Duplex Fasteners Manufacturer in India
Construction and engineering involve choosing fasteners carefully; their choice can have an enormous effect on durability and reliability of structures. Duplex steel fasteners stand out for their exceptional strength, corrosion resistance, and longevity – qualities made especially noticeable by Sachiya Steel International of India who specialize in duplex steel fasteners featuring top-of-the-line quality and reliability in every product they manufacture.
Understanding Duplex Steel Fasteners
Duplex steel fasteners are widely admired for their dual-phase microstructure, which blends together the best attributes of austenitic and ferritic stainless steels to produce fasteners with exceptional strengths, corrosion resistance, stress corrosion cracking and pitting resistance, as well as exceptional strength. Due to this innovative construction method, duplex fasteners boast high strength levels while being extremely corrosion resistant as well.
Duplex Fasteners Specification
Specifications for Duplex Fasteners are mentioned below. If any of the specifications are not mentioned here, please contact us.
| Duplex Fasteners Material Specification | 2205 Duplex Bolts, UNS S31803 Bolts |
|---|---|
| Standard | DIN, UNI, ISO, JIS, GB, IS, BS, ASME, ANSI, ASTM, and all International Standards |
| Duplex Fasteners/ Bolts Size | M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M14, M16, M20, M24, M30, M36 to M160 |
| Length | 3 mm to 200 mm |
| Duplex Bolts, Studs Threads: | METRIC, BSW, BSF, UNC, UNF, or as required |
| Duplex Steel Fasteners Standard: | ANSI – American National Standards Institute
DIN: DIN 931, DIN 933, DIN 934, DIN 970 UTS – Unified Thread Standard: UNC, UNF, UNEF, UNS, NPT, NPTF ISO – International Organization for Standardization: ISO 4032, ISO 4033, JIS standards |
| Source of raw materials | Tata Steel, JSPL, RINL, Usha Martin, Dhamma Steel, Mukund Steel, etc. |
| SCOPE OF MANUFACTURE |
|
| Duplex Fasteners In Form of: | Hex, Square, Round, Threading as per Gauge Etc. |
| Head drive: | Phillips, Slotted, Phillips/Slot, Six-Lobe, etc |
| Duplex bolting Test Certificate: | Manufacturer Test Certificate as per EN 10204 / 3.1 |
| Duplex Fasteners finishing: | Zinc (yellow, white, blue, black), black oxide, Geometry, Dacroment, anodizing, nickel-plated, plated zinc-nickel, Duplex Steel: Passivated Self-Colour, Hot Dip Galvanised (HDG), Bright Zinc Plated (BZP), Sherardized, Duplex Steel, Mechanically Applied coating, and some special one like DACROMET |
| Production process | M2-M24: Cold Forging, hot forging M24-M100, machining, and CNC for Customized connecting element |
| Duplex bolting materials Surface Coating: |
All surface finishes offered including Geomet & PTFE, Galvanised, Zinc, Electroless Nickel, Sherardized, Dacromet |
| Popular Types of Duplex Steel Bolts | Hex Bolts, Flange Bolts, Hex Head Bolts, Lag Bolts, Square Bolts, Eye Bolts, U Bolts, T Bolts, Countersunk Bolts, etc. |
| Popular Types of Duplex Steel Nut | Eye, Dome, Hex Head Nut, Panel, Lock, Coupling, Square, Acorn, T, Wing, etc. |
| Popular Types of Duplex Steel Screw | Socket Set Fasteners, Anchor Fasteners, Blind Rivet, Threaded Fasteners, Socket Head Fasteners, Machine Fasteners, Concrete Fasteners, Shoulder Fasteners, Panel Fasteners, Hex Head Cap Fasteners, etc. |
| Popular Types of Duplex Steel Washer | Machine Washers, Star Washers, Flat Washer, Lock Washer, Split Washer, Sealing Washer, etc. |
| Duplex Fasteners Packing: | IN BULK: canton, pallet, Small Boxs / carton/pallet, or customer request |
Why choose Sachiya Steel International Duplex Steel Fasteners?
- Sachiya Steel International takes quality as a non-negotiable value, and each duplex steel fastener undergoes stringent quality controls and adheres to international standards to guarantee optimal performance and reliability.
