1/B, Ground Floor, Siddhi Apartment,
10th Khetwadi Back Road, Mumbai 400 004

Email
sales@dalloyedfasteners.com

Duplex Fasteners Manufacturer in India

Sizes in Stock: M4 to M120
Grades : Duplex 2205
Advantages : 2x Stronger Yield Strength Than SS 316
Steel : Austenitic
UNS Designation : UNS S32205
Stainless Series : 300 Series

WNR Designation: WNR 1.4462
Sizes Can Be Manufacture: Up to M180
Environments : Chloride
Ideal for : Saltwater Applications
Certificate : EN 10204/3.1B
Testing : Hardness Testing
Production Capacity : 1500 Tons per month

Buy 2205 Bolts in Size Ranging From M4 To M100 At Best Price

Duplex bolt and nut made from annealed austenitic stainless steel. Duplex stainless steel bolts offers better corrosion resistance and high strength compared to stainless steel 316L fasteners. Duplex screws are ideal for saltwater applications. Top 5 duplex fasteners manufacturer in India to ferritic and austenitic base alloys, Duplex nuts suitable for corrosive environments.

Table of Content

Duplex Fasteners Specifications
Duplex 2205 Fasteners Price List
Duplex Bolts Grade
Germany Standard for Duplex Steel Fasteners
Ideal Environment for Duplex Bolt and Nut
Corrosion Resistance of Alloy 2205 Stud Bolts
Hardness for 2205 Duplex Hex Bolt
American Standard for Duplex Stainless Steel Fasteners
Duplex Stainless Steel Nuts Heat Treatment
ASTM A276 Type 2205 Fasteners Temperature Range
Duplex Bolts Torque
Top 8 Advantages of Duplex Fasteners
2205 Bolts Tensile Properties at Elevated Temperatures
SAF 2205 Hex Nuts Stress Corrosion Cracking Resistance
Applications of Duplex 2205 Threaded Rod
Surface Finishes Of Duplex Stainless Steel Bolts
2205 Duplex Stainless Fasteners Equivalent
Duplex Fasteners Chemical Composition
Duplex 2205 Fasteners Mechanical Properties
UNS S32205 Fasteners Physical Properties
Types Of Duplex Bolts
Types Of Duplex Nuts
Types Of Duplex Screws
Types Of Duplex Stud Bolts
Types Of Duplex Washer

Supplied in April 23, 2025

Braskem

M8, Duplex Stud Bolts (500 QTY)
São Paulo, Brazil
Delivery Time = 45-60 Day

Sasol

M10, Duplex Hex Bolt (1200 QTY)
Johannesburg, South Africa
Delivery Time = 25-30

BASF

M4, Duplex Lug Nuts (100 QTY)
Ludwigshafen, Germany

Shell

M16, Duplex Wood Screws (1000 QTY)
London, United Kingdom (UK)

List Of Important Documents to Import Duplex Bolt and Nut in Al Jubail (Saudi Arabia)

Commercial Invoice
Origin Certificate
Export License
Quality Certificate
Import License
Test Report
Inspection Certification
Bill of Exchange
Marking Documents
Shipping Bill

Duplex Fasteners Specifications

Size In Ready Stock

Duplex Bolt Size = M1.2 To M48
Duplex Studs Size = M4 To M100
Duplex Nut Size = M2 To M80
Duplex Washer Size = M2 To M24

Duplex Bolts Head Type

Flat head
Round head
Button head
Hex head
Truss head

Duplex Steel Bolts Neck Type

Square Neck
Knurled Neck
Hex Neck
Triangular Neck

Threads of Duplex Stainless Bolts

CBSF
BSW
UN
UNF

Duplex Bolts & Nuts Head Drive

Phillips
Phillips/Slot
Six-Lobe
Slotted

Ends Types of Duplex Stainless Steel Bolts

Chamfered
Rounded
Sheared
Flat or Saw cut

Duplex 2205 Threaded Rod

Threads : Left and Right Hand, Both Side
Condition : Threading & Cold Drawn

Duplex Stud Bolts

Threads : Fully or Fine Threaded, Double End
End Types : Rounded, and Flat, Saw Cut

Duplex Screw

Head Shape : Button, Round, Pan
Threads Pitch : Fine and Coarse

Duplex Washer

Thickness : 0.002" to ½"
Forms : A, D, C, G, B, E

Manufacturing Process

Cold forging
Hot forging
CNC Machine

Advantages

High Strength
Excellent Corrosion Resistance
Good Weldability

Demanded Testing

Tensile Test
Impact Test
Hardness Testing

Uses

Offshore oil and gas
Desalination Plants
Chemical Processing

Packaging Types

Carton Box
Custom
Wooden Cases

Raw Material Origin

European
German
Janpanese

UNS S32205 Threaded Rod Supplier for Marine Application in Mumbai

Duplex 2205 fasteners are not ideal for harsh chemical environments. We can make common and custom size 2205 bolts. Usually, We require a minimum quantity of 50 pieces, depending on the duplex stainless bolts size and type. Rich background in the industry as a duplex fasteners manufacturer in India, 11 years of professional experience.

