.234
80.000
500 – 3.000
forged
51.245
90.000
500 – 2.700
forged
64.857
100.000
500 – 2.200
smooth forged
80.07
120.000
500 – 2.000
smooth forged
115.301
120.000
500 – 2.000
smooth forged
115.301
140.000
300 – 500
smooth forged
156.937
165.000
300 – 500
extruded
217.991
Rods made of titanium-zirconium-molybdenum (TZM)

Diameter[mm]
Length[mm]
Quality
Weight[kg]
4.750
500 – 3.000
ground
0.181
6.000
500 – 3.000
ground
0.288
6.350
500 – 3.000
ground
0.323
8.000
500 – 3.000
ground
0.512
10.000
500 – 3.000
ground
0.801
12.700
500 – 2.000
forged
1.291
15.875
500 – 2.000
ground
2.018
16.000
500 – 1.600
forged
2.05
18.000
500 – 2.000
forged
2.594
19.050
500 – 1.500
ground
2.906
20.000
500 – 2.000
forged
3.203
22.225
500 – 2.000
forged
3.955
25.000
500 – 2.000
forged
5.004
25.400
500 – 1.900
forged
5.166
26.670
500 – 1.800
forged
5.695
30.000
500 – 1.600
forged
7.206
31.750
500 – 1.400
forged
8.072
33.000
500 – 1.400
forged
8.72
35.000
500 – 2.000
forged
9.809
40.000
500 – 3.000
forged
12.811
45.000
500 – 2.000
forged
16.214
49.500
500 – 1.600
forged
19.619
55.000
500 – 1.800
forged
24.221
63.500
500 – 2.800
forged
2.05
70.000
500 – 1.800
forged
2.594
80.000
500 – 2.500
forged
2.906
90.000
500 – 2.300
forged
2.906
100.000
500 – 3.000
forged
3.203
140.000
300 – 500
forged
3.203
165.000
300 – 500
forged
3.875
Application of Molybdenum Rod & Molybdenum Bar 

  • Used in electric vacuum parts, steel-making additives, gas pipes, sidebar, lead-wire, optical glass, daily-use glass, glass fiber and insulation material
  • Used to stretch into  molybdenum electrode and molybdenum wire 
molybdenum rod Standard Diameter Tolerances (inches)

Diameter
Black/Clean
Ground
.020 to .025
± .001
± .001
.025 to .070
± .0015
± .001
.070 to .200
± .002
± .001
.200 to .250
± .007
± .001
.250 to .437
± .007
± .0015
.437 to .750
± .010
± .003
.750 to 1.000
± .015
± .005
1.000 to 1.250
± .015
± .005
1.250 to 1.750
± .025
± .005
molybdenum Rod Standard Length Tolerances (Inches)

Diameter
.5″ to 12″
12″ to 24″
> 24″
.020 to .100
± .010
± .015
± .0625
.100 – .500
± .015
± .015
± .0625
.500 to 1.000
± .015
± .030
± .0625
1.000 to 1.500
± .030
± .0625
± .0625

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