- Sachiya Steel International offers an expansive selection of duplex steel fasteners to meet diverse industrial needs, such as bolts, nuts, screws and washers.
- Customization Options: Sachiya Steel International understands that every project has a distinct set of needs, which is why we offer customization services tailored to meet specific design and dimensional specifications, guaranteeing a perfect fit in each application.
- Sachiya Steel International offers premier duplex steel fasteners at competitive pricing, making their products available across a range of industries and businesses.
Duplex Steel Fasteners Manufacturing Process
Sachiya Steel International employs state-of-the-art manufacturing facilities and advanced techniques to produce duplex steel fasteners of superior quality. Each step from raw material selection through final finishing stages is carefully considered in order to guarantee consistency and ensure consistent quality across their product range.
Applications of Duplex Steel Fasteners
Duplex steel fasteners have proven indispensable across various industries, such as:
- Oil and Gas
- Petrochemical
- Chemical Processing
- Marine Engineering
- Construction
- Aerospace
Duplex Fasteners Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| Duplex S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
| Duplex S32205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.50 – 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
| Duplex S32750 | 0.030 max | 1.20 max | 0.80 max | 0.035 max | 0.020 max | 24.00 – 26.00 | 3.00 – 5.00 | 6.00 – 8.00 | 0.24 – 0.32 | 58.095 min |
| Duplex S32760 | 0.05 max | 1.00 max | 1.00 max | 0.030 max | 0.010 max | 24.00 – 26.00 | 3.00 – 4.00 | 6.00 – 8.00 | 0.20 – 0.30 | 57.61 min |
Duplex Fastener Mechanical Properties
| Element | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| S31803 / S32205 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
| S32750 / S32760 | 7.8 | 0.281 | 1350 | 2460 |
Equivalent Grades for Duplex Fasteners
| STANDARD | UNS | WNR. |
| Duplex 2205 | S31803 / S32205 | 1.4462 |
Size Chart for Duplex Fasteners
|
Fasteners Type
|
SIZE
|
GRADE
|
ASME
|
ISO
|
ASTM
|
|---|---|---|---|---|---|
|
Socket Head Cap Fasteners
|
M1.6 to M64
|
12.9
|
B18.3.1 M
|
4762
|
A574M
|
|
Socket Low Head Cap Fasteners
|
M4 to M20
|
10.9
|
|||
|
Socket Head Shoulder Fasteners
|
M6 to M24
|
012.9
|
B18.3.3M
|
||
|
Countersunk Socket Head Fasteners
|
M3 to M20
|
012.9
|
B18.3.5M
|
10642
|
F835M
|
|
Button Head Socket Fasteners
|
M3 to M12
|
012.9
|
B18.3.4M
|
7380
|
F835M
|
|
Flange Button Head Socket Fasteners
|
M3 to M10
|
012.9
|
F835M
|
||
|
Knurled Point Socket Set Fasteners
|
M3 to M20
|
45H
|
B18.3.6M
|
4029
|
F912M
|
|
Flat Point Socket Set Fasteners
|
M6 to M12
|
45H
|
B18.3.6M
|
4026
|
F912M
|
|
Dog Point Socket Set Fasteners
|
M3 to M20
|
45H
|
B18.3.6M
|
4028
|
F912M
|
|
Cone Point Socket Set Fasteners
|
M3 to M12
|
45H
|
B18.3.6M
|
4027
|
F912M
|
|
Plain Point Socket Set Fasteners
|
M3 to M20
|
45H
|
B18.3.6M
|
4029
|
F912M
|
|
Taper Pressure Plug
|
M8 to M22
|
–
|
|
Duplex Fasteners Type
|
SIZE
|
PROPERTY CLASS
|
TENSILE STRENGTH
|
STANDARD
|
|---|---|---|---|---|
|
Duplex Hex Head Fasteners
|
M4 to M80
|
10.9
|
1040N / mm2 min
|
ISO 4017 (Full Thread)
ISO 4014 (Half Thread) |
|
Duplex Nuts Type
|
SIZE
|
PROPERTY CLASS
|
STANDARD
|
|---|---|---|---|
|
Duplex Hex Nut
|
M6 to M42
|
10
|
ISO 4032
|
|
Duplex Nylock Nut
|
M6 to M20 (Gr.8)
M10 to M24 (Gr.10) |
8 & `10
|
DIN 982
|
|
Duplex Nylock Nut
|
M6 to M20 (Gr.8)
M10 to M24 (Gr.10) |
8 & 10
|
DIN 985
|
|
Duplex Hex Weld Nut
|
M6 to M12
|
8
|
DIN 929
|
|
Duplex Washers Type
|
SIZE
|
HARDNESS
|
STANDARD
|
|---|---|---|---|
|
Square Section Spring Washer, Duplex
|
3mm to 39mm
|
HV (430 to 530)
|
DIN 7980
|
|
Flat Section Spring Washer, Duplex
|
3mm to 39mm
|
HV (430 to 530)
|
DIN 127 B
|
|
Hardened Washer, Duplex
|
12mm to 30mm
|
HV (300 to 370)
|
IS 2016
|
|
Hardened Steel Washer, Duplex
|
12mm to 56mm
|
Rockwell 26 to 45 (HDG)
Rockwell 38 to 45 (Coated) |
ASTM F436M
|
Dimensions Chart for Duplex Fasteners
|
Bolt Size
|
USS
|
SAE
|
||||
|
OD (in.)
