TZM Rod
2.Catalog: Molybdenum alloy
3.Material: Molybdenum (Mo), Titanium (Ti), Zirconium (Zr)
4.Grade: TZM
5.Main Component: Mo + 0.40-0.55%Ti + 0.06-0.12%Zr + 0.01-0.04% C
6.Density: 9.8-10.2 g/cm3
7.Specification: Dia 0.4mm-120mm, Length ≤2000mm.
8.Operating temperature: 700-1400℃
9.Form: Rod, Bar, Wire, Electrode, Straight
10.Production Process: Powder metallurgy, Sintered, Forged, Annealing
11.Surface: Black, Chemical cleaning, Polished, Grinding, Ground finish.
12.Standard: ASTM B 387
Introduction
TZM rod is a high-strength molybdenum alloy (Ti-Zr-Mo) bar engineered for high-temperature, high-stress, and vacuum environments, widely used in aerospace, furnace components, and hot-working tooling.
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Molybdenum-Zirconium-Titanium (TZM) Alloy Rod Specification and Tolerance |
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|
Product |
Diameter |
Tolerance |
|
Forged Rod |
>80mm |
+/-2.0mm |
|
25mm-80mm |
+/-1.0mm |
|
|
Rotary Forged Rod |
10mm-25mm |
+/-0.2mm |
|
3.0mm-10mm |
+/-0.1mm |
|
|
Lathe Turning Rod |
>20mm |
+/-0.2mm |
|
Straightening Rod |
0.5mm-3.0mm |
+/-0.03mm |
|
Polished Rod |
0.8mm-50mm |
+/-0.2mm |
Product Chemical Composition
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TZM Rod Chemical Composition |
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Main Composition(%) |
Impurity Content(%) |
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|
Mo |
Ti |
Zr |
C |
Al |
Mg |
Fe |
Ni |
Si |
N |
O |
|
Bal |
0.4-0.6 |
0.06-0.12 |
0.01-0.04 |
≤0.002 |
≤0.002 |
≤0.01 |
≤0.005 |
≤0.01 |
≤0.003 |
≤0.03 |
Product Properties
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TZM Rod Mechanical Property Parameter |
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Grade |
State |
Diameter (mm) |
Tensile Strength (Rm) /MPa |
Yield strength (Rp02) /MPa |
Elongation Z, % |
|
TZM |
Forged stress-free state |
<22 |
≥790 |
≥690 |
≥13 |
|
≥22~28 |
≥760 |
≥655 |
≥10 |
||
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≥28~48 |
≥690 |
≥585 |
≥6 |
||
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≥48~73.0 |
≥620 |
≥550 |
≥6 |
||
|
≥73.0~90 |
≥585 |
≥515 |
≥5 |
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Comparison of Physical Properties between TZM and Various High Temperature Alloys |
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Item |
TZM Alloy |
Molybdenum-Hafnium-Carbon (MHC) Alloy |
Tungsten Based Alloy |
Nickel-Based Superalloy |
Titanium Aluminum Superalloy |
Niobium Based Superalloy |
Iron Based Superalloy |
|
Density g/cm3 |
10.13 |
10.23 |
19.3 |
8.9 |
4.54 |
8.57 |
7.86 |
|
Thermal Conductivity w/m.k |
135 |
135 |
173 |
90 |
/ |
53.7 |
46.52 |
|
Specific heat kj/kg.℃ |
0.25 |
0.25 |
0.14 |
0.46 |
/ |
0.26 |
0.45 |
|
Coefficient of thermal expansion mm/℃ |
0.0052 |
0.0052 |
0.0046 |
/ |
/ |
/ |
0.016-0.018 |
|
Melting point |
2610℃ |
2610℃ |
3410±20℃ |
1453±1℃ |
1669℃ |
2468℃ |
1535℃ |
|
Boiling point |
5560℃ |
5560℃ |
5927℃ |
2800℃ |
/ |
4744℃ |
2750℃ |
|
Comparison of Mechanical Properties Between TZM and Various High-temperature Alloys |
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|
Item |
TZM Alloy |
Molybdenum-Hafnium-Carbon (MHC) Alloy |
Tungsten Based Alloy |
Nickel-Based Superalloy |
Titanium Aluminum Superalloy |
Niobium Based Superalloy |
Iron Based Superalloy |
|
Temperature |
1200℃ |
1400℃ |
1100℃ |
1000℃ |
470℃ |
1600℃ |
850℃ |
|
Tensile strength σb(MPa) |
370 |
300 |
488 |
170 |
65 |
92.3 |
88 |
|
Yield strength σs(MPa) |
310 |
283 |
/ |
136 |
52 |
81.2 |
70.4 |
|
Rate of elongation δ(%) |
＞20% |
＞15% |
/ |
55% |
75% |
32.9% |
55% |
Advantages
Enhanced Load-Bearing Strength
Significantly stronger than pure molybdenum at elevated temperatures, ensuring better load-bearing capacity in demanding applications.
Creep Resistance
Resists deformation under long-term high temperature and stress, extending service life in furnace and hot-working environments.
High Temperature Resistance
With a higher recrystallization temperature, TZM maintains mechanical stability at temperatures where pure molybdenum fails.
Reliable Dimensional Stability
Low thermal expansion reduces distortion during thermal cycling, critical for precision components and tooling.
FAQ
Can TZM rods be customized?
A: Yes, diameter, length, straightness, surface finish, and tolerance can be tailored to technical drawings or specific industrial requirements.
How does TZM perform under thermal cycling?
A: Low thermal expansion and high creep resistance ensure dimensional stability and minimal deformation during repeated high-temperature cycles.
Is TZM machinable or weldable?
A: Yes, it is machinable with standard refractory metal tools. Welding is feasible under controlled environments; technical guidance is available.
What certifications are available?
A: Material certificates, chemical analysis, and mechanical test reports are provided to ensure compliance and traceability.
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