Description
Alloy 20 (UNS N08020) Sheets / 20CB3 Sheets
What is Alloy 20 (UNS N08020) ?
Alloy 20 (UNS N08020) is an austenitic stainless steel developed for applications involving sulfuric acid. Its corrosion resistance also finds other uses in the chemical, petrochemical, power generation, and plastics industries. Alloy 20 resists pitting and chloride ion corrosion, better than 304 stainless steel and on par with 316L stainless steel. Its copper content protects it from sulfuric acid. Alloy 20 is often chosen to solve stress corrosion cracking problems, which may occur with 316L stainless. Alloy of the same name with the designation “Cb-3” indicates columbium stabilized.
Alloy 20 (UNS N08020) was designed specifically to withstand sulfuric acid. Its nickel, chromium, molybdenum and copper levels all provide excellent general corrosion resistance. Restricted carbon plus columbium stabilization permits welded fabrications to be used in corrosive environments, normally without post-weld heat treatment. At 33% nickel, Alloy 20 has practical immunity to chloride stress corrosion cracking. This alloy is often chosen to solve SCC problems, which may occur with 316L stainless.
Inventory :
- • Alloy 20 Plates
- • Alloy 20 Sheets
- • UNS N08020 Plates
- • UNS N08020 Sheets
- • Alloy 20 Pipes
- • Alloy 20 Round Bar
Common Trade Names :
- • Carpenter® 20
- • 20CB-3®
- • UNS N08020
- • DIN 2.4660
- • CN7M
- • Carpenter 20 CB-3TM
- • AL 20TM
- • Carlson Alloy C20TM
- • Nickelvac 23TM
- • Nicrofer 3620 NbTM, also known as VDM® Alloy 20
Standards:
- • ASTM/ASME: UNS N08020
- • EURONORM: FeMi35Cr20Cu4Mo2
- • DIN: Werkstoff Nr. 2.4660
Chemical Composition of Alloy 20 (UNS N08020) :
| Chemical | Min | Max |
| Nickel | 32.00 | 38.00 |
| Chromium | 19.00 | 21.00 |
| Carbon | – | 0.07 |
| Copper | 3.00 | 4.00 |
| Molybdenum | 2.00 | 3.00 |
| Manganese | – | 2.00 |
| Silicon | – | 1.00 |
| Niobium + Tantalum | 8.0 X C | 1% maximum |
| Phosphorus | 0.045 | |
| Sulfur | 0.035 | |
| Iron | Balance | |
Product Form :
| Product Form | Specification | |
| ASTM | ASME | |
| Plate, Sheet and Strip | B463 | SB-463 |
| Bar and wire | B473 | SB-473 |
| Billets and bars for reforging | B472 | – |
| Welded pipe | B464 | SB-464 |
| Electric fusion welded pipe | B474 | – |
| Welded tubes | B468 | SB-468 |
| Weaving wire | B475 | – |
| Round spring wire | B471 | – |
| Forged pipe flanges, fittings, valves and parts | B462 | SB-262 |
| Factory-made wrought nickel and nickel alloy welding fittings | B366 | SB-366 |
Features of Alloy 20 :
- • Excellent resistance to hot sulfuric acid
- • Resistant to intergranular corrosion in the as-welded condition
- • Chloride stress corrosion cracking resistance
Applications :
- • Sulfuric acid pickling tanks, racks and heating coils
- • Phosphate coating drums and racks
- • Heat exchangers
- • Bubble caps
- • Process piping
- • Mixing tanks
- • Chemical and petroleum process equipment
Cities we Supply our Alloy 20 (UNS N08020) Sheets, Plates to :
Andhra Pradesh, Arunachal Pradesh, Assam, Bihar, Chhattisgarh, Goa, Gujarat, Haryana, Himachal Pradesh, Jammu and Kashmir, Jharkhand, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Manipur, Meghalaya, Mizoram, Nagaland, Odisha, Punjab, Rajasthan, Sikkim, Tamil Nadu, Telangana, Tripura, Uttar Pradesh, Uttarakhand, West Bengal, Hyderabad, Itanagar, Dispur, Patna, Raipur, Panaji, Gandhinagar, Chandigarh, Shimla, Srinagar, Jammu , Ranchi, Bengaluru, Thiruvananthapuram, Bhopal, Mumbai, Imphal, Shillong, Aizawl, Kohima, Bhubaneswar, Chandigarh, Jaipur, JajPur, Gangtok, Chennai, Agartala, Lucknow, Dehradun, Kolkata, Visakhapatnam, Vijayawada, Guntur, Nellore and Tirupati, Visakhapatnam, Vijayawada, Guntur, Nellore and Tirupati, Guwahati, Tezpur, Dibrugarh, Silchar and North Lakhimpur, Gaya, Biharsharif, Darbhanga and Bhagalpur, Bilaspur, Korba, Durg-Bhilainagar, Raigarh and Rajnandgaon, Vasco-da-Gama, Ponda, Margao, Mapusa and Goa Velha, Ahmedabad, Surat, Rajkot, Junagadh and Vadodara, Faridabad, Gurgaon, Sonipat, Panipat and Ambala, Dharamshala, Mandi, Solan, Bilaspur and Chamba, Anantnag, Leh, Udhampur, Ramnagar and Baramulla, Bokaro Steel City, Jamshedpur, Deoghar, Hazaribagh and Dhanbad, Mysore, Davangere, Mangalore, Hubli-Dharwad and Belgaum, Kochi, Kozhikode, Thrissur and Malappuram, Indore, Gwalior, Jabalpur, Ujjain and Sagar, Pune, Nagpur, Nashik, Aurangabad and Solapur, Bishnupur, Ukhrul, Tamenglong, Chandel and Senapati, Cherrapunji, Tura, Jowai, Baghmara and Nongpoh, Lunglei, Serchhip, Champhai, Tuipang and Mamit, Tuensang, Zunheboto, Mokokchung, Kiphire Sadar and Phek, Rourkela, Cuttack, Brahmapur, Puri and Sambalpur, Amritsar, Jalandhar, Ludhiana, Patiala and Kapurthala, Bikaner, Jaisalmer, Jodhpur, Udaipur and Ajmer, Bikaner, Jaisalmer, Jodhpur, Udaipur and Ajmer, Tiruchirappalli, Madurai, Erode, Vellore and Coimbatore, Warangal, Nizamabad, Karimnagar, Adilabad and Khammam, Warangal, Nizamabad, Karimnagar, Adilabad and Khammam, Noida, Varanasi, Allahabad, Agra and Kanpur, Haridwar, Roorkee, Rishikesh, Kashipur and Haldwani, Darjeeling, Siliguri, Asansol, Howrah and Durgapur, Andaman and Nicobar Islands, Chandigarh, Dadra and Nagar Haveli, Daman and Diu, Lakshadweep, NCT of Delhi, Puducherry, Port Blair, Chandigarh, Silvassa, Daman, Kavaratti, New Delhi.
