Raaj Sagar Steels manufactures Alloy 20 Fasteners / Alloy 20 Stud Bolts, hex bolts, nuts, and screws to your custom specifications, and we guarantee to meet your delivery schedule. Alloy 20 Stainless Steel Bolts & Heavy Hex Bolts is often chosen to solve SCC problems, which may occur with 316L stainless. Alloy 20 Stainless Steel Bolts is a nickel-chromium-molybdenum stainless steel alloy developed for applications involving sulfuric acid.
Alloy 20, also known as Carpenter 20 is a specification for Alloy 20 Hex Nuts / hex bolts, studs and nuts manufactured from an iron-base austenitic alloy that offers excellent corrosion resistance for applications operating in hostile environments. Raaj Sagar Steels is one of the leading manufacturers, Supplier and exporters of high quality Alloy 20 Fasteners. Alloy 20 Hex Bolts fasteners are an economical alternative to Alloy 20 Hex Bolts / Alloy C276 & other high nickel content materials. Hex bolts, hex nuts & flat washers in stock now.
CARPENTER 20 Bolts IN STOCK. Buy direct from Indian Oil,Bharat Petroleum, Shell, BARC ,BHEL, HPCL, Saudi Aramco,GASCO Approved Manufacturer, Raaj Sagar Steels can make any type of Carpenter 20 fastener in any Size. Alloy 20 Screws are an economical alternative to Alloy C276 & other high nickel content materials. Alloy 20 Nuts And Bolts Hex bolts, Socket Head Cap Screw, hex nuts & flat washers in stock now.
We manufacture and supply a wide range of Alloy 20 Screws to our clientele spread across the globe. These alloy-20 Screws are being widely used in various industries for a large variety of applications.
Material |
Specification |
Standards | Size |
Length |
Alloy 20
|
IS BS ASTM |
ASTM B366 |
3 mm |
M02 to M33 |
Nuts Material | Alloy 20 |
---|---|
Specification | ANSI B18.2.2, ASTM A 479 / ASME SA 479 |
Alloy 20 Nut Bolt Standard | ISO, EN, DIN, JIS, BS, AISI, API, ASTM, ASME |
Alloy 20 Hex Nuts special price for | UAE, Dubai, Malaysia & Singapore clients. |
Size | 3 mm to 200 mm |
Length | M02 to M30 |
Alloy 20 Nut Bolt Thread | Coarse, fine |
Alloy 20 Nut Bolt Finish | Polish, Passivation |
Standard Dimensions | |
Alloy 20 Nut Bolt Production process | |
Bolts Material | Alloy 20 |
Specification | ANSI B18.2.2, ASTM A 479 / ASME SA 479 |
Standard | ISO, EN, DIN, JIS, BS, AISI, API, ASTM, ASME |
Alloy 20 Hex Bolts special price for | UAE, Dubai, Malaysia & Singapore clients. |
Size | 3 mm to 200 mm |
Length | M02 to M30 |
Thread | Coarse, fine |
Finish | Polish, Passivation |
Standard Dimensions | |
Production process |
Washers – Flat, Spring, Taper, Square, Clipped, Special thickness DTI Washer
Size:
Normal Dia : ¼” to 4″ 6-100 mm
Length : As Specified by user or Upto any Length.
Specification / Standard:DIN / ASME / BS / BS EN ISO /ASTM
Material:
Carbon Steel, Mild Steel, Alloy Steel, Ferritic & Austenitic Stainless Steel
Surface Finish:Plain,Zinc Plated , Hot Dip Galvanized, P.T.F.E. Coated
Corrosion Resistance
Alloy 20 bolts provide good performance in hot sulfuric acid, specifically they offer good resistance to stress-corrosion cracking in boiling sulfuric acid at specific range of 20% to 40% concentration, as well as general sulfuric acid resistance. Alloy 20 offers solid acid protection and will perform better than Duplex or even Monel, but for high temperature and high concentration acids, you may need to look to Inconel or Hastelloy fasteners. In addition, Alloy 20 bolts also show useful resistance to phosphoric acid and nitric acid.
