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

Duplex round bars are solid cylindrical bars made from duplex stainless steel, a type of stainless steel known for its exceptional corrosion resistance, mechanical strength, and durability. Duplex round bars are typically made from duplex stainless steel grades, with common grades being 2205 (UNS S32205/S31803) and 2507 (UNS S32750). These grades typically consist of approximately 50% austenite and 50% ferrite phases. Detailed information on these grades can be obtained in duplex round bar weight and dimensions chart PDF.

Duplex round bars are corrosion-proof and rust-free, which makes them suitable for use in aggressive environments. Duplex stainless steel has higher mechanical strength than conventional austenitic stainless steels. This increased strength allows for the use of smaller-diameter round bars, reducing weight and cost while maintaining structural integrity. This property is advantageous in various high-stress applications. Duplex stainless steel round bars can be machined using standard machine tools, but it's important to use appropriate cutting tools and techniques due to their higher strength and work-hardening properties. Different types of duplex round bars are hot-rolled round bars, cold-drawn round bars, and peeled and polished round bars. Duplex round bars come in a variety of sizes and diameters to suit different applications. Duplex 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 duplex round bar in mm, kg given below.

Duplex round bars have some typical uses which include the following:

• Food and beverage processing equipment
• Pharmaceutical processing equipment
• Chemical processing equipment
• Nuclear power equipment
• Desalination equipment
• Marine engineering
• Water and wastewater treatment equipment
• General engineering applications

Duplex Bar Specifications

Duplex Bar Length	2 to 6 meters or 8 to 20 feet
Duplex 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
Duplex Round Bar Size Tolerances	h11
Tolerance of Cold Rolled Duplex Round Bar Length	Stock in special cut to length bar in tolerance – 0/+10mm (-0 +0.5 inch)
Surface Finish of Cold Rolled Duplex Bar	Cold drawn or Belt polished condition
Bar Heat Treatment	Annealed and Solution Annealed

ASTM A276 Duplex Round Bar Grades

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

ASTM A276 Standard Duplex 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 and Ground	20.00 - 50.00	3/4 - 2.00	h9 to h11

ASTM A276 Duplex 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 Duplex 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 Duplex Round Bar

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

ASTM A276 Round Steel 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