molybdenum Products
ASTM B387 Type 361 Bars & Rods
Table of Content
- About ASTM B387 Type 361
- Leading Manufacturer & Supplier of ASTM B387 Type 361 Rods & Bars
- Manufacturing Process of ASTM B387 Type 361 Bars & Rods
- Technical Specifications of ASTM B387 Type 361 Rods
- Chemical Composition (wt.%) of ASTM B387 Alloy Bars
- ASTM B387 Bars and Rods Mechanical Properties
- ASTM B387 Rod Stock Sizes Chart
- Other Equipment Grades of ASTM B387 Rods & Bars
- Frequently Asked Questions on ASTM B387 Type 361 Rods & Bars
About ASTM B387 Type 361
ASTM B387 Type 361 is the unalloyed powder metallurgy molybdenum, which has good strength, as well as corrosion resistance. The advanced powder metallurgy techniques were used to produce Molybdenum 361 which guarantees consistency and uniformity of quality, mechanical properties, and high performance in high temperature conditions. It has an outstanding mechanical integrity at extreme temperatures, it has excellent resistance to chemical corrosion, and the thermal expansion is low, thereby providing dimensional stability.
ASTM B387 Type 361 molybdenum has a melting point of about 2,623 °C (4,753 °F) and is suitable in vacuum furnaces, heating elements, aerospace parts, high temperature laboratory facilities, research and development, machining, and precision tooling. All Molybdenum 361 rods and bars are lot-controlled and stress-relieved high high-temperature pressed and sintered, and each shipment is accompanied by a material certificate to ascertain traceability and compliance with international procedures. ASTM B387 Type 361 is the material of choice when industries need strength, stability and performance that can be relied upon even in the most extreme conditions, available in standard length of 1 meter and custom sizes available on request.
Leading Manufacturer & Supplier of ASTM B387 Type 361 Rods & Bars
Lakshya Steel is a world-renowned manufacturer and reliable supplier of ASTM B387 Type 361 rods and ASTM B387 Type 361 bars and has an extensive stock of standard sizes, not to mention the custom dimensions and lengths. Lakshya Steel will be devoted to the ISO-certified quality standards and strictly controlled processes and strict quality assurance as every order of Molybdenum 361 will be provided as per the international standards.
Manufacturing Process of ASTM B387 Type 361 Bars & Rods
The process of manufacturing ASTM B387 Type 361 bars and rods requires a number of procedures to ensure uniform quality, strength, and reliability. Molybdenum 361 billets are large and are heated and rolled or extruded to the required sizes. These are used to obtain good strength, smooth surfaces and correct dimensions. The inspection of the bars and the rods is particularly done during production to locate any defects that may influence the performance especially in the context of high temperature or corrosion conditions. Further forging and finishing enhance the strength, hardness and corrosion resistance of the material, so that Molybdneum 361 is robust enough to handle the demanding requirements of the aerospace and other high-performance industries.
There are also strict process and temperature regulations throughout. This assists in more retained natural properties of Molybdenum 361, producing ASTM B387 Type 361 rods and bars that are able to perform effectively even in harsh environments.
Technical Specifications of ASTM B387 Type 361 Rods
| Specification | Value |
| Standard | ASTM B387 Molybdenum and Molybdenum Alloy Bar, Rod, and Wire |
| Grade | Molybdenum 360, Molybdenum 361, Molybdenum Alloy 363, Molybdenum Alloy 364, Molybdenum 365, Molybdenum Alloy 366 |
| Condition & Finish | Furnished in the wrought and stress-relieved condition; Black, chemical cleaned |
| Type | Bar, Rod, Wire |
| Bar and Rod | Any straight product with a round, rectangular, hexagonal, or octagonal solid cross-section, 4 in. (101.6 mm) in diameter or less, or of equivalent cross-sectional area. |
