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Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, Uzbekistan, Austria, Germany, Hungary, Liechtenstein, Poland, Slovakia, Switzerland, The Czech Republic, Chad, Central African Republic, Cameroon, Equatorial Guinea, Gabon, The Republic of Congo , The Democratic Republic of the Congo, The Democratic Republic of Sao Tome and Principe, Belize, Costa Rica, Guatemala, Honduras, Nicaragua, Panama, Salvador, China, Hong Kong-China, Japan, Mongolia, Macao-China, North Korea, South Korea, Taiwan-China, Belarus, Estonia, Kosovo, Latvia, Lithuania, Moldova, Russia, Ukraine, Burundi, Djibouti, Ethiopia, Eritrea, Kenya, Mayotte, Mauritius, Rwanda, Reunion, Somalia, Seychelles, South Sudan, Tanzania, Uganda, Aland Islands, Bonaire,SaintEustatiusAndSaba, Denmark, Finland, Faroe Islands, Iceland, Norway, Sweden, Algeria, Egypt, Libya, Morocco, Sudan, Tunisia, Antigua and Barbuda, Anguilla, Aruba, Bahamas, Barbados, Bermuda, Canada, Cuba, Commonwealth of Dominica, Cayman Islands, Dominican, Grenada, Greenland, Guadeloupe, Haiti, Jamaica, Jersey, Mexico, Martinique, Montserrat, Puerto Rico, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Saint Pierre And Miquelon, Sint Maarten, Trinidad and Tobago, United States, United States Minor Outlying Islands, U.S.Virgin Islands, Australia, American Samoa, Cocos Islands, Fiji, French Polynesia, Guam, Kiribati, Micronesia, Marshall Islands, New Zealand, Nauru, Niue, Northern Mariana Islands, New Caledonia, Papua New Guinea, Palau, Solomon Islands, Samoa, Tuvalu, Tonga, The Cook Islands, Tokelau, Vanuatu, Wallis And Futuna, Brunei, Cambodia, East Timor, Indonesia, Laos, Myanmar, Malaysia, Philippines, Singapore, Thailand, Vietnam, Bhutan, Bangladesh, India, Maldives, Nepal, Pakistan, Sri Lanka, Andorra, Albania, Bulgaria, Bosnia and Herzegovina, Croatia, French Southern Territories, Greece, Italy, Malta, Macedonia, Montenegro, Portugal, Romania, Spain, San Marino, Slovenia, Serbia, Vatican, Angola, Botswana, Comoros, Lesotho, Malawi, Mozambique, Madagascar, Namibia, South Africa, Swaziland, Saint Helena, Zambia, Zimbabwe, Argentina, Brazil, Colombia, Chile, Curacao, Ecuador, Falkland Islands, French Guiana, Guyana, Llívia, Peru, Paraguay, Suriname, Uruguay, Venezuela, Azerbaijan, Armenia, Afghanistan, Bahrain, Cyprus, Georgia, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Qatar, Syria, State of Palestine, Saudi Arabia, Turkey, United Arab Emirates, Yemen, Belgium, France, Guernsey, Ireland, Isle Of Man, Luxembourg, Monaco, Netherlands, United Kingdom, Burkina Faso, Benin, Cape Verde, Côte d'Ivoire, Gambia, Guinea, Guinea-Bissau, Ghana, Liberia, Mauritania, Mali, Niger, Nigeria, Senegal, Sierra Leone, Togo, Western Sahara
Precision seamless tubes have the following characteristics:
High Precision
High Dimensional Precision: Precision seamless tubes undergo precision - processing techniques such as cold - rolling. Their outer diameter, inner diameter, and wall thickness have strictly - controlled dimensional tolerances. Generally, the outer - diameter tolerance can be controlled between ±0.05mm and ±0.25mm, and the wall - thickness tolerance can be controlled between ±0.03mm and ±0.12mm. They can meet the dimensional requirements of various high - precision mechanical parts, reduce the machining allowance and man - hours, and improve material utilization.
High Shape Precision: They have good straightness and roundness, and the bending of the tubes is minimal. During use, they can better ensure the fitting precision with other components and ensure the stability and reliability of the entire mechanical system. They are often used to manufacture parts with extremely high shape - precision requirements, such as hydraulic pipes and bearing rings in the aerospace field.
High Performance
High Strength: The materials generally selected are high - quality carbon - structural steels, low - alloy structural steels, etc. After special heat - treatment processes such as quenching and tempering, they have high tensile strength, yield strength, and hardness. They can withstand relatively large working pressures and loads and meet the usage requirements of various engineering structures and mechanical parts under harsh working conditions.
Good Toughness: While ensuring high strength, they also possess good toughness. They can effectively absorb and dissipate energy when subjected to impact loads and dynamic loads, avoid brittle fracture, and extend the service life. They are suitable for occasions that need to withstand frequent vibrations and impacts, such as the fields of construction machinery and automobile manufacturing.
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