News

  • What standards do we follow when cold-rolling threads on steel round bar?

    What standards do we follow when cold-rolling threads on steel round bar?

    For Anyang Longteng Heat Treatment Material Co.,Ltd, a professional threaded round bar manufacturer, we are 100% following customers requirements. A high percentage of our customers ask for metric screw threads, so metric threads are so familiar. Below standards are our base standards: GB/T 196-2...
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  • Essential information for 42CrMo4

    Essential information for 42CrMo4

    42CrMo4 alloy steel   Standard: EN 10083/3-2006 Application: machine construction, base plates, axes, gear shafts, gear wheels Surface condition: black, polished, rough machined, turned, painted, oil or grease covered Chemical composition: C: 0.38 ~0.45; Si: ≤0.40; Mn:0.60~0.90; S: ≤0.035;...
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  • Let’s List Slope Stabilization Methods

    Let’s List Slope Stabilization Methods

    Slopes are all around us in the urban environment, and the soil on some of these slopes maybe inherently unstable. Movement of soil and rock down unstable slopes due to gravity is called mass wasting; surface movement resulting from the effects of wind and water is called erosion. With the expans...
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  • INDICATOR for MT 146.2 Resin anchor bolt – steel bars and accessories China Supplier for sell

    INDICATOR for MT 146.2 Resin anchor bolt – steel bars and accessories China Supplier for sell

    Indicator for Coal industrial standard of PRC MT146.2 Resin anchor bolt part 2: steel bars and accessories. Many people don’t know what is MT. “MT” is the acronym of “Mei Tan” in Chinese language, which means “Coal”. 3 types of resin rock bolts:         ...
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  • Wind Turbine Foundation Anchor Cage Project within 3 Years – Anyang Longteng Heat Treatment Material Co.,Ltd

    Wind Turbine Foundation Anchor Cage Project within 3 Years – Anyang Longteng Heat Treatment Material Co.,Ltd

    LT Successful Project Within 3 Years COUNTRY PROJECT TURBINE COMPANY IMPLEMENTATION YEAR PRODUCT CONDITION P.R.CHINA DONGDAZHAI 48MW WIND FARM IN LAIXI, SHANDONG PROVINCE   GOLDWIND 2016.5.30 FOUNDATION ANCHOR CAGE ASSEMBLY COMPLETE P.R.CHINA HETOUDIAN 48MW WIND FARM IN LAIXI,...
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  • President Message – Summary for the year 2018

    President Message – Summary for the year 2018

                          Mr. Feng Dibao: To speak of the year 2018, it’s a very critical year and a connecting link for Anyang Longteng Heat Treatment Material Co.,Ltd (LT).  Under the leadership of our board, every member devoted on one&...
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  • Magnetic Particle Test (MT) -PRODUCE HIGH STRENGTH ANCHOR BOLT

    Magnetic Particle Test (MT) -PRODUCE HIGH STRENGTH ANCHOR BOLT

    Magnetic particle inspection, also called MPI , or MT is a non-destructive test(NDT) process for detecting surface and shallow subsurface discontinuities in our heat treatment steel round bar materials. In order to improve our produce quantity, our wind turbine foundation system anchor bolt, roo...
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  • Will our factory give trainings to employees?

    Will our factory give trainings to employees?

     We hold training every seasons. As our group growing, we know that human ability is one of the most important to our group. Under market competition, if our group want to survive, we need human brain power, technology, information, fund resources as support. Human resource always has unpredictab...
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  • Development Trend of High Strength Bolting Steels – China manufacturer

    Development Trend of High Strength Bolting Steels – China manufacturer

        As everyone knows, strength property class for stud bolts are 8.8, 9.8, 10.9 and 12.9. And the main materials are mostly Quenched and tempered mid-carbon steel or mid-carbon alloy steel.     As the development of automobile, machinery, construction, renewable energy industries,  Fasteners, in...
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  • Perform Indicator for Steel Grade 42CrMo, Chemical and Mechanical Properties and performance

    Perform Indicator for Steel Grade 42CrMo, Chemical and Mechanical Properties and performance

    This article is to give brief introduction for grade 42CrMo, which is one of the most important alloy steel grade for high strength huge bolt in Chinese market, and which is the most common grade in our LT factory. If still more questions, welcome to contact us [email protected] Alloy Steel   Chi...
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  • Anchor bolt specification table, size, property class, cross section, yield strength, pitch, meter weight, diameter

    Anchor bolt specification table, size, property class, cross section, yield strength, pitch, meter weight, diameter

    Available sizes of anchor bolts : M16~M56 Property Class: 8.8  9.8  10.9  12.9 Name: double end stud bolt Material: Carbon Steel, Alloy Steel   Star products examples:   Property Class Cross section Yield Strength (MPa) Pitch kg/Meter Dia (mm) M36 8.8 817 660 4 6.838 33.23~33.29 1...
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  • SELF DRILLING HOLLOW GROUTING BOLT

    SELF DRILLING HOLLOW GROUTING BOLT

    Self-Drilling Anchors The self-drilling Hollow bar anchor system is comprised of a hollow threaded bar with an attached drill bit that can perform drilling, anchoring and grouting in a single operation. The hollow bar allows air and water to freely pass through the bar during drilling to remove d...
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  • Why hot rolled fully thread rebars are not continuously threaded?

