ASTM A276 and ASTM A479 Tantalum Round Bar Weight, Dimensions Chart in mm, kg, PDF online

Tantalum round bars, also known as tantalum rods, are cylindrical metal bars made of tantalum. Tantalum is a rare, dense, blue-gray metal that is highly resistant to corrosion. It has a high melting point and is good conductor of heat and electricity. These properties make tantalum an ideal material for a wide range of applications, including aerospace, chemical processing, electronics, and medical devices.

Tantalum round bars have many beneficial properties, which are useful in applications.These properties are that they are highly corrosion resistant, have high melting point, good conductor of heat and electricity, biocompatible and non-toxic, and are strong and durable. Different types of tantalum round bars are hot-rolled round bars, cold-drawn round bars, and peeled and polished round bars. Tantalum round bars come in a variety of sizes and diameters to suit different applications. Tantalum round bars are manufactured according to various international standards and specifications to ensure quality and compatibility with the intended application. Common standards include ASTM A276 and ASTM A479. Refer to weight and dimensions chart PDF for tantalum round bar in mm, kg given below.

Tantalum round bar is a versatile material that can be used in a wide range of applications:

• Semiconductor manufacturing
• Laboratory benches and equipment
• Medical devices
• Heated exchangers
• Chemical containers, including for transport
• Aerospace applications
• Jet turbines
• Capacitors

Tantalum Bar Specifications

Tantalum Bar Length	2 to 6 meters or 8 to 20 feet
Tantalum Rod Chamfering	Available in 30, 45 & 60 degree thru fully automatic both-end chamfering machine
Ultrasonic Test of ASTM A276 Threaded Rod	As per ASTM A-388, EN 10308 (class 1 to 4), API 6A/ISO it is 100% tested thru Digital Ultrasonic Flaw Detector, 10423:2003-PSL 3, MIL STD 2154, SEP 1920:1984
Tantalum Round Bar Size Tolerances	h11
Tolerance of Cold Rolled Tantalum Round Bar Length	Stock in special cut to length bar in tolerance – 0/+10mm (-0 +0.5 inch)
Surface Finish of Cold Rolled Tantalum Bar	Cold drawn or Belt polished condition
Bar Heat Treatment	Annealed and Solution Annealed

ASTM A276 Tantalum Round Bar Grades

300 Series Tantalum Grades	Tantalum 303, 304, 304L, 309, 310, 316, 316L, 316H, 317, 317L, 321, 347
400 Series Tantalum Grades	410, 410PSQ, 410QDT, 410HT, 416, 416HT, 416PSQ, 420

ASTM A276 Standard Tantalum Rod Sizes

Type	SIZES in milimeter	SIZES in inches	Tolerance
Peeled and Polished	40.00 - 150.00	1.50 - 6.00	h11, h11-DIN 1013
Cold Drawn and Polish	3.00 to 75.00	1/8 to3.00	h8 to h11
Cold Drawn and Ground	10.00 to 75.00	5/6 to 2.50	h8 to h11
Peeled nd Ground	20.00 - 50.00	3/4 - 2.00	h9 to h11

ASTM A276 Tantalum Round Bars Standard lengths of 2000 mm up to 6000 mm

5.0	45.0
6.0	50.0
7.0	55.0
8.0	60.0
9.0	65.0
10.0	70.0
12.0	75.0
16.0	80.0
20.0	90.0
25.0	100.0
30.0	130.0
35.0	160.0
40.0	200.0

ASTM A479 Tantalum Round Bar Chemical Composition

ASTM Grade	Carbon	Manganese	Silicon	Sulfur	Phospherous	Chromium	Nickel	Molybdenum	Other
304	0.08 max	2.00 max	0.75 max	0.030 max	0.045 max	18.0-20.0	8.0 11.0	-	-
316	0.08 max	2.00 max	0.75 max	0.030 max	0.045 max	16.0-18.0	10.0 14.0	2.0 3.0	-
317L	0.035 max	2.00 max	0.75 max	0.030 max	0.045 max	18.0-20.0	11.0 14.0	3.0 4.0	-
310 S	0.08 max	2.00 max	1.5 max	0.030 max	0.045 max	24.0-26.0	19.0 22.0	3.0 4.0	-
347 H	0.04 0.10	2.00 max	0.75 max	0.030 max	0.045 max	17.0- 19.0	9.0 13.0	-	10C(Cb+Ta)<1.10%
321	0.08	2.00 max	0.75 max	0.030 max	0.045 max	17.0-20.0	9.0 12.0	-	5C 0.70%

ASTM A276 Mechanical Properties of Forged Tantalum Round Bar

Grade	Elongation	Density	Tensile Strength	Yield Strength (0.2%Offset)	Melting Point
Tantalum 202	40 %	8.0 g/cm3	515 MPa	275 MPa	1454 °C (2650 °F)
Tantalum 303	50 %	55%	Psi – 85,000	Psi – 45,000	Rb 180
Tantalum 304	40%	8.0 g/cm3	Psi – 75000 , MPa – 515	Psi – 30000 , MPa – 205	1400 °C (2550 °F)
Tantalum 304L	40%	8.0 g/cm3	Psi – 75000 , MPa – 515	Psi – 30000 , MPa – 205	1400 °C (2550 °F)
Tantalum 316	35 %	8.0 g/cm3	Psi – 75000 , MPa – 515	Psi – 30000 , MPa – 205	1454 °C (2650 °F)
Tantalum 316L	40 %	8.0 g/cm3	485 Min	170 Min.	1400 °C (2550 °F)

ASTM A276 Round Tantalum Bars Weight

Diameter(mm)	Weight Chart(kg)	Dia(in)	Weight Chart(kg)
3mm	0.06	1/8"	0.06
4mm	0.10	3/16"	0.14
5mm	0.16	1/4"	0.25
6mm	0.22	5/16"	0.39
7mm	0.30	3/8"	0.56
8mm	0.40	7/16"	0.77
10mm	0.62	1/2"	1.00
12mm	0.89	9/16"	1.22
14mm	1.22	5/8"	1.56
15mm	1.40	11/16"	1.89
16mm	1.59	3/4"	2.25
18mm	2.01	7/8"	3.07
20mm	2.48	1"	4.03
22mm	3.00
24mm	3.57
25mm	3.88