Our Advantages
Duplex bolt 2507 , 1.4410 , S32750 hex bolt,hex nut,stud bolt and flat washers are our core products.
We have advantages of price,quality and delivery time.
Our products are exported to Europe and Asia market with good reputation.
Our duplex fasteners are used in Water Treatment Plants , Chemical & Petrochemical Industry widely.
If you select us,you will enjoy the service by our more than 18 years experienced sales!
Professional service!
Good quality products!
Trustworthy factory!
Rich Project experience
Our Hastelloy C276 nuts are used in South Korea power plant in 2010!
Our Alloy 286 1.4980 &2.4952 Nimonic 80A nuts used in Netherlands GE Nuclear Power plant project in 2012!
Our SS321 & SS309S studs and nut are used in Vietnam Powerplant project in 2015!
Our Duplex2205 bolt and nut are used in India power plant on 2017!
Our Duplex2507 bolt and nut are used in Oman power plant on 2019!
Our Duplex2205 bolt and nut are used in Bangladesh power plant on 2020!
Our Duplex2507 bolt and nut are used in ISRAEL power plant cooling tower system on 2020!
Our Hastelloy C276 bolt nut and washer are used in India Energy Group power plant in 2023!
Our Duplex2507 bolt and nut are used in MEXICO power plant cooling tower system on 2024!
Our Hastelloy C276,C4,C22,G30,B3
Incoloy800/825/925/926
Inconel600/617/718/725
Monel400/k500
Duplex 2205 /2507
Fasteners are exported to Europe and Asia each month!
Product Parameters
1.4410 / S32750 / 2507 bolt
1. Standard: DIN931, DIN933, ISO4014, ISO4017, Asme B 18.2.1
2. Grade: 1.4410 / S32750 / 2507
3. Material: 1.4410 / S32750 / 2507
4. Colour: Bright
5. Package: Bulk in 25 kg carton, then in pallet
6. Delivery time: 15days
S32750 introduction
What material is Super duplex S32750?
Super Duplex 2507 ,UNS S32750, 1.4410, A182 F53
Alloy 1.4410 ( S32750 ) is a super duplex stainless steel supplied in the solution annealed condition. As a super duplex stainless steel, it combines the desirable aspects of both austenitic and ferritic grades. The higher chromium, molybdenum and nitrogen contents result in a Pitting Resistance Equivalent number (PREN) of >41, providing pitting and crevice corrosion resistance superior to austenitic and duplex stainless steels in almost all corrosive media, and a Critical Pitting Temperature exceeding 50°C.
Supplied in the annealed condition, it achieves yield strengths of 80ksi (550Mpa), greater than most austenitic and duplex stainless steel grades. It cannot be hardened by heat treatment but can be strengthened by cold working. It also exhibits a low coefficient of thermal expansion and higher heat conductivity than austenitic steels and is suitable for working temperatures up to 300°C. Alloy 32750 is listed in NACE MR 0175 for sour service and having gained ASME Approval for Pressure Vessel applications it can be used in a wide variety of applications.
Key Features of S32750
- Very high strength
- Very good resistance to pitting and crevice corrosion
- Excellent resistance to chloride stress corrosion cracking
- Good workability and weldability
UNS S32750 Chemical Composition
| Alloy |
% |
Ni |
Cr |
Mo |
N |
C |
Mn |
Si |
S |
P |
Cu |
| 2507 |
Min. |
6.0 |
24 |
3.0 |
0.24 |
0.08 |
|
|
|
|
|
| Max. |
8.0 |
26 |
5.0 |
0.32 |
0.03 |
1.2 |
0.08 |
0.02 |
0.035 |
0.5 |
UNS S32750 material properties
| |
Yield strength Rp0.2,
MPa |
Tensile strength Rm,
MPa |
Elongation
[%] |
Hardness
[HB] |
Impact, Charpy-V, -46ºC
[J] |
Pren |
| BAR |
≥ 550 |
≥ 750 |
≥ 25 |
≤ 310 |
≥ 45 |
≥ 40 |
What is the difference between UNS S32750 and S32760?
The chemical composition of S32750 and S32760 are similar; however, the latter contains slightly more copper and tungsten. The copper content (min. 0.5, max 1.0) permits excellent resistance to corrosion in many nonoxidizing and mineral acids like hydrochloric and sulfuric acid.
What is SDSS material?
Super duplex stainless steel (SDSS) is a candidate material for production tubing in oil and gas wells and subsea pipelines used to transport corrosive hydrocarbon fluids. The suitability of this material for high temperature applications is examined in this paper.
Applications of S32750
Offshore & marine | Offshore platforms and equipment; components for gas, oil and process cooling plants; wellhead and subsea wellhead fittings; desalination plants, seawater cooled heat exchangers and high strength fasteners
Detailed Photos
Audited Supplier 
){kind=link}