Duplex 2205 Fasteners Price List

Price in US Dollar ($)

Hex Screw
Full Thread

DIN 933
Duplex 2205

Diameter	M6	M8	M10	M12	M14	M16	M20	M22	M24	M27	M30
Length	-	-	-	-	-	-	-	-	-	-	-
20 MM	0.62		-	-	-	-	-	-	-	-	-
25MM	0.69	0.76	-	-	-	-	-	-	-	-	-
30MM	0.77	0.85	0.99	1.09	1.16	1.39	-	-	-	-	-
35MM	0.93	1.03	1.08	1.18	1.26	1.51	2.65	2.85	-	-	-
40MM	0.99	1.09	1.16	1.28	1.38	1.63	2.83	3.04	3.67	5.07	-
45MM	1.03	1.14	1.25	1.38	1.46	1.75	3.02	3.12	3.9	5.36	-
50MM	1.1	1.21	1.34	1.47	1.55	1.87	3.2	3.32	4.12	5.65	7.48
55MM	1.17	1.88	1.47	1.55	1.67	1.99	3.39	3.56	4.35	5.95	7.83
60MM	1.25	1.38	1.51	1.69	1.75	2.1	3.58	3.7	4.57	6.24	8.19
65MM	1.33	1.47	1.6	1.72	1.84	2.22	3.76	3.89	4.8	6.53	8.55
70MM	1.41	1.55	1.71	1.76	1.95	2.34	3.95	4.08	5.02	6.83	8.91
75MM	-	1.64	1.82	1.81	2.06	2.46	4.14	4.27	5.24	7.12	9.26
80MM	-	1.73	1.87	1.92	2.14	2.58	4.32	4.46	5.47	7.42	9.62
85MM	-	1.81	1.95	1.99	2.26	2.7	4.51	4.65	5.69	7.71	9.98
90MM	-	1.9	2.04	2.08	2.33	2.82	4.69	4.84	5.92	8	10.34
100MM	-	2.08	2.14	2.26	2.54	3.06	5.07	5.22	6.37	8.59	11.05
110MM	-	-	2.26	2.44	2.77	3.3	5.14	5.6	6.82	9.18	11.77
120MM	-	-	2.42	2.62	2.93	3.54	5.44	5.98	7.27	9.77	12.48
130MM	-	-	2.59	2.8	3.13	3.78	5.79	6.36	7.72	10.35	13.2
140MM	-	-	2.75	2.98	3.36	4.02	6.15	6.54	8.17	10.94	13.91
150MM	-	-	2.92	3.16	3.57	4.26	6.54	7.02	8.61	11.53	14.63
160MM	-	-	3.08	3.34	3.72	4.52	6.89	7.4	9.06	12.25	15.34
170MM	-	-	3.25	3.52	3.95	4.74	7.25	7.78	9.51	12.7	16.06
180MM	-	-	3.42	3.7	4.12	4.98	7.6	8.26	9.96	13.29	16.77
190MM	-	-	3.58	3.88	4.36	5.22	7.79	8.64	10.41	13.88	17.49
200MM	-	-	3.75	4	4.56	5.48	8.03	9.02	10.86	14.47	18.2

For Most Updated Duplex Hex Screws Price Email sales@dalloyedfasteners.com

Duplex Bolts Grade

UNS S31803 Fasteners

UNS S32205 Fasteners

Germany Standard for Duplex Steel Fasteners

Get The High Quality Alloy 2205 Hex Nuts and Duplex Bolts Used in High Temperature Environments

Duplex steel fasteners provide increased strength over standard stainless steel fasteners. The delivery time for Aaaaa is about Europe, Saudi Arabia, South Africa and Australia in 3 weeks by Air (CIF). Dalloyed Fasteners is a duplex fasteners manufacturer in India, Established in 2015 and based in Mumbai. We Get ISO : 2009 quality management certificate in year 2008.

