Alloy 20 Nuts & Bolts Supplier & Exporter

GENERAL PROPERTIES

Alloy 20 (UNS N08020) is an austenitic, nickel-iron-chromium based super alloy with additions of Copper and Molybdenum which provide resistance to hostile environments, pitting, and crevice corrosion. It is also stabilized with Columbium to minimize carbide precipitation during welding. Alloy 20 appears to fall between both the stainless and nickel categories as it contains characteristics of both. It was designed for maximum resistance to acid attack and demonstrates superior resistance to stress-corrosion cracking in boiling 20% to 40% sulfuric acid, and also has excellent general corrosion resistance to sulfuric acid and to chloride stress corrosion cracking. Alloy 20 has good mechanical properties at both ambient and elevated temperatures, up to approximately 930°F (500°C) and is readily fabricated by usual industrial processes.

APPLICATIONS

Alloy 20 was originally designed for use in sulfuric acid related applications; however, it is now frequently used in a wide variety of industries. Applications that commonly use Alloy 20 include:

• Chemical and allied industries
• Food and dye production
• Heat exchangers
• Explosives
• Tanks
• Valves
• Pickling racks
• Manufacture of synthetic rubber and plastics
• Pharmaceuticals
• SO2 scrubbers and other severe environments

CORROSION RESISTANCE

• Excellent resistance to general corrosion, pitting, and crevice corrosion in chemicals containing chlorides and sulfuric, phosphoric, and nitric acids.
• Nickel content aids in chloride ion stress and corrosion resistance.
• Additions of Copper and Molybdenum provide resistance to hostile environments, pitting, and crevice corrosion.
• Chromium adds to its resistance of oxidizing environments such as nitric acids.
• Columbium reduces the effects of carbide precipitation.

WELDABILITY

• All commonly used welding methods, with the exception of oxyacetylene, can be successfully used.
• The presence of Columbium tends to minimize the precipitation of carbides in the heat-affected zone, so the material may be used in the as-welded condition in most cases.
• Pre-heating is not required.

HEAT TREAMENT

• Cannot be hardened by heat treatment.
• Stabilized-annealing is done at 1750-1850°F, followed by water quenching.
• Stress relieving can be performed on annealed material up to 950°F.

PROCESSING - HOT FORMING

• Heat uniformly to a starting temperature of 2100-2225°F. Finish forging before the stock drops below 1800°F.
• In order to stabilize the material after hot working operations, reheat at 1750-1850°F for a minimum of 1/2-hour per one inch of thickness and water quench.

PROCESSING - COLD FORMING

• Alloy 20 has good cold formability. Bending, drawing and pressing, and other forming operations that occur in the production of fabricated items are readily performed.
• Alloy 20 can normally be press brake bent over a radius twice the materials thickness.
• After cold reductions of more than 15%, a final stabilizing annealing is often required.

MACHINABILITY

Because of Alloy 20′s high work-hardening rate the following are required:

• Only low surface-cutting speeds are possible compared with low-alloy standard austenitic stainless steel.
• Tools should be engaged at all times.
• Heavy feeds are important in getting below the work-hardened 'skin'.

CHEMICAL PROPERTIES:

TYPE	C	Cr	Cu	Fe	Mn	Mo	Ni	P	Si	S	Nb (Cb)
Alloy 20 UNS N08020	0.07 max	min: 19.00 max: 21.00	min: 3.00 max: 4.00	Balance	2.00 max	min: 2.00 max: 3.00	min: 32.00 max: 38.00	0.045 max	1.00 max	0.035 max	8 XC min 1.00 max

MECHANICAL PROPERTIES:

Stabilized-Annealed Condition
Product Form	Tensile Strength, ksi (min)	Yield Strength, 0.2% offset ksi (min)	Elongation % (min)	Reduction of Area % (min)	Hardness Brinell (max)	Hardness Rockwell B (max)
Plate, Sheet	80	35	30	—	217	95
Bar	80	35	30	50	—	—

PHYSICAL PROPERTIES:

Density	Specific Gravity	Specific Heat at 32 to 212°F	Electrical Resistivity at 68°F	Poissons Ratio	Magnetic Permeability at 68°F	Modulus of Elasticity at 68°F
0.292 lbs/in3	8.08	0.12 BTU/lb/°F	644 ohm-cir mil/ft	0.31	1.002 Mu	29.3 x 106 psi

Cold Drawn Stainless steel Wire Round Bars Application : Machined Components, Pump Shafts, Valves, Fasteners, Machine Tools, Dairy Equipments, Surgical & Medical Parts, Threaded Bars, Studs, Bolts, Pins, Hinges and Handles. Condition Cold Drawn & Polished Cold Drawn, Centre less Ground & Polished Cold Drawn, Centre less Ground & Polished (Strain Hardened) Grades Alloy 286,Alloy 20, 202, 303, 304, 304L, 310, 316, 316L, 32, 410, 420, 416, 430, 431, 430F , 630, 17-4ph, Duplex steel 2205 304, 304L, 316, 316L Diameter (Size) 2 mm to 5mm (1/8" to 3/16") 6mm to 22m (1/4" to 7/8") 10mm to 40mm (3/8" to 1-1/2") Diameter Tolerance h9 (Din 671),h11 ASTM A 484 h9 (Din 671) ASTM A 484 h9 (Din 671),h11 ASTM A 484 Length 3/4/5.6/6 meter (12/14ft/20feet) 3/4/5.6/6 meter (12/14ft/20feet) 3/4/5.6/6 meter (12/14ft/20feet) Length Tolerance -0/+200mm or +100mm or +50mm  (-0 ”/+1 feet or +4 ” or 2 ”) -0/+200mm or +100mm or +50mm  (-0 ”/+1 feet or +4 ” or 2 ”) -0/+200mm  (-0 ”/+1 feet)    Peeled Turned Polished Stainless Steel Round Bars and Stainless steel forged Bars Condition Peeled, Centreless Ground & Polished Peeled & Polished Peeled  (Rough Turned) Forged, Rough Turned Grades Alloy 286,Alloy 20, 202, 303, 304, 304L, 310, 316, 316L, 32, 410, 420, 416, 430, 431, 430F , 630, 17-7,17-4ph, Duplex steel 2205, Duplex steel 2507 304, 304L, 316, 316L, 410, 416, 420, 431, 17-4Ph 303, 304, 304L, 316, 316L, 410, 416, 420, 431, 17-4 ph Diameter (Size) 20mm to 85mm  (3/4 ” to 3--1/4 ”) 85mm to 140mm (3-1/4 ” to 4--3/4 ”) 25mm to 140mm (1 ” to 5--1/2 ”) 150mm to 400mm (6 ” to 16 ”) Diameter Tolerance h9 (Din 671) tolerance ASTM A 484 h11 tolerance K12/K13 (Din 1013) -0mm/+3mm (-0 ”/+0.12 ”) Length 3/4/5.6/6 meter (12feet /14feet/20feet) 3/4/5.6/6 meter (12feet/14feet/20feet) 3/4/5.6/6 meter (12feet/14feet/20feet) 3 meter -5 meter 10 feet -16 feet Length Tolerance -0/+200mm or +100mm or +50mm  (-0 ”/+1 feet or +4 ” or 2 ”) -0/+200mm or +100mm or +50mm  (-0 ”/+1 feet or +4 ” or 2 ”) -0/+1000mm or 500mm (-0 ”/+3 feet or +2 feet) -0/+2 meter- -0/+6 feet

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.

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