|
ID (in.)
|
Thickness
|
OD (in.)
|
ID (in.)
|
Thickness
|
|
|
1/8 (#6)
|
–
|
–
|
–
|
0.375
|
0.156
|
.036/.065
|
|
5/32 (#8)
|
–
|
–
|
–
|
0.438
|
0.188
|
.036/.065
|
|
3/16 (#10)
|
0.560
|
0.250
|
.036/.065
|
0.500
|
0.220
|
.036/.065
|
|
7/32 (#12)
|
–
|
–
|
–
|
0.562
|
0.250
|
.051/.080
|
|
1/4 (#14)
|
0.734
|
0.312
|
.051/.080
|
0.625
|
0.281
|
.051/.080
|
|
5/16
|
0.875
|
0.375
|
.064/.104
|
0.688
|
0.344
|
.051/.080
|
|
3/8
|
1.000
|
0.438
|
.064/.104
|
0.812
|
0.406
|
.051/.080
|
|
7/16
|
1.250
|
0.500
|
.064/.104
|
0.922
|
0.469
|
.051/.080
|
|
1/2
|
1.375
|
0.562
|
.086/.132
|
1.062
|
0.531
|
.074/.121
|
|
9/16
|
1.469
|
0.625
|
.086/.132
|
1.156
|
0.594
|
.074/.121
|
|
5/8
|
1.750
|
0.688
|
.108/.160
|
1.312
|
0.656
|
.074/.121
|
|
3/4
|
2.000
|
0.812
|
.122/.177
|
1.469
|
0.812
|
.108/.160
|
|
7/8
|
2.250
|
0.938
|
.136/.192
|
1.750
|
0.938
|
.108/.160
|
|
1
|
2.500
|
1.062
|
.136/.192
|
2.000
|
1.062
|
.108/.160
|
|
1 1/8
|
2.750
|
1.250
|
.136/.192
|
2.250
|
1.250
|
.108/.160
|
|
1 1/4
|
3.000
|
1.375
|
.136/.192
|
2.500
|
1.375
|
.136/.192
|
|
1 3/8
|
3.250
|
1.500
|
.153/.213
|
2.750
|
1.500
|
.136/.213
|
|
1 1/2
|
3.500
|
1.625
|
.153/.213
|
3.000
|
1.625
|
.153/.213
|
|
1 5/8
|
3.750
|
1.750
|
.153/.213
|
–
|
–
|
–
|
|
1 3/4
|
4.000
|
1.875
|
.153/.213
|
–
|
–
|
–
|
|
1 7/8
|
4.250
|
2.000
|
.153/.213
|
–
|
–
|
–
|
|
2
|
4.500
|
2.125
|
.153/.213
|
–
|
–
|
–
|
|
2 1/4
|
4.750
|
2.375
|
.320/.248
|
–
|
–
|
–
|
|
2 1/2
|
5.000
|
2.625
|
.210/.280
|
–
|
–
|
–
|
|
2 3/4
|
5.250
|
2.875
|
.228/.410S
|
–
|
–
|
–
|
|
3
|
5.500
|
3.125
|
.249/.327
|
–
|
–
|
–
|