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Address: Room 1703, 17th Floor, Building 5, Jinyin Modern City, Guangdian South Road, Jinshui District, Zhengzhou City, Henan Province, China.
Contact name:Vicky
Zhengzhou Huitong Pipeline Equipment Co.,Ltd. |
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Carpenter 20/20Cb-3 Alloy 20 spring washer DIN127 GB93 UNI1751
1. The definition for Alloy 20 spring washer
Spring washers, which have axial flexibility and are used to prevent fastening or loosening due to vibrations. Locking washers, which prevent fastening or loosening by preventing unscrewing rotation of the fastening device; locking washers are usually also spring washers.
In theory split washers (aka lock washers or helical spring washers) are supposed to work by squishing flat between the nut and the mounting surface when you tighten them. At this point the sharp edges of the washer are supposed to dig into the nut and mounting surface to prevent counter-clockwise rotation
Also known as Carpenter 20 and 20CB-3, Alloy 20 flanges offer users a combination of nickel, chromium, molybdenum, and copper which provides good general corrosion resistance. Alloy 20 flanges 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 flanges 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.
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 | Ni | Cr | Mo | Mn | Cu | Si | C | S | P | Cb+Ta | Fe |
| Min | 32.5 | 19.0 | 2.0 | - | 3.0 | - | - | - | - | 8.0*C1.0 | - |
| Max | 35.0 | 21.0 | 3.0 | 2.0 | 4.0 | 1.0 | 0.1 | 0.0 | 0.0 | Bal |
Mechanical Properties
• Ultimate tensile strength: 80 ksi
• Yield strength: 35 ksi
• Density: 0.292 lb/in.3
• Electrical Resistivity (RT) 651 ohm-cir mil/ft
• Elongation: 30%
2. Alloy 20 spring washer dimension
| roduct Name | alloy 20 spring washer |
| Size | Diameter: φ2-φ100 |
| Material | Carbon Steel, Alloy Steel, Stainless Steel, Copper, Ti,brass, Al, Mg |
| Grade | Alloy 20; Hastelloy C276; Incoloy 600/601; Inconel 625; Incoloy 800/800H/800HT AL-6XN; ASTM A453 Grade 660A/B/C/D and so on |
| Finsh | Zinc plate (white,blue,yellow,black), Zn/Ni plating, Mechanical zinc plating, Cr3+, black oxide, Ni plate, brass plate, electrophoresis, dacromet, hot-dipped galvanized, positive electrode oxidization, etc. |
| The Most Precise Tolerances That GuJietong Can Process | 1) Shaft diameter below 6mm and maximum pore size tolerance up to 0.003mm 2) Shaft diameter larger than 6mm and pore size tolerance is 0.005mm 3) Linearity below 100mm distance etc, tolerance is up to 0.005mm 4) 100mm or more distance linear tolerance is up to 0.01mm 5) A form tolerance is up to 0.003 - 0.005mm 6) Position tolerance is up to 0.01mm |
| Production Equipment | 1) CNC Machining Center; 2) CNC Lathe; 3) CNC Milling Machine; 4) Precision Cutting Machine |
| Measuring Instruments and Equipment | 1) micrometer 2) smooth plug gauge 3) thread gauge 4) Image measuring instrument 5) Coordinate Measuring Machine 6) Roughness tester 7) routine inspection of calipers |
| Preferred Drawing Formats | JPEG, PDF, CAD, IGS, STP |
| Preferred Industries | 1) Communication Equipments 2) Medical Equipments 3) Photo electricity Equipments 4) Auto Industry 5) Mechanical Equipments 6) Other customized Parts |
Our advantage
| Small MOQ can be accepted
Free samples can be provided within 1-2days if from stock.
Samples will be send to customers for quality confirmation before shipping and steel certificate and inspection report can be provided!
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| Other services are consulted in dealing | If you have any inquiry, just feel free to contact and let me know which exactly item(type) you need, I will do my best to service you here |
3. The difference between DIN127 A and B for Alloy 20 spring washer
| Φ10 | d | n | h | H | ||||
| Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. | |
| DIN127A | 10.2 | 10.7 | 3.5 | 3.7 | 2.05 | 2.35 | 4.4 | 5.2 |
| DIN127B | 10.2 | 10.7 | 3.3 | 3.7 | 2.05 | 2.35 | 5 | 5.9 |