Ideal Environment for Duplex Bolt and Nut

Corrosion Resistance of Alloy 2205 Stud Bolts

Sour Gas & Oil	Salt Spray	Acetic Acid	Sulfuric Acid	Humidity
Moderate	Excellent	Good	Moderate	Excellent
Sea Water	Sodium Hydroxide	Phosphoric Acid	Nitric Acid	-
Moderate	Moderate	Moderate	Good	-

Hardness for 2205 Duplex Hex Bolt

Hardness of duplex stainless steel bolts is 290 HB (Brinell) Maximum.

NDT Test Done for Duplex Stainless Steel Screws, Check Manufacturing Standard

Duplex hex bolt shows very good stress corrosion cracking resistance. Alloy 2205 threaded rod has low molybdenum and nickel contents. Due to the low alloying content, UNS S32205 bolts can be low in cost. American sourced raw material duplex fasteners manufacturer in India Since 11 Years, duplex stainless steel screws made from a high performance stainless steel.

American Standard for Duplex Stainless Steel Fasteners

Duplex Stainless Steel Nuts Heat Treatment

Heat Treatment	Temperature
Maximum Recommended Forming Temp.	600°F
Annealment Temp. (Minimum)	1900°F
Working Range	1750°F To 2250°F

ASTM A276 Type 2205 Fasteners Temperature Range

570°F

299°C

Duplex Bolts Torque

Diameter	Threads/in	Torque in Lubricated
1/4"	20 - 28	4.8 - 5.5 ft-lb
5/16"	18 - 24	10.0 - 11.0 ft-lb
3/8"	16 - 24	17.7 - 19.9 ft-lb
7/16"	14 - 20	28.2 - 31.5 ft-lb
1/2"	13 - 20	43.0 - 48.5 ft-lb
9/16"	12 - 18	62.1 - 69.2 ft-lb
5/8"	11 - 18	85.7 - 97.0 ft-lb
3/4"	10 - 16	152 - 170 ft-lb
7/8"	9 - 14	245 - 270 ft-lb
1"	8 - 14	368 - 412 ft-lb
1-1/4"	7 - 12	639 - 708 ft-lb
1-1/2"	6 - 12	1112 - 1252 ft-lb

Duplex fasteners have good weldability and excellent thermal conductivity. duplex 2205 bolt are made with a high amount of nickel and chromium. Dalloyed Fasteners is one of the well known duplex fasteners manufacturer in India.

Top 8 Advantages of Duplex Fasteners

2205 Bolts Tensile Properties at Elevated Temperatures

Temperature	122 °F	212 °F	392 °F	572 °F
Tensile Strength	96 ksi	90 ksi	83 ksi	81 ksi

SAF 2205 Hex Nuts Stress Corrosion Cracking Resistance

Grade	Boiling	Boiling	Wick
Grade	25% NaCl	42% MgCl2	Test
Duplex 2205 Fasteners	Pass	Fail	Pass

Applications of Duplex 2205 Threaded Rod

Surface Finishes Of Duplex Stainless Steel Bolts

Mill Finish
Brushed Finish
Polished Finish

Electropolished Finish
Bright Zinc Plated
Passivated Finish

2205 Duplex Stainless Fasteners Equivalent

American (UNS)

UNS S32205

USA (Werkstoff No)

WNR 1.4462

European (ASTM)

A182 F51/ F60

England (BS)

318S13

Duplex Fasteners Chemical Composition

C (Carbon) = 0.03% (Maximum)
Si (Silicon) = 1.00% (Maximum)
Mn (Manganese) = 2.00 % (Maximum)
P (Phosphorus) = 0.03% (Maximum)

S (Sulfur) = 0.02%
Cr (Chromium) = 22.0 - 23.00 %
Ni (Nickel) = 4.50 - 6.50 %
N (Nitrogen) = 0.14 - 0.20%

Duplex 2205 Fasteners Mechanical Properties

Mechanical Properties	Duplex Fasteners
Tensile Strength	655 MPa
Yield Strength	450 MPa
Elongation at break	25% (minimum)

UNS S32205 Fasteners Physical Properties

Physical Properties	Duplex Fasteners
Melting Point	1350°C
Heat Capacity	8.7 BTU/lbm °F
Thermal Conductivity	27.6 (BTU/hr•ft °F
Electrical Resistivity	0.278 mW•in

Dalloyed Fasteners Provide 2205 Duplex Steel Washers in Flat, Spring Lock and Square Types

Duplex stud bolts has offers better ductility and toughness than stainless steel 304 fasteners. Duplex lug nuts used for high temperatures and extreme conditions. ADNOC Approved duplex fasteners manufacturer in India as per ASME B18 2.2 and ASME B18 2.1, Duplex wood screws used in applications where high corrosion resistance are needed.

Types Of Duplex Bolts