Super Duplex Steel UNS S32750 Nuts, UNS S32750 Super Duplex Steel Nuts Supplier & Exporter

GENERAL PROPERTIES:-

Duplex 2507 (UNS S32750) is a super duplex stainless steel with 25% chromium, 4% molybdenum, and 7% nickel designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity, and a low coefficient of thermal expansion. The high chromium, molybdenum, and nitrogen levels provide excellent resistance to pitting, crevice, and general corrosion.

APPLICATION:-

• Oil and gas industry equipment
• Offshore platforms, heat exchangers, process and service water systems, fire-fighting systems, injection and ballast water systems
• Chemical process industries, heat exchangers, vessels, and piping
• Desalination plants, high pressure RO-plant and seawater piping
• Mechanical and structural components, high strength, corrosion-resistant parts
• Power industry FGD systems, utility and industrial scrubber systems, absorber towers, ducting, and piping

COROSSION RESISTANCE:

GENERAL COROSSION:-

• high chromium and molybdenum content of 2507 makes it extremely resistant to uniform corrosion by organic acids like formic and acetic acid.
• provides excellent resistance to inorganic acids, especially those containing chlorides.
•  can be used in dilute hydrochloric acid.
• Pitting need not be a risk in the zone below the borderline in this figure, but crevices must be avoided.

INTERGRANURAL COROSSION:-

• Low carbon content greatly lowers the risk of carbide precipitation at the grain boundaries during heat treatment.
• Is highly resistant to carbide-related intergranular corrosion.

STRESS COROSSION CRACKING:-

• Duplex structure of 2507 provides excellent resistance to chloride stress corrosion cracking (SCC).
• Superior to 2205 in corrosion resistance and strength.
• 2507 is especially useful in offshore oil and gas applications and in wells with either naturally high brine levels or where brine has been injected to enhance recovery.

PITTING COROSSION:-

• Different testing methods can be used to establish the pitting resistance of steels in chloride-containing solutions.

CREVICE COROSSION:-

• Highly resistant to crevice corrosion.

PROCESSING

HOT FORMING:-

2507 should be hot worked between 1875°F and 2250°F. This should be followed by a solution anneal at 1925°F minimum and a rapid air or water quench.

COLD FORMING:-

Most of the common stainless steel forming methods can be used for cold working 2507. The alloy has a higher yield strength and lower ductility than the austenitic steels so fabricators may find that higher forming forces, increased radius of bending, and increased allowance for springback are necessary. Deep drawing, stretch forming, and similar processes are more difficult to perform on 2507 than on an austenitic stainless steel. When forming requires more than 10% cold deformation, a solution anneal and quench are recommended.

HEAT TREATMENT:-

2507 should be solution annealed and quenched after either hot or cold forming. Solution annealing should be done at a minimum of 1925°F. Annealing should be followed immediately by a rapid air or water quench. To obtain maximum corrosion resistance, heat treated products should be pickled and rinsed.

WELDING:-

2507 possesses good weldability and can be joined to itself or other materials by shielded metal arc welding (SMAW), gas tungsten arc welding (GTAW), plasma arc welding (PAW), flux cored wire (FCW), or submerged arc welding (SAW). 2507/P100 filler metal is suggested when welding 2507 because it will produce the appropriate duplex weld structure.

Preheating of 2507 is not necessary except to prevent condensation on cold metal. The interpass weld temperature should not exceed 300°F or the weld integrity can be adversely affected. The root should be shielded with argon or 90% N2/10% H2 purging gas for maximum corrosion resistance. The latter provides better corrosion resistance.

CHEMICAL PROPERTIES:

Typical values (Weight %)

C	Cr	Ni	Mo	N	Others
0.020	25	7	4.0	.27	S=0.001

MECHANICAL PROPERTIES:

Ultimate Tensile Strength, ksi	116 min.
0.2% Offset Yield Strength 0.2%, ksi	80 min.
0.1% Offset Yield Strength 0.2%, ksi	91 min.
Elongation in 2 inches, %	15 min.
Hardness Rockwell C	32 max.
Impact Energy, ft.-lbs.	74 min.

