Why Marine & Chemical Buyers Choose Ganpat Industrial For Duplex Steel Screw?
Chloride Pitting Resistance
S32205 duplex and S32750 / S32760 super duplex, PREN above 40 in super duplex
Roughly 2× Yield Strength
Higher proof strength than standard austenitic stainless screws
Four Grades, One Enquiry
S31803 • S32205 • S32750 • S32760
MTC Certified
ISO 9001:2015 • PED • Petrofac Approved
Fast Quote
Send size, head type & quantity – get a price fast
Duplex Steel Screw Summary
- 1Type: Pan, CSK, Cheese, Round, Phillips & Slotted Machine Screws
- 2Size Range: M1.6 to M64 • Custom on drawing
- 3Grades: UNS S31803, S32205, S32750, S32760
- 4Standards: ISO 7045, ISO 1207, ISO 7046, ISO 2009, ASME B18.6.3
- 5Finish: Passivated, Pickled, Self-Colour, Polished
Ganpat Industrial is a trusted Duplex Steel Screw Supplier in India. We offer high-strength screws in Duplex 2205 and Super Duplex grades. Our screws come in various sizes, threads, and head styles. They meet relevant ASTM and ASME standards for industrial applications. These screws provide excellent corrosion resistance and long-lasting durability. We serve customers across India, UAE, and wider Middle East.
Mumbai · Duplex & Super Duplex Screws
Precision Engineered, Performance Driven.
Ganpat Industrial supplies Duplex Steel Screw for reliable, long-lasting performance in demanding industrial environments.
- ✓Long Service Life
- ✓High Corrosion Resistance
- ✓Superior Strength
- ✓Petrofac Approved
Chloride Pitting-Resistant DS Machine Screws Supplier in India With Competitive Price List
Duplex Steel Screw Specification
Duplex Pan Head Screw Grades
- UNS S31803 • UNS S32205
- EN 1.4462 • SAF 2205
- ASTM A182 F51 / F60
Super Duplex Machine Screw Grades
- UNS S32750 • EN 1.4410
- UNS S32760 • EN 1.4501
- ASTM A182 F53 / F55
Duplex Steel CSK Phillips Screw Size Range
- Thread: M1.6 to M64
- Standard chart: M2 to M10
- Custom sizes on drawing
Super Duplex Steel Machine Screws Dimensional Standards
- ISO 7045 / DIN 7985
- ISO 1207 / DIN 84
- ISO 7046 / DIN 965 • ISO 2009 / DIN 963
- ASME B18.6.3
SDS Machine Screw Thread Series
- Metric coarse • Metric fine
- UNC • UNF
- ISO 261 / ISO 965 tolerance
Super Duplex Steel Cheese Head Slotted Screw Testing
- Ultrasonic Test
- PMI Test
- Dimensional Inspection
Size Chart of Duplex Pan Head Screw
Duplex Steel Screw Size starts at M1.6 and goes up to M64. Standard-chart sizes below.
| Thread Size | Coarse Pitch | Head Dia. (dk max) | Cross Recess No. |
|---|---|---|---|
| M2 | 0.4 | 4 | 1 |
| M3 | 0.5 | 6 | 1 |
| M4 | 0.7 | 8 | 2 |
| M5 | 0.8 | 10 | 2 |
| M6 | 1.0 | 12 | 3 |
| M8 | 1.25 | 16 | 4 |
| M10 | 1.5 | 20 | 4 |
Duplex Machine Screws Heat Treatment Process
As a Duplex Steel Screw Manufacturer in India, we follow a controlled anneal-and-quench route.
Bar & MTC Check
Grade and heat verified before work starts
Head & Thread Forming
Formed or machined to the drawing
Solution Anneal
2205: 1020–1100°C, held long enough to dissolve intermetallics
Rapid Water Quench
Fast cooling prevents sigma phase
Pickle & Passivate
Restores the chromium oxide film
Inspect & Pack
PMI and dimensional check before dispatch
Different Types of Duplex Stainless Steel Screws
Pick your head style and drive. Every type is available in duplex and super duplex.
Duplex Pan Head Screw
DIN 7985 / ISO 7045
DS CSK Head Screws
DIN 963 / ISO 2009
Duplex Stainless Steel Cheese Head Slotted Screw
DIN 84 / ISO 1207
Duplex Steel CSK Phillips Screw
DIN 965 / ISO 7046
Super Duplex Steel Round Head Slotted Screws
ASME B18.6.3
Super Duplex Steel Cheese Head Slotted Screw
DIN 84 / ISO 1207
Duplex Machine Screws
S31803 / S32205
SDS Machine Screw
S32750 / S32760
Monthly Delivery of Super Duplex Machine Screw To Below Countries
| Export to | Countries | Continent | Shipping Time |
|---|---|---|---|
|
UAE | Asia | 11-50 Days |
|
USA | North America | 30-45 Days |
|
Italy | Europe | 20-54 Days |
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Surface Finish Options of Super Duplex Steel Cheese Head Slotted Screw
Choose the finish that suits your chloride exposure.
