NEWS

  • The key technology of anti-impact prestressed support for coal mine roadway won the 2020 National Science and Technology Award

    The key technology of anti-impact prestressed support for coal mine roadway won the 2020 National Science and Technology Award

    On November 3, the Party Central Committee and the State Council solemnly held the 2020 National Science and Technology Awards Conference in the Great Hall of the People in Beijing. The project completed by Anyang Longteng Heat Treatment Material Co., Ltd. won the National Technical Invention Awa...
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  • Hexagon head screw ISO 4017, CE, DOP, full thread

    Hexagon head screw ISO 4017, CE, DOP, full thread

    Product:hexagon head screws / full thread  Specification:M20-M72 Property Class: ISO898-1  8.8, 10.9 Elongation after fracture   Minimum tensile strength Lower yield strength or stress ar 0.2% non-proportional elongation Stress under proof load Strength under wedge loading Hardness Impact stren...
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  • The 21st Suzhou Fasteners and Technology Exhibition

    The 21st Suzhou Fasteners and Technology Exhibition

                          The 21st Suzhou Fasteners and Technology Exhibition, time: October 27-29, 2021, location: Suzhou International Expo Center   Anyang Longteng Heat Treatment Material Co.,Ltd established in 19th Jan. 2005, with mor...
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  • Production License of Special Equipment People’s republic of China

    Production License of Special Equipment People’s republic of China

    On October 23, 2021, there was good news from the State Administration of Market Supervision: The company successfully passed the evaluation of the additional item of pressure piping component manufacturing, and obtained the special equipment production license of the People’s Republic of China (...
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  • 2021 Beijing International Wind Energy Exhibition

    2021 Beijing International Wind Energy Exhibition

    Anyang Longteng Heat Treatment Material Co., Ltd. We sincerely invite you to visit 2021.10.18—2021.10.20 2021 Beijing International Wind Energy Exhibition  COMPANY PROFILES Anyang Longteng Heat Treatment Material Co., Ltd. (formerly Anyang Longteng Special Steel Manufacturing Co., Ltd....
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  • Wind power big size hex bolts CE EN 14399-4 M48*210 10.9 HV bolt tornillo

    Wind power big size hex bolts CE EN 14399-4 M48*210 10.9 HV bolt tornillo

                      We are CE certified manufacturer producing high strength bolt assembly. EN14399-1 EN 14399-4 are availabe from HV M20-M64, grade 12.9, 10.9, 8.8. High-strength structural bolting assemblies for preloading – HV system Threaded a...
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  • Wind Turbine Blade stud bolt assembly – Anyang Longteng

    Wind Turbine Blade stud bolt assembly – Anyang Longteng

      Blade bolts are one of other fasteners and connectors. Dedicated to the transmission and connection of wind power equipment. Product specifications: M33×128 M30×428; material: B7, 10.9; runout degree of screw hole center to plane <0.02mm; bolt straightness <0.05mm; mechanical proper...
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  • Class 12.9 bolts Strength

    Class 12.9 bolts Strength

    According to ISO 898-1, Mechanical pr physical property for class 12.9 is as below: Tensile strength min 1220 MPa Stress at 0.2% non-proportional elongation, Rp0.2, min 1100 MPa Stress under proof load, 970MPa percentage elongation of area after fracture for machined test pieces, A,  8% Percentag...
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  • Why do bolts have 4.8/8.8/10.9/12.9 grades?

    Why do bolts have 4.8/8.8/10.9/12.9 grades?

    Take the 10.9 level as an example: 10 represents the nominal tensile strength (1000MPa), and 9 represents the yield strength ratio (0.9). The rest can be deduced by analogy. No other grades are currently seen, and grade 12.9 is relatively rare. The materials used for grade 8.8 and 10.9 are 42CrMo...
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  • 20# Steel seamless pipes – Anyang Longteng Heat Treatment Material Co.,Ltd

    20# Steel seamless pipes – Anyang Longteng Heat Treatment Material Co.,Ltd

    Grade 20# steel The 20# steel refers to a carbon content of 0.2%, which is a low-carbon steel. Steel can be divided into low carbon steel, medium carbon steel and high carbon steel. Carbon content: low carbon steel is generally less than 0.25%; medium carbon steel is generally between 0.25 and 0....
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  • The Standing Committee of the Municipal People’s Congress inspected Anyang Longteng

    The Standing Committee of the Municipal People’s Congress inspected Anyang Longteng

    On August 24, the Standing Committee of the Municipal People’s Congress organized some members of the Standing Committee of the Municipal People’s Congress and representatives of the Municipal People’s Congress to conduct a centralized inspection of the implementation of the cit...
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  • Announcement on our company’s greenhouse gas emissions in 2020

    Announcement on our company’s greenhouse gas emissions in 2020

    According to the “Notice of the National Development and Reform Commission on Organizing and Carrying out the Reporting of Greenhouse Gas Emissions by Key Enterprises (Institutions) (Fagai Climate [2014] No. 63)”, “Interim Measures for the Management of Carbon Emission Trading&#...
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  • TENSILE TEST – PRODUCE HIGH STRENGTH ANCHOR BOLT (DECRIPTION & VEDIO)