PHYSICAL PROPERTIES:

Density	lb/in3	0.28
Modulus of Elasticity	psi x 106	29
Coefficient of Thermal Expansion 68-212°F/°F	x10-6/°F	7.2
Thermal Conductivity	Btu/h ft °F	8.7
Heat Capacity	Btu/lb/°F	0.12
Electrical Resistivity	W-in x 10-6	31.5

STAINLESS STEEL:

Grades 18-8, 303, 304, 304L, 316, 316L, 309, 310, 317L, 321, 330, 347, 410, 420, 430, 17-7PH

BOLTS AND SCREWS:-

ANSI/ASME B18.2.1, B18.3, B18.5, B18.6.2 ASTM A193, A320, F593, F837, F879, F880
HEX HEAD CAP SCREWS, HEAVY HEX BOLTS, T-HEAD BOLTS, LAG SCREWS
CARRIAGE BOLTS, ELEVATOR BOLTS, WEDGE ANCHOR BOLTS
SOCKET SCREWS: SOCKET CAP, FLAT AND BUTTON HEAD, SHOULDER SCREWS, SET SCREWS

MACHINE AND TAPPING SCREWS:-

ANSI/ASME B18.6.1, B18.6.3, B18.6.4
MACHINE, SHEET METAL, THREAD CUTTING, SELF-DRILLING

NUTS:-

ANSI/ASME B18.2.2, B18.17, ASTM A194, F594, IFI 128
JAM, FINISHED, HEAVY, COUPLING, WING, NYLON INSERT, SERRATED FLANGE,
SLOTTED (CASTLE), ACORN (CAP), KEPS

WASHERS:-

ANSI/ASME B18.21.1, B18.22.1, B18.23.1 FLAT, LOCK, BEVELED, EXTERNAL AND INTERNAL TOOTH, COMPRESSION, SAE

THREADED ROD:-

ASTM A193, A320, F593, IFI 136
3-6-12 FOOT LENGTHS
STUDS: GENERAL PURPOSE, STUD BOLTS, DOUBLE END, SINGLE END

TURNBUCKLES

BENT BOLTS AND EYE BOLTS

ANSI/ASME B18.15, IFI 136
J-BOLTS, HOOK BOLTS, CLOSED AND OPEN EYE BOLTS, FORGED EYE BOLTS

HINGES, NAILS, PINS AND CHAINS

PIPE SUPPORTS, CLAMPS AND STRAPS MSS-SP58, SP69, FIGURE 137
U-BOLTS, CLEVIS HANGERS, RISER CLAMPS, BEAM CLAMPS, 3-BOLT CLAMPS, SHORT STRAPS

Titanium
Grade	Common Name	Related Specification
		British	European	ASTM	UNS
Grade1			3.7025	B348	R50250
Grade2			3.7035	B348	R50400
Grade3			3.7055	B348	R50550
Grade5			3.7165	B345	R56400
Grade7			3.7235	B348	R52400
Grade11			3.2250	B348	R52250

Titanium fasteners are among the most commonly manufactured at Harsh Steel. Often known for its light weight, titanium also possesses excellent mechanical properties, able to resist hostile environments, and is used commonly in offshore engineering projects.

Duplex
Alloy	Common Name	Related Specifications
		European	UNS	ASTM/ASME
Alloy 2205	SAF 2205 ®	1.4462	S32205	F60
31803	31803	1.4462	S31803	F51

Harsh Steel produces duplex fasteners in all grades of duplex, to customer specification. Duplex grades are a mixed microstructure of Austenite and Ferrite, combining the properties of both (hence the name DUPLEX). Duplex stainless steels have high corrosion resistance as well as a high strength. Mechanical properties are around double that of a typical austenitic grade such as 316. They would also normally offer higher stress cracking resistance in Chloride solutions for example. They are composed typically of 22% Chromium, 5 % nickel. Having worked with duplex since its outset, the duplex bolting continues to account for a core part of our business, along with Super duplex.

Super Duplex
Alloy	Common Name	Related Specification
		European	UNS	ASTM/ASME
Alloy 255	Ferralium 255 ®	1.4507	S32550	F61
Zeron 100	Zeron 100 ®	1.4501	S32760	F55
Alloy 2507	SAF 2507 ®	1.4410	S32750	F53

We are proud that Harsh Steel is the world’s number one bespoke producer of Super Duplex bolting. Super Duplex stainless steel grades are similar to standard duplex, but they contain a higher content of Chromium, thus enhancing the corrosion resistance and mechanical properties. Harsh Steel produces fasteners in all three types of Super Duplex.