| Wire | Any product furnished in coils or on spools or reels. This specification covers wire no smaller than 0.020 in. (0.51mm) in diameter or equivalent cross-sectional area. Specification F289 covers diameters up to 0.020 in. |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Test | Tensile Test |
Chemical Composition (wt.%) of ASTM B387 Alloy Bars
| C | O, maxA | N, maxA | Fe, max | Ni, max | Si, max | Mo |
|---|---|---|---|---|---|---|
| 0.010 max | 0.0070 | 0.002 | 0.010 | 0.005 | 0.010 | balance |
ASTM B387 Bars and Rods Mechanical Properties
| TemperB | Diameter, in (mm) | Tensile Strength, min ksi (Mpa) |
Yield Strength, 0.2 % Offset, min, ksi [Mpa] |
Elongation in 1 in. (50 mm) min, % |
Diamond Pyramid Hardness Vickers-10 kg |
|---|---|---|---|---|---|
| SR | 0.020 to 1/8 (0.51 to 3.18), incl | 85 (585) | 65 (450) | 15C | – |
| over 1/8 to 1 3/32 (3.18 to 10.32) | 75 (515) | 55 (380) | 15 | – | |
| over 1 3/32 to 7/8 (10.32 to 222) | 90 (620) | 75 (515) | 18 | 230 to 280 | |
| over 7/8 to 1 1/8 (22.2 to 28.6) | 85 (585) | 70 (480) | 15 | 225 to 270 | |
| over 1 1/8 to 1 7/8 (28.6 to 47.6) | 75 (515) | 65 (450) | 10 | 215 to 260 | |
| over 1 7/8 to 2 7/8 (47.6 to 73.0) | 70 (480) | 60 (415) | 10 | 210 to 250 | |
| over 2 7/8 to 3 1/2 (73.0 to 88.9) | 65 (450) | 55 (380) | 10 | 205 to 240 | |
| XR | Under 2 (50.8) | 60 (415) | 35 (240) | 20 | 200 max |
| 2 to 3 1/2 (50.8 to 88.9) | 55 (380) | 25 (170) | 20 | 200 max |
ASTM B387 Rod Stock Sizes Chart
| 0.00157″ Dia x spool | 0.020″ Dia x spool | 0.3125″ Dia x 72″ Lg |
| 0.002″ Dia x spool | 0.030″ Dia x coil | 0.375″ Dia x 72″ Lg |
| 0.0024″ Dia x spool | 0.040″ Dia x coil | 0.625″ Dia x 72″ Lg |
| 0.00315″ Dia x spool | 0.040″ Dia x 72″ Lg | 0.750″ Dia x 72″ Lg |
| 0.0035″ Dia x spool | 0.050″ Dia x coil | 1″ Dia x 72″ Lg |
| 0.004″ Dia x spool | 0.060″ Dia x coil | 1.125″ Dia x 72″ Lg |
| 0.005″ Dia x spool | 0.062″ Dia x 72″ Lg | 1.250″ Dia x 72″ Lg |
| 0.006″ Dia x spool | 0.070″ Dia x coil | 1.500″ Dia x 72″ Lg |
| 0.007″ Dia x spool | 0.080″ Dia x coil | 1.750″ Dia x 36″ Lg |
| 0.008″ Dia x spool | 0.093″ Dia x coil | 2″ Dia x 36″ Lg |
| 0.009″ Dia x spool | 2.9mm Dia x coil | 2.250″ Dia x 24″ Lg |
| 0.010″ Dia x spool | 2.9mm Dia x 36″ Lg | 2.500″ Dia x 24″ Lg |
| 0.012″ Dia x spool | 0.125″ Dia x 72″ Lg | 2.750″ Dia x 24″ Lg |
| 0.015″ Dia x spool | 0.188″ Dia x 72″ Lg | 3″ Dia x 24″ Lg |
| 0.5mm Dia x spool | 0.250″ Dia x 72″ Lg |
Other Equipment Grades of ASTM B387 Rods & Bars
- Molybdenum 360—Unalloyed vacuum arc-cast molybdenum.
- Molybdenum Alloy 363—Vacuum arc-cast molybdenum–0.5 % titanium–0.1 % zirconium (TZM) alloy.
- Molybdenum Alloy 364—Powder metallurgy molybdenum–0.5 % titanium–0.1 % zirconium (TZM) alloy.
- Molybdenum 365—Unalloyed vacuum arc-cast molybdenum, low carbon.
- Molybdenum Alloy 366—Vacuum arc-cast molybdenum, 30 % tungsten alloy.
Frequently Asked Questions on ASTM B387 Type 361 Rods & Bars
What is Molybdenum 361?
What is Molybdenum 361 used for?
Molybdenum 361 is widely used in high-temperature and corrosive environments, such as:
- Aerospace components and propulsion systems
- Vacuum furnaces and heating elements
- Semiconductor equipment
- Research and precision tooling applications
It is chosen wherever high strength, low thermal expansion, and chemical resistance are critical.
What is the ASTM B387 equivalent to?
ASTM B387 specifies molybdenum and molybdenum alloy rods, bars, and wire. The closest ASTM material equivalents include:
- ASTM B386 for molybdenum and TZM alloys
- Sometimes compared with ASTM A387 in applications requiring high-temperature strength and corrosion resistance, though ASTM A387 is generally for steel alloys.
What is ASTM A387 material?
Our Products
Our Latest Blogs
Complete Guide to 304 Stainless Steel Tubes (304 SS Tubes)
Introduction to 304 Stainless Steel Tubes Industrial piping and construction is an industry that...
Hastelloy C276 Round Bars: Complete Guide
Hastelloy C276 is a superalloy that is known to be very versatile and possess remarkable high...
SAE 8620 Alloy Steel: Chemical Composition, Heat Treatment & Applications
SAE AISI 8620 steel is a widely used alloy that is prized for its combination of strength,...

