Home > Duplex Steel > Duplex Steel Bars
We proudly provide an extensive range of Duplex Steel Bars, thoughtfully procured from respected suppliers celebrated for their expertise in producing top-grade duplex steel goods. These bars act as essential elements across numerous applications, delivering unrivaled flexibility in dimensions, grades, and compliance with industry norms to satisfy the varied requirements of our clientele. Sought after in both the construction and engineering fields, our premium Duplex Steel Bars are valued for their exceptional resistance to corrosion and wear, guaranteeing extended longevity in demanding conditions. Through the use of duplex alloys, these bars experience a transformative boost in hardenability during heat treatment, yielding consistently enhanced mechanical characteristics throughout their cross-section.
| Duplex Steel Bar Standard | ASTM A276, AMS 5513, AMS 5511, AMS 5647 |
|---|---|
| Duplex Steel Bar Dimensions | EN, DIN, JIS, ASTM, BS, ASME, AISI |
| Duplex Steel Round bar size | Diameter: 3-~800mm |
| Duplex Steel Hex Bar size | 2-100mm A/F |
| Duplex Stainless Steel Flat bar size | Thickness: 2 -100mm |
| Width: 10 to 500mm | |
| Duplex Steel Square bar size | 4 to 100mm |
| Duplex Steel Angle bar size | 3mm*20mm*20mm~12mm*100mm*100mm |
| Duplex Rectangular Bars Section | 3.0 to 12.0mm thickness |
| Duplex Steel Channel Bar | 80 x 40mm to 150 x 75mm section; 5.0 to 6.0mm thickness |
| ASTM A276 Type Hollow Bar | 32mm OD x 16mm ID to 250mm OD x 200mm ID) |
| Duplex Stainless Steel Threaded Bar Billet Size | 1/2 to 495mm Diameter |
| Duplex Steel Rectangular Size | 33 x 30mm to 295 x 1066mm |
| Duplex Hex Bars Finish | Cold (bright) drawn, centreless ground, hot rolled, smooth turned, peeled, slit rolled edge, hot rolled annealed, Rough Turned, Bright, Polish, Grinding, Centreless Ground & Black |
| ASTM A276 Type Hollow Bar Tolerance | H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements |
| SAF 2507 T-Bar Surface | Bright, Hot Rolled Pickled, Cold Drawn, Sand Blasting Finished, Polished, Hairline |
| Rolled Duplex Steel Flat Bars Condition | Hardened & tempered, annealed |
| ASTM A276 Type Cold Rolled Bar Technique | Duplex Hot Rolled, Cold Drawn, Cold Rolled, Forged Round Bar, Rod |
| Duplex Rod Processing | Bar cutting to 650mm |
| Duplex Rounds Bar Form | Round, Rod, T-Bar, Channel Bar, Precision Ground Bar, Flat Bar, Square, Blocks, Round Rod, Rings, Hollow, Triangle, Rectangle, Hex (A/F), Threaded, Half Round Bar, Profiles, Billet, Ingot, I/H Bar, Forging etc. |
| Grade | YS (MPa) | UTS (MPa) | % Elongation | Hardness(BHN) |
| 31803 | 450 min. | 620 min. | 25 min. | 293 max. |
| 2205 | 450 min. | 655 min. | 25 min. | 293 max. |
| Grade | UNS No | C % | Cr % | Ni % | P % | Si % | S % | Mo % | N % | Mn % |
| 31803 | S31803 | < 0.03 | 21.0-23.0 | 4.5-6.5 | 1.03 max | 1 max | 0.02 max | 2.5-3.5 | 0.08-0.2 | < 2.0 |
| 2205 | S32205 | < 0.03 | 22.0-23.0 | 4.5-6.5 | 0.03 max | 1 max | 0.02 max | 3.0-3.5 | 0.14-0.20 | < 2.0 |
At Koasteel, we take pride in being the largest supplier and manufacturer in the New Zealand, delivering advanced solutions for every one of your piping requirements. With cutting-edge production facilities strategically situated in the New Zealand, we hold an extensive stock of more than 25,000 tons of top-quality materials kept readily on hand.
Reach out to us for a fast quote tailored to your requirement.
We provide these Duplex Steel Bars in accordance with DIN, ISO, JIS or ANSI Standard.
Duplex Steel Bars serve applications as varied as the sectors they support, led chiefly by the aerospace, railway, construction and automotive industries along with petrochemical, nuclear, medical, Oil & Gas, Chemical, Pharmaceutical, Food & Beverage, Nuclear, Thermal Power plants, Paper and Pulp, marine and mining, etc.
Yes,Duplex stainless steel bars can be recycled once they have been used. Stainless steel, Duplex steel included, is highly recyclable and can be melted down and repurposed into new products without losing its inherent properties. Recycling stainless steel is a sustainable practice that helps preserve resources and lessens the environmental impact of mining and producing new materials. On top of that, the recycling process for stainless steel uses less energy than creating new stainless steel from raw materials, making it an environmentally friendly choice.
Yes, Duplex Steel Bars are weldable through standard welding techniques including gas tungsten arc welding (GTAW), gas metal arc welding (GMAW), shielded metal arc welding (SMAW), and submerged arc welding (SAW). That said, it’s essential to adhere to correct welding practices in order to preserve the material’s resistance to corrosion and its mechanical characteristics.
Duplex Steel Bars provide benefits over austenitic stainless steels through greater strength and improved resistance to stress corrosion cracking, particularly in chloride environments. Duplex Steel Bars deliver better toughness and flexibility than ferritic stainless steel.
Email: sales@koasteel.nz