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Duplex Steel Fasteners

Kalpataru Piping Solutions is known as the leading duplex fastener manufacturer in India. We deliver high-quality duplex fasteners products, manufactured with international standards to fulfill the needs of industrial applications. These fasteners have higher tensile strength and yield strength to increase the life span.  The chemical composition of duplex steel fasteners has substances like 21% chromium and 2.5% molybdenum to offer high corrosion resistance.

We offer duplex fasteners with many types like screws, nuts, bolts & washers. We design duplex stainless steel fasteners in many sizes, diameters & wall thicknesses to fulfil the specific needs of clients by performing quality testing. We serve the products globally all across the world mainly covering countries like South Africa, Europe etc. Explore our duplex fasteners to request the best affordable price.

Grades of Duplex Steel Fasteners

Duplex Fasteners Specification

Standard ASTM A479 ASME SA479
Specification IS, BS, ASTM, ASME
Grade Duplex Steel | UNS S31803 |S32205
Size 3/6″ to 2″, M3 – M56, Custom Sizes
Length 3mm to 200mm
Form Screw, Nuts, Bolts, Washers
Application Engineering, Automobile Industry, Heat exchanger and condenser, Oil & Gas, Power plants, Refineries & Petrochemicals, Ship building,Desalination Plants

Chemical Composition of Duplex Steel Fasteners

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

Duplex Fasteners Mechanical Properties

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.

Duplex Steel Fasteners Physical Properties

Density (Kg / M3) Modulus of Elasticity (GPa) Poisson’s Ratio Thermal Conductivity (W/moC) Thermal Capacity (I/KgoC) Electrical Resistivity
7800 200 0.3 15 500 0.80

FAQ

What is a duplex bolt?

Duplex steel bolts are high-performance fasteners widely used in various industries because of their excellent corrosion resistance and strength. These bolts are made from a combination of austenitic and ferritic stainless steel, giving them superior mechanical properties to other common materials.

What are duplex screws used for?

The Duplex Screw is a reusable screw that is great for temporary structures, concrete form work, art installations, storm proofing, theater & stage sets, firework displays and other construction uses. Easy to install, remove and use again.

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Countries We Deliver

Iran, Venezuela, Saudi Arabia, Slovakia, Romania, Zimbabwe, Spain, Kazakhstan, Canada, Nigeria, Bulgaria, Afghanistan, Thailand, Bangladesh, Poland, United Kingdom, Bahrain, Jordan, Lithuania, Malaysia, France, Nigeria, Japan, Oman, Lebanon, Germany, Croatia, Australia, Puerto Rico, South Korea, Hungary, United States, Bhutan, Mexico, Mexico, Yemen, Singapore, New Zealand, Ecuador, Gabon, Qatar, Denmark, Iran, Netherlands, Norway, Sri Lanka, Belgium, Libya, Kuwait, Pakistan, Gambia, Sweden, Azerbaijan, Argentina, Chile, Ghana, United Arab Emirates, Finland, Nepal, Trinidad andamp; Tobago,Tunisia, Kenya, Peru, Austria, Russia, Ukraine, Italy, Belarus, Bolivia, Serbia, Poland, Mongolia, Turkey, Czech Republic, South Africa, Angola, India, Vietnam, Indonesia, Tibet, Ireland, Costa Rica, Greece, Colombia, Namibia, Iraq, Estonia, Israel, Macau, Philippines, Brazil, Switzerland, Algeria, Morocco, Chile, Portugal, Egypt, Taiwan, China, Hong Kong.

Cities We deliver

Bhopal, Lahore, Milan, Hyderabad, Pune, Vadodara, Pimpri-Chinchwad, Aberdeen, Howrah, Jeddah, Riyadh, Bogota, Petaling Jaya, Dallas, Lagos, Nagpur, Houston, Brisbane, Busan, Karachi, Coimbatore, Seoul, Caracas, Atyrau, Perth, Haryana, Bengaluru, Jaipur, Al Jubail, Kuwait City, Al Khobar, Sydney, Ranchi, Chiyoda, Noida, Chandigarh, Secunderabad, Ahvaz, Port-of-Spain, Singapore, Gurgaon, Rajkot, Rio de Janeiro, Abu Dhabi, Hong Kong, Surat, Sharjah, Hanoi, London, Muscat, Jakarta, Navi Mumbai, Istanbul, Kolkata, Cairo, Mumbai, Santiago, Montreal, Faridabad, Vung Tau, Bangkok, Ankara, Ahmedabad, Granada, Melbourne, Tehran, Visakhapatnam, New Delhi, Los Angeles, Ho Chi Minh City, Edmonton, La Victoria, Baroda, Thane, Nashik, Kuala Lumpur, Moscow, Ernakulam, Courbevoie, Calgary, Geoje-si, Indore, New York, Mexico City, Gimhae-si, Ludhiana, Kanpur, Ulsan, Thiruvananthapuram, Manama, Doha, Chennai, Madrid, Jamshedpur, Algiers, Dammam

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