    TENSILE TEST – PRODUCE HIGH STRENGTH ANCHOR BOLT (DECRIPTION & VEDIO)

    Anyang Longteng Heat Treatment Co.,Ltd are professional high duty steel anchor bolt manufacture and exporter. We got the advanced technology to produce anchor bolt, high strength fastener, rock bolt, hold down bolt, threaded rods, anchor cages, etc.  Below is the main process to produce the ancho...
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  • Depth of Decarburization – stud bolt inspection in Anyang Longteng Heat Treatment Material Co.,Ltd

    Depth of Decarburization – stud bolt inspection in Anyang Longteng Heat Treatment Material Co.,Ltd

    (1)Decarburization of anchor bolts shall be performed by Metallographic  method according to GB/T3098.1 regulations.  (2)Decarburization of threaded parts shall be performed by metallographic method according to GB/T224-2008 “Determination of depth of decarburization of steels”.  ...
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  • Anyang Longteng Get BV Certificate

    Anyang Longteng Get BV Certificate

    In order to promote the company’s strategy of opening up the international market and combining with the company’s business reality, the classification society certification work will be launched in early July 2021. So that the company completed the forensic work in time. During the c...
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  • Production procedures for high-strength heat-treated hexagon head bolt

    Production procedures for high-strength heat-treated hexagon head bolt

    Production process for heat-treated hex head bolt                                               -Anyang Longteng Heat Treatment Material Co.,Ltd Raw material retest Pealling(larger than M20) / drawing(smaller than M20) Cutting Chamfering Hot-forged Chamfering hex head Heat-treatment Lathing Thre...
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  • Bridge application stress bar

    Bridge application stress bar

    Product name: Stress bar Diameter: M80 M64 M56 M53 M48  M42 M36 M24 M20 or as customer’s requirement Length: not more than 12 meter Thread: thread both ends or as cusotmer’s requirements Mechanical property: 8.8 10.9 grade according to ISO 898-1, GB/T 3098.1 Or customer’s techni...
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  • Anyang Longteng fight in the storm

    Anyang Longteng fight in the storm

    In the past few days, our city has encountered continuous heavy rainfall and serious water accumulation inside and outside the factory. The company’s flood control emergency headquarters immediately activated the flood control emergency plan, and each emergency team member was on duty 24 ho...
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  • Procuroment rules for hexagon nut

    Procuroment rules for hexagon nut

    NUTS 1 Chemical composition test Within a specified time,incoming nuts materials of grade 35CrMo shall be retest, and results must be in accordiance with TABLE 1.   TABLE 1-1 Chemical composition of nuts(mass fraction)) /% Grade C Si Mn Cr Mo P S 35CrMo 0.32~0.40 0.17~0.37 0....
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  • Henan Province Officer of project “Ten Thousand People Help Ten Thousand Enterprises” visited Anyang Longteng

    Henan Province Officer of project “Ten Thousand People Help Ten Thousand Enterprises” visited Anyang Longteng

    On the morning of July 20, 2021, the fifth working group of Henan Province “Ten Thousands People Help Ten Thousand Enterprises” visited our company’s φ114 hot-rolled seamless steel pipe production line project to carry out “three batches” key project service work. Wa...
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  • Condense the heart & gather strength, work hard for 100 days

    Condense the heart & gather strength, work hard for 100 days

    At 7:00 on July 2nd, Anyang Longteng’s “Condense the heart & gather strength, work hard for 100 days” mobilization meeting was held in front of the office building of the company.More than 200 employees and management personnel from each workshop attended the meeting. Genera...
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  • Fasteners for ship building

    Fasteners for ship building

    Shipbuilding fasteners are always high strength with big diameter, some of which need to be milled and threaded. Anyang Longteng Heat Treatment Material Co.,Ltd is a professional thread rod factory, providing OEM services for shipbuilding fasteners that can be inspected by Bereau Veritas, DNV, Lo...
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  • Congratulations! Our Lab certified by CNAS in 2021

    Congratulations! Our Lab certified by CNAS in 2021

    On June 17, 2021, Anyang Longteng Heat Treatment Materials Co., Ltd.  laboratory successfully pass the CNAS accreditation review. The China National Accreditation Service for Conformity Assessment granted the company’s laboratory CNAS accreditation and issued a certificate.  CNAS is the English a...
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  • Deputy secretary of Anyang Municipal Party Committee, visited the company to investigate and guide the work

    Deputy secretary of Anyang Municipal Party Committee, visited the company to investigate and guide the work

    On June 9, 2021, Li Yibo, deputy secretary of Anyang Municipal Party Committee, visited our 114 hot continuous rolling seamless steel pipe production line project for investigation, accompanied by Lei Ming, secretary of Yindu District Party Committee, Mei Mei, member of the Standing Committee of ...
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