Super Steel Duplex Bars

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Super duplex bars are stainless steel bars with a balanced ferritic and austenitic structure. They provide remarkable strength and high resistance to corrosion especially in chloride-rich conditions. With higher levels of chromium (24–27%), nickel (6–8%), molybdenum (3–5%) and nitrogen (0.24–0.32%), they outperform standard duplex steels. These elements give them protection against pitting, crevice corrosion and stress corrosion cracking. Super duplex steel also has a density of 7.8 g/cm³ and a melting point of around 1350 °C. Metracore Alloys produces these bars under stringent quality control, ensuring longevity and dependability in harsh environments. Their mechanical properties include very high tensile and yield strength, excellent toughness, impact resistance, and the ability to endure dynamic loads.

super duplex round bar, super duplex bar, super duplex flat bar

Super duplex steel bars are produced in compliance with ASTM A276, A479 / ASME SA276, SA479. They are available in round, square, hex, and rectangular forms with diameters ranging from 4mm to 500mm and lengths from 1 to 6 meters. These bars are known for their high strength, superior corrosion resistance, and durable microstructure. The dual-phase balance gives them flexibility, wear resistance, and stability even in seawater, acidic, and other aggressive conditions. Their outstanding mechanical and corrosion resistance properties make them the preferred choice for industries that demand durability and performance.

These bars are used in different industries where reliability and safety are important. As they can endure sour gas conditions they are used in oil and gas in wellhead tools, pumps, valves and subsea equipment. Propellers, shafts, and rudders are examples of marine applications where strength and resistance to corrosion are crucial. They are appropriate for mixers, tanks, and process equipment in chemical plants because they can tolerate strong acids like phosphoric, nitric, and sulfuric acid. Additional typical applications include water treatment facilities, desalination plants, pollution control systems, the manufacturing of paper and pulp, pump shafts, fasteners, and even the processing of food and vegetables where wear and erosion are issues. In the manufacturing process, alloy and scrap are melted in an electric arc furnace, refined in an AOD converter, and then cast, forge, and rolled. Prior to final finishing, the microstructure is refined by heat treatment and solution annealing.

SUPER DUPLEX BAR SUPPLIERS, SUPER DUPLEX ROUND BAR STOCK, SUPER DUPLEX STEEL BARS MANUFACTURER

All of our Super steel duplex bars come with certifications as per ASTM, ASME, and EN standards, along with a Mill Test Certificate for chemical and mechanical traceability. Our packaging options include wooden boxes, steel-strapped bundles, plastic wrapping, or custom packaging to prevent damage during handling and transit. This careful handling ensures Super Steel Duplex Bars reach customers in perfect condition, ready for heavy-duty service in critical environments.

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Table of Content

Super Steel Duplex Bars Specification

Types of Super Steel Duplex Bars

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Technical Details of Super Steel Duplex Bars

Dimensions of Super Steel Duplex Bars

Metric		US Bar		ASTM/ Canadian		Japanese
Bar Size	Diam. (mm)	Bar Size	Diam. (Inch)	Bar Size	Diam. (mm2)	Bar Size	Diam. (mm)
5	5	#2	0.250	10M	100	6	6
5.5	5.5	#3	0.375	15M	200	10	10
6	6	#4	0.500	20M	300	13	13
7	7	#5	0.625	25M	500	16	16
8	8	#6	0.750	30M	700	19	19
9	9	#7	0.875	35M	1000	22	22
10	10	#8	1.000	45M	1500	25	25
11	11	#9	1.125	55M	2500	29	29
12	12	#10	1.250			32	32
14	14	#11	1.375			35	35
16	16	#12	1.500			38	38
18	18	#13	1.625			41	41
20	20	#14	1.750			44	44
22	22	#15	1.875			48	48
25	25	#16	2.000			51	51
28	28	#18	2.250			57	57
32	32
36	36
40	40
44	44
50	50

Weight Chart of Super Steel Duplex Bars

Size	9mm	8mm	3/16″	7mm	7/32″	6mm	5mm	5/16″	4mm	1/8″	5/32″	1/4″	3mm
Kg / Foot	0.152	0.12	0.043	0.091	0.058	0.068	0.047	0.118	0.03	0.019	0.029	0.076	0.017
Kg / Mtr	0.498	0.398	0.141	0.298	0.19	0.223	0.154	0.387	0.098	0.062	0.095	0.249	0.055
Size	7″	6-1/2″	4″	5-1/2″	4-1/2″	4-3/4″	4-1/4″	6″	3-3/4″	3-1/4″	3-1/2″	5″	3″
Kg / Foot	59.432	51.093	19.306	36.69	24.4487	27.366	21.908	43.86	17.001	12.8	14.85	30.461	10.9
Kg / Mtr	196	167.63	63.34	121	80.34	90.249	72.249	143.9	55.78	41.996	48.772	99.94	35.762

Manufacturing Process of Super Steel Duplex Bars

Super Steel Duplex Bars Application

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