Key Corrosion Resistant Features:
Carpenter Alloy 20 Temperature
In addition to their corrosion resistance, Alloy 20 bolts also perform well at moderately high temperatures, with the ability to maintain their mechanical strength up to 1000°F.
Nickel Alloy 20 Welding
Alloy 20 bolts are stabilized with Columbium to minimize carbide precipitation during welding. In addition it offers intergranular corrosion resistance in the as-welded condition.
Alloy 20 Cb Applications
• Power plants rely on alloy 20 bolts for flue-gas desulfurization
• Alloy 20 bolts are used to connect heat exchangers, mixing tanks, metal cleaning equipment, pickling tanks and racks, and piping in mid-range corrosive chemcial processing environments.
• Alloy 20 bolts help solve corrosion issues in food and dye production.
• Manufacturers of plastics and synthetic rubber also utilize alloy 20 fasteners.
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.
Also known as Carpenter 20 and 20CB-3, Alloy 20 bolts offer users a combination of nickel, chromium, molybdenum, and copper which provides good general corrosion resistance. Alloy 20 bolts are best suited for mid-range corrosion use – better than steel alloys but not at the level of high performance nickel based alloys like Hastelloy C276. Alloy 20 is a nickel alloy that was specifically designed to withstand the harsh environment of hot sulfuric acid but also performs well in a variety of other acids. Alloy 20 bolts are an ideal choice when you don’t need the corrosion resistance power and price-tag of high performance nickel alloys like Hastelloy C276; but you need something that will give you more protection than 316 stainless steel or even a Super Duplex 2507 stainless steel.
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 |
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 | — | — |
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 |
Alloy 20 Specifications: UNS N08020, ASME SA240, ASME SB366, ASME SB462, ASME SB463, ASME SB464, ASME SB473, ASME SB729, ASTM A240, ASTM B366, ASTM B463, ASTM B464, ASTM B473, ASTM B729, ASTM BB462, ANSI/ASTM A555-79, EN 2.4660, Werkstoff 2.4660, CN7M, DIN 2.4660
Alloy 20 |
20Cb-3® |
UNS N08020 |
Carpenter 20® |
EN/DIN 2.4660 |
NOMINAL SIZE (D) | BODY DIAMETER | HEAD THICKNEASTM | ACROASTM THE FLATS | ACROASTM CORNERS | ||||
---|---|---|---|---|---|---|---|---|
D (MAX) | D (MIN) | H (MAX) | H (MIN) | F (MAX) | F (MIN) | C (MAX) | C (MIN) | |
m10 | 10.00 | 9.78 | 6.63 | 6.17 | 17.00 | 15.73 | 18.48 | 17.77 |
m12 | 12.00 | 11.73 | 7.76 | 4.24 | 19.00 | 17.73 | 20.78 | 20.03 |
m14 | 14.00 | 13.73 | 9.09 | 8.51 | 22.00 | 20.67 | 24.25 | 23.35 |