ASTM A967
Passivated
Restores the protective chromium oxide film
Scale Removed
Pickled
Clean surface after heat treatment
Self-Colour
Natural Finish
Plain finish, no added coating
Polished
Bright Surface
For visible or hygienic assemblies
Chemical Composition of DS CSK Head Screws
| Grade | Cr | Ni | Mo | N |
|---|---|---|---|---|
| UNS S31803 | 21.0–23.0 | 4.5–6.5 | 2.5–3.5 | 0.08–0.20 |
| UNS S32750 | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | 0.24–0.32 |
| UNS S32760 | 24.0–26.0 | 6.0–8.0 | 3.0–4.0 | 0.20–0.30 |
Mechanical Properties of Duplex Machine Screws
Tensile Strength
655 MPa Min
S32205 • S31803: 620
Yield Strength
450 MPa Min
0.2% Offset
Elongation
25% Min
Ductile
Hardness
≤ 290 HB
Bar, Annealed
Duplex Steel CSK Phillips Screw Material Equivalent
American Standard
- UNS S31803 / S32205 (2205)
- UNS S32750 / S32760
- ASTM A276 • A479 • A182 F51/F60/F53/F55
European Standard
- EN 1.4462 (X2CrNiMoN22-5-3)
- EN 1.4410 • EN 1.4501
- EN 10088-3 bar
Japanese Standard
- SUS 329J3L (2205)
- Swedish SS 2377
- Trade names: SAF 2205, SAF 2507, Zeron 100
Welding Methods For Super Duplex Steel Round Head Slotted Screws
Weld duplex the right way and keep the phase balance intact.
Common Arc Processes
SMAW, GMAW, GTAW, FCAW, SAW and PAW; gas welding is not used
Process
Matching Filler Metal
E2209 / ER2209 for 2205; 2594-type for super duplex
Filler
Interpass Temperature
Keep at or below 150°C (300°F)
≤ 150°C
No Preheat
Preheating slows cooling and invites intermetallics
Preheat
Post-Weld Heat Treatment
Generally not needed for 2205; if done, 1040°C minimum with rapid cooling
PWHT
Thread Types of Duplex Stainless Steel Cheese Head Slotted Screw
Available in various thread configurations to suit different applications.
Fully Threaded
Full Length
Threads along the complete shank
Partially Threaded
Partial Length
Unthreaded section below the head
Coarse Thread
Standard Pitch
Suitable for general applications
Fine Thread
Fine Pitch
For applications requiring finer engagement
Super Duplex Machine Screw Export Packaging
Poly Bag Or Small Box
Counted quantity per bag, kept apart by size
Inner Carton
Cushioned to protect threads and heads
Wooden Case Or Pallet
For bulk and container shipments
Marking & Labelling
Grade, size, standard and heat number as required
Weight Chart of DS CSK Head Screws
| Thread Size | 12 mm | 20 mm | 30 mm |
|---|---|---|---|
| M3 | 0.954 | 1.27 | 1.71 |
| M4 | 1.94 | 2.56 | 3.44 |
| M5 | 3.41 | 4.41 | 5.70 |
| M8 | 11.5 | 14.2 | 17.5 |
| M10 | 21.2 | 25.2 | 30.2 |
Buying In Bulk For An Offshore Or Chemical Project?Send your BOQ – price and dispatch details quickly.
Get Duplex Steel Pan Head, CSK & Cheese Head Screws With Superior Strength & Crevice Corrosion Resistance For Marine And Oil & Gas Applications
Applications of Duplex Steel Screw
Find Duplex Steel Screw Supplier in India providing diverse applications for chloride-heavy service.
Marine & Offshore
Oil & Gas Industry
Chemical Processing
Desalination Plants
Pulp & Paper Digesters
Flue Gas Scrubbing
Biofuel Plants
Power Generation
Testing Methods of SDS Machine Screw
PMI Testing
Alloy check on every heat
Tensile & Yield
Against grade minimums
Hardness Test
Brinell / Rockwell as required
Ferrite & Microstructure
Confirms duplex phase balance, sigma-free
Dimension & Thread Gauge
Head, length and 6g thread check
Impact Test
Charpy on request for super duplex
Weekly Delivery of Duplex Stainless Steel Screws To Below Countries
| Export to | Continent | Port | Shipping time |
|---|---|---|---|
Germany
|
Europe | Port of Rotterdam | 20-45 Days |
Malaysia
|
Asia | Port of Shanghai | 19-23 Days |
Spain
|
Europe | Port of Hamburg | 33-34 Days |
Frequently Asked Questions
What is the Duplex Steel Screw price?
Price varies by grade, size, finish and quantity. Contact us for a quote.
What DS CSK Head Screws sizes can you supply?
We supply standard and custom sizes as per requirement.
Do you stock Super Duplex Steel Machine Screws?
Yes, S32750 and S32760 are available on request.
Which documents come with the order for Duplex Steel CSK Phillips Screw?
MTC and inspection reports are available with the order.
Sales Agents In Following Locations
| Regions | Country |
|---|---|
| South Carolina | USA |
| East Asia | China, Japan, South Korea |
| North America | USA, Canada, Mexico |
| North Africa | Egypt, Morocco, Algeria |
| South America | Brazil, Argentina, Colombia |
| West Africa | Nigeria, Ghana, Senegal |
| East Africa | Kenya, Ethiopia, Tanzania |
| South Asia | India, Pakistan, Bangladesh |
| Melanesia | Fiji, Papua New Guinea |
| Middle East | Saudi Arabia, Iran, Iraq |
6 Reasons to choose Ganpat Industrial Corporation
- Distributor of Heat Exchanger parts and Alloys for High Temperature applications.
- Stockholder and importer of Ferrous and non ferrous metals.
- Wide stock of prime quality austenitic and Ferritic Stainless Steel for Extreme pressure environment.
- Marine grade steel at lowest price in Mumbai.
- Compare Price per KG in India and China.
- Offer Resale price to local suppliers, traders and wholesalers in UAE, Saudi Arabia, Egypt, and USA