Stainless Steels / Others
Grade	Related Specification
	British	European	ASTM	UNS
304/304L	BS 970	1.4301/1.4306	A193 B8, A320 B8	S 30400 / S30403
310	BS 970	1.4841	A479	S 31000 S 31008
310S	BS 970	1.4845		S 31008
316/316L	BS 970	1.4401	A193 B8M, A320 B8M	S 31600 / S31603
317/317L	BS 970	1.4449/1.4438		S 31700 / S31703
321	BS 970	1.4541	A193 B8T	S 32100
347	BS 970	1.4550	A193 B8C, A320 B8C	S 34700
410	BS 970	1.4006		S 41000
431	BS 970	1.4057		S 43100
174PH		1.4562		S 14700
660 A/B/C/D		1.4980	A453	K 66286
254 SMO ®		1.4547		S 31254
C63000			B150	C63000
904L		1.4539		N08904
Zirconium 702				R60702
Zirconium 705				R60705

Harsh Steel started off producing Stainless Steel bolting in its formative years, and although the company has since diversified into more exotic materials, we continue to offer Stainless Steels and they continue to be an important part of our business, especially if customers require non-standard bolting: i.e. non-standard sizes, special specification, or otherwise difficult to find. We offer all grades of stainless steels, be it Austenitic, Ferritic or Martensitic.

High Nickel Alloys
Alloy	Common Name	Related Specification
		British	European	ASTM	UNS
Alloy 600	Inconel 600 ®	BS 3076 NA 14	2.4816	B166	N06600
Alloy 601	Inconel 601 ®		2.4627	B166	N06601
Alloy 625	Inconel 625 ®	BS 3076 NA 21	2.4856	B446	N06625
Alloy 718	Inconel 718 ®		1.4668	B637	N07718
Alloy 750	Inconel 750 ®		2.4669	B637	N07750
Alloy 400	Monel 400 ®	BS 3076 NA13	2.4360	F467	N04400
Alloy K500	Monel K500 ®	BS 3076 NA18	4.4375	B865-04	N05500
Alloy C276	Hastelloy C276 ®		2.4819	B574	N10276
Alloy 22	Hastelloy C22 ®		2.4602	B574	N06022
Alloy B2	Hastelloy B2 ®			B335	N10665
Alloy X	Hastelloy X ®		2.4655	B572	N06002
Alloy B3	Hastelloy B3 ®		2.4600	B335	N10675
Alloy G30	Hastelloy G30 ®		2.4603	B581	N06030
Alloy 50	Nitronic 50 ®			A479 XM-19	S20910
Alloy 60	Nitronic 60 ®			A193 B8S	S21800
Alloy 75	Nimonic 75 ®		2.4951	B637	N06075
Alloy 80A	Nimonic 80A ®	BS 4882 NA20	2.4952	B637	N07080
Alloy 90	Nimonic 90 ®			B408	N07090
Alloy 800	Incoloy 800 ®	BS 3076 NA15	1.4876	B408	N08800
Alloy 800H	Incoloy 800H ®			B408
Alloy 800 HT	Incoloy 800HT ®		1.4959	B408	N08811
Alloy 825	Incoloy 825 ®	BS 3076 NA16	2.4858	B425	N08825
Alloy 925	Incoloy 925 ®			B805	N09925
Alloy DS	Incoloy DS ®	BS 3076 NA17	1.4862		N08330

Harsh Steel’s substantial experience in working with high nickel alloys bolting is crucial as they are extremely difficult materials to machine and can require various forms of additional treatment to ensure full conformity. Related by their high percentage of nickel in their composition, these highly corrosion-resistant materials are widely used in the petrochemical and offshore sector, and are often better known by their registered trade names (e.g. Inconel®, Hastelloy®, Monel® and Nimonic®).

INCONEL  BOLTS

We produce inconel fasteners in several grades. Inconels are austenitic nickel-chromium superalloys. They are used in extreme environments, often in gas turbines, nuclear reactors and natural gas processing plants.

HASTELLOY BOLTS

Hastelloy bolts & nuts can be most effective under high temperatures and corrosive environments, with high stress resistance.