m16 | 16.00 | 15.73 | 10.32 | 9.68 | 24.00 | 23.67 | 27.71 | 26.75 |
m20 | 20.00 | 19.67 | 12.88 | 12.12 | 30.00 | 29.16 | 34.64 | 32.95 |
m24 | 24.00 | 23.67 | 15.44 | 14.56 | 36.00 | 35.00 | 41.57 | 39.55 |
m30 | 30.00 | 29.67 | 19.48 | 17.92 | 46.00 | 45.00 | 53.12 | 50.85 |
m36 | 36.00 | 35.61 | 23.38 | 21.63 | 55.00 | 53.80 | 63.51 | 60.79 |
m42 | 42.00 | 41.38 | 26.97 | 25.03 | 65.00 | 62.90 | 75.06 | 71.71 |
m48 | 48.00 | 47.38 | 31.07 | 28.93 | 75.00 | 72.60 | 86.60 | 82.76 |
m56 | 56.00 | 55.26 | 36.2 | 33.80 | 85.00 | 82.20 | 98.15 | 93.71 |
m64 | 64.00 | 63.26 | 41.32 | 38.68 | 95.00 | 91.80 | 109.70 | 104.65 |
m72 | 72.00 | 71.26 | 46.45 | 43.55 | 105.00 | 101.40 | 121.24 | 115.60 |
m80 | 80.00 | 79.26 | 51.58 | 48.42 | 115.00 | 111.00 | 132.72 | 126.54 |
m90 | 90.00 | 89.13 | 57.74 | 54.26 | 130.00 | 125.50 | 150.11 | 143.07 |
m100 | 90.00 | 99.13 | 63.9 | 60.10 | 145.00 | 140.00 | 167.43 | 159.60 |
**All measurements in millimeters**
Nominal Size or Basic Major Thread Diameter | F | G | H | ||||||
Width Across Flats | Width Across Corners | Thickness | |||||||
Basic | Max | Min | Max | Min | Basic | Max | Min | ||
1/4 | .2500 | 7/16 | .438 | .428 | .505 | .488 | 7/32 | .226 | .212 |
5/16 | .3125 | 1/2 | .500 | .489 | .577 | .557 | 17/64 | .273 | .258 |
3/8 | .3750 | 9/16 | .562 | .551 | .650 | .628 | 21/64 | .337 | .479 |
7/16 | .4375 | 11/16 | .688 | .675 | .794 | .768 | 3/8 | .385 | .365 |
1/2 | .5000 | 3/4 | .750 | .736 | .866 | .840 | 7/16 | .448 | .427 |
9/16 | .5625 | 7/8 | .875 | .861 | 1.010 | .982 | 31/64 | .496 | .473 |
5/8 | .6250 | 15/16 | .938 | .922 | 1.083 | 1.051 | 35/64 | .559 | .535 |
3/4 | .7500 | 1-1/8 | 1.125 | 1.088 | 1.299 | 1.240 | 41/64 | .665 | .617 |
7/8 | .8750 | 1-5/16 | 1.312 | 1.269 | 1.516 | 1.447 | 3/4 | .776 | .724 |
1 | 1.0000 | 1-1/2 | 1.500 | 1.450 | 1.732 | 1.653 | 55/64 | .887 | .831 |
1-1/8 | 1.1250 | 1-11/16 | 1.688 | 1.631 | 1.949 | 1.859 | 31/32 | .999 | .939 |
1-3/8 | 1.3750 | 2-1/16 | 2.062 | 1.994 | 2.382 | 2.273 | 1-11/64 | 1.206 | 1.138 |
1-1/2 | 1.500 | 2-1/4 | 2.250 | 2.175 | 2.598 | 2.480 | 1-9/32 | 1.ASTM A194 GR. 8 | 1.245 |
1-5/8 | 1.6250 | 2-7/16 | 2.438 | 2.356 | 2.815 | 2.686 | 1-25/64 | 1.429 | 1.353 |
1-3/4 | 1.7500 | 2-5/8 | 2.625 | 2.538 | 3.031 | 2.893 | 1-1/2 | 1.540 | 1.460 |
2 | 2.0000 | 3 | 3.000 | 2.900 | 3.464 | 3.306 | 1-23/32 | 1.763 | 1.675 |
2-1/4 | 2.2500 | 3-3/8 | 3.375 | 3.263 | 3.897 | 3.719 | 1-15/16 | 1.986 | 1.890 |
2-1/2 | 2.5000 | 3-3/4 | 3.750 | 3.625 | 4.330 | 4.133 | 2-5/32 | 2.209 | 2.105 |
2-3/4 | 2.7500 | 4-1/8 | 4.125 | 3.988 | 4.763 | 4.546 | 2-3/8 | 2.431 | 2.319 |
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