    Why hot rolled fully thread rebars are not continuously threaded?

    Fully thread rebar and rock bolt are Anyang Longteng’s star products, which are widely used for pre-stressing and post-tesnioning purposes.   The reason why it’s chosen is, despite its high mechanical properties, but also because it can fit a nut directly without screw a new thread....
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  • Wind Turbine Foundation feet, Anchor Bolt ‘s Surface Quality Acceptance

      The surface quality of steel round bar shall conform to GB/T3077-2015 “ALLOY STRUCTURE STEEL”-6.10.1 The surface of steel materials used for pressure processing    The surface of steel materials used for pressure processing shall be free of crack, scar, folding or sundry matters. In...
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  • PSB400 PSB500 PSB785 PSB830 PSB930 PSB1080 Steel Rebars

    PSB400 PSB500 PSB785 PSB830 PSB930 PSB1080 Steel Rebars

                    P – Prestressing S – Screw-thread B – Bars Screw-thread steel bars for the prestressing of concrete (also known as the finishing rolling rebar or reinforcing rebar) is reinforced straight steel rebar of large diameter with...
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  • How to simulate real tension condition at sight – Anchor Bolt Test During Production

    How to simulate real tension condition at sight – Anchor Bolt Test During Production

    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 anchor...
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  • Private-Owned Companies Now Earn Government Support – Anyang Longteng Heat Treatment Material Co.,Ltd

    Private-Owned Companies Now Earn Government Support – Anyang Longteng Heat Treatment Material Co.,Ltd

    Recently, Chinese central government has continuously held many meetings discussing about the development difficulties and economic pressures, especially for those private enterprises. Many new polices to help private enterprises are soon coming out, some of which are even unprecedented. To help ...
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  • Full Threaded Rock Bolt, Mining Tunnel Application, anchor bolt, FULLY RIBBED BAR

    Full Threaded Rock Bolt, Mining Tunnel Application, anchor bolt, FULLY RIBBED BAR

    Rock bolts are widely used for rock reinforcement in mining and tunneling. Our heat-treated rebars have big advantage on yield strength, tensile strength and pre-stress, which could help to support underground tunnels, roof support. Steel grade:  20MnSi Dia Yield strength MPa Tensile streng...
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  • Chemical Composition of Steel rebars for Resin Rock Bolt

    Chemical Composition of Steel rebars for Resin Rock Bolt

    1. Chemical composition of resin rock bolt rebar shall conform to Table 1. Table 1 Chemical Composition  Element 20MnSi 30MnSi Percentage, % Tolerance Percentage, % Tolerance + - + - C 0.17-0.23 0.02 0.02 0.27-0.34 0.02 0.02 Si 0.40-0.70 0.03 0.03 0.60-0.90 0.03 0.03 Mn 1.30-...
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  • Winter Solstice Day in Anyang Longteng Heat Treatment Material Co.,Ltd

    Winter Solstice Day in Anyang Longteng Heat Treatment Material Co.,Ltd

    On December 22th, it’s the WINTER SOLSTICE in Chinese lunar calendar. There is a saying that if you eat dumplings at the winter solstice day, it won’t freeze your ears off.  It has been a tradition for our company to have a warm dumpling day with every employees. So from the early mor...
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  • Quality Control System for Resin Rock Bolt

    Quality Control System for Resin Rock Bolt

    1. Definition of Procedure Test: is a Quality test on specific procedures of resin rock bolt production except the procedures after packaging steps.   2. Quality tester should perform first inspection on below procedures. Production will continue only with first inspection pass. 2.1 Heat-treatmen...
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  • AISI 4140 QT/SR TGP Alloy Round Bar Manufacturer – Anyang Longteng Heat Treatment Material Co.,Ltd

    AISI 4140 QT/SR TGP Alloy Round Bar Manufacturer – Anyang Longteng Heat Treatment Material Co.,Ltd

    This medium carbon alloy grade is widely used for many general purpose parts requiring high tensile strength and toughness. 4140 contains chromium and molybdenum as alloying elements and may be heat treated over a wide range to give the combined hardness may be required, this steel is readily fla...
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  • How do we inspect Rock Bolt Raw Material ?

    How do we inspect Rock Bolt Raw Material ?

    We’re Anyang Longteng Heat Treatment Material Co.,Ltd, a professional high duty rock bolt manufacturer. Here, we present our raw materials rules. Sharing this is because raw materials are one of the most importance part that catch client’s attention. Besides production process, raw ma...
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  • LT Production Key Process for Rock bolt manufacturing

    LT Production Key Process for Rock bolt manufacturing

    Anyang Longteng Heat Treatment Material Co.,Ltd is a professional manufacture and trading combo for yielding bolt, anchor bolt, rock bolt support system, ductile rock bolt for rock burst applications.   We would like to share the most common production procedure. Please well noted that this is ju...
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