MONEL  BOlTING

HARSH STEEL manufactures Monel fasteners in A400 and K500. Monel grades are nickel-copper based alloys and have high corrosion resistance and strength properties. They are often used in valves, pumps and heat exchangers.

INCOLOY  BOLTS

HARSH STEEL produces various grades of Incoloy bolts & nuts. Another of the superalloys, it is used in extreme environments.

NITRONIC BOLTS

Nitronic grade fasteners have excellent corrosion resistance properties and strength. It has low magnetic permeability and excellent cryogenic properties.

 

Harsh Steel has released it own special Super Duplex Fastener Specification Our range of fasteners are manufactured using quality material that are known for high tensile strength and durability. These industrial fasteners are offered with Manufacturer Test Certificate as per EN 10204 / 3.1B. We offer industrial fasteners in different grades such as industrial washers, industrial screws, stainless washers and stainless screws. Available in different sizes, our range of fasteners can be customized as per the specifications of our clients.

Stainless Steel Fasteners

Harsh Steel is amongst the leading manufacturers of quality Stainless Steel Fasteners. These industrial stainless steel fasteners are made using top grade rust resistant steel to provide long life service. Widely used in different industries like defense industry, shipbuilding industry, chemical industry, fertilizer industry, petrochemical industry, refineries and steel plant, these industrial stainless steel fasteners are available in various grades and sizes as per the requirements of our clients.
Specifications

• Standard : ASTM / ASME A/SA 193 / 194
• Grade : B 8 (304), B 8C (SS 347), B 8M (SS 316), B 8 T (SS 321), A 2, A 4

Form

• Bolts : Bolts stud bolts, hex head bolts, socket hexagon head screw anchor bolts, u-bolts, J bolts, mushroom head square neck bolts, t- head bolts, wing screw, eye bolt, eye bolt, foundation bolts and structural bolts
• Washer : Plain washer , plain big & small OD washer , spring lock washer , spring washer heavy duty , tooth washer , star washer , tab washer with one & two tab
• Nuts : Hexagon nuts, hexagon coupling nuts, hexagon thin nut, square nut, hexagon castle nuts, self locking nut, hexagon domed cap nuts
• Screw : Pan head slotted screws, cheese head slotted screws, countersunk head slotted screws, countersunk raised head slotted screws, pan phillipse head screw, countersunk Phillipse raised head screws, slotted cheese trim head machine screws, socket head allen cap screws, allen countersunk socket head cap screws, socket head shoulder screws, socket head cap screw low head, hexagon socket set screw with flat point, hexagon socket set screws with cone point, hexagon socket set screw with dog point, hexagon socket set screws with dog point, hexagon socket set screws with cup point, imprial socket cap screws
• Other : Threaded rod, as per drawing and customers spec. coating, hot dipped galvanizing, phosphate, Teflon, xylon, zinc, cadmium.

We export our SUPER DUPLEX STEEL UNS S32750 NUTS products to Western and Eastern Europe, Saudi Arabia, Bangladesh, United States, United Arab Emirates, Canada, Angola, Argentina, Austria, Azerbaijan, Pakistan, Peru, Chile, Spain, France, United Kingdom, Indonesia, Israel, Iran, Kuwait, Mexico, Malaysia, Nigeria, Serbia, Singapore, Taiwan, Chile, Venezuela, Ecuador, Netherlands, Brazil, Colombia, Ghana, Iran, Denmark, Poland, Australia, Afghanistan, Bahrain, Costa Rica, Egypt, Iraq, Jordan, South Korea, Kazakhstan, Sri Lanka, Lithuania, Norway, Oman, Philippines, Poland, Qatar, Russia, Vietnam, South Africa, Nigeria, Mexico, Turkey, Hungary, Algeria, Belarus, Belgium, Bhutan, Bolivia, Bulgaria, Croatia, Czech Republic, Estonia, Finland, Greece, Italy, Japan, Libya, Romania, Thailand, Trinidad & Tobago,Tunisia, Ukraine, Yemen, Hong Kong, Gabon, China, Portugal, Switzerland, New Zealand, Sweden, Slovakia, Kenya, Lebanon, Morocco, Mongolia etc. We are sure that we also can cover the requirements requested by your company you can email us at harshsteel@ymail.com for your instant requirements.

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