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  • Pre-stressed Grout Rock Bolt Advantages – Anyang Longteng Heat Treatment Material Co.,Ltd

    Pre-stressed Grout Rock Bolt Advantages – Anyang Longteng Heat Treatment Material Co.,Ltd

    Anyang Heat Treatment Material Co.,Ltd manufacture prestressed threaded bar-Rock anchor bolts. Threaded bar bolt is composed of screw thread steel bar, high strength washer plate, casting damping nut, yield tube and other accessories. According to the structure, bolt has two types: rib rebar bolt...
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  • What is ROCK BOLT?

    What is ROCK BOLT?

    A Rock Bolt is a long anchor bolt, for stabilizing rock excavations, which may be used in tunnels ro rock cuts. It transfer load from the unstable exterior to the confined interior of the rock mass.                As shown in the figure, rock bolts are almost a...
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  • Onshore Wind Turbine Foundation Foot Steel Grade and equivalents

    Onshore Wind Turbine Foundation Foot Steel Grade and equivalents

      Commodity Steel Grades and Standards Class property Wind Tower Foundation Anchor bolt(Cold Rolled Thread) 42CrMoA GB/T 1231-2006 35CrMoA GB/T3098.1-2000 ISO 4014 ASTM A615/A615M Grade55,60,70,75 ASTM A722/A722M ASTM A193/A193M Grade B7 Grade 8.8 Grade 10.9 Grade 12.9 Hardware...
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  • How much wind was in Europe’s electricity?

    How much wind was in Europe’s electricity?

    Europe is a global leader in wind energy. According to the date from the WIND EUROPE,  wind energy was almost 20% of Europe’s electricity on Sunday. 67% in Portugal, and more than 20% in Spain,Ireland, Germany, Lithuania, Sweden,Estonia. Last year wind energy covered 11.6% of EU power deman...
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  • Anchor Bolts for Brick Masonry

    Anchor Bolts for Brick Masonry

    Anchor bolts are used in brick masonry extensively to make structural attachments and connections. To date, a limited amount of information has been available to aid designers in the selection and design of anchor bolts in brick masonry. This technical notes addresses the types of anchor bolts av...
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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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  • Fine Grinding+ Thread Rolling Process-Produce high strength anchor bolt (Decription & Vedio)

    Fine Grinding+ Thread Rolling Process-Produce high strength anchor bolt (Decription & Vedio)

    Fine Grinding:                                                                                                                                                         Grinding the front end, make sure that after the thread is formed, the thread accuracy should be 6g.   Rod Diameter          ...
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  • Underground Mining Tunnel High Strength Rock Anchor bolt

    Underground Mining Tunnel High Strength Rock Anchor bolt

    Underground Mining Tunnel High Strength Rock Anchor Bolt is a self drilling rock grouting anchor, is a bolting solution for unstable ground conditions such as sand, gravel, silt, and clays, and in soft to medium fractured rock formations. Our anchor bolts/rock bolts consists of anchor but, anchor...
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  • Steel Plates standard and grades from LT

    Steel Plates standard and grades from LT

    We are dealing below steel grades and standards: 1.Abrasion/Ballistic Steel;HARDOX400, HARDOX450, HARDOX500, XAR400-500, raex400, raex450, raex500, DILLIDUR400V, DILLIDUR500V, QUARD400, QUARD500, FORA400, JFEEH360, JFEEH400, JFEEH500, FORA500, CREUSABRO4800, CREUSABRO8000 2.Wear resistant s...
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  • Equivalent standard and grade of abrasion/wear resistant steels

    Equivalent standard and grade of abrasion/wear resistant steels

    Steel Standard Steel Grades Sweden HARDOX400 HARDOX450 HARDOX500 HARDOX600 SB-50 SB-45 Germany XAR400 XAR450 XAR500 XAR600 Dillidur400V Dillidur500V China NM360 NM400 NM450 NM500     Finland RAEX400 RAEX450 RAEX500       Japan JFE-EH360 JFE-EH450 JFE-EH500 WEL-HARD400 WEL-HARD500...
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  • Pre-Thread Diameter

    Pre-Thread Diameter

    This chart apply for our threaded round bar products, and fastener products, for example anchor bolts, rock bolts, stud bolts, anchor cages. If any doubt or questions, our engineers are always pleased to help. infor@aylttg.com Pre-Thread Diameter             Unit:mm Norminal Diam...
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  • Machanical rock anchors

    Machanical rock anchors

    Most popular mechanical anchor system is expansion shell anchors. A hole is drilled in the rock and the rock bolt assembly is inserted. Then the tensile force(P) is applied. When the force is applied, the cone would try to move to the right side. The movement of the cone would expand the two wedg...
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  • Rock bolt For Mining/ Tunnel/ Slop Support

    Rock bolt For Mining/ Tunnel/ Slop Support

    Name Rock bolt For Mining/ Tunnel/ Slop Support Specifications  Specification & Standard GB/T 20065-2006  MT 146.2-2011 YB/T4363-2014 ISO6934-5:1991 Dn 16-32mm Rp0.2/MPa 500-800 Rm/MPa 500-1000 A% 15-22 Material High-performance steel AKv/J...
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  • DIN EN 10278 1999 Dimensions and tolerances of bright steel products Part 2

    DIN EN 10278 1999 Dimensions and tolerances of bright steel products Part 2

    5. Condition of delivery 5.1 Finished condition The steel product shall be delivered in one or combination of the following finished conditions with or without heat treatment: a) drawn, symbol +C; b) turned, symbol +SH; c) ground, symbol +SL; d) polished, symbol +PL. 5.2 End condition Unless othe...
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  • DIN EN 10278  1999 Dimensions and tolerances of bright steel products

    DIN EN 10278 1999 Dimensions and tolerances of bright steel products

    European standard EN 10278:1999 has the status of a DIN Standard, Previous editions DIN 174 DIN 175 DIN 176 DIN 178 DIN 668 DIN 671 DIN59360 DIN 59361 1. Scope  This European Standard applies to bright steel products in the drawn, turned or ground condition delivered in straight lengths. It doe...
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  • INCOMING INSPECTION STANDARD FOR NUTS

    INCOMING INSPECTION STANDARD FOR NUTS

     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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  • Depth of Decarburization – Wind Turbine Foundation Anchor Bolt Inspection in Anyang Longteng Heat Treatment Material Co.,Ltd

    Depth of Decarburization – Wind Turbine Foundation Anchor 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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  • Marking and Packaging Details for anchor bolt products

    Marking and Packaging Details for anchor bolt products

      Anchor bolts must be marked according to regulations, including:   a) manufacturer identifiable mark b) steel grade   Figure  Marking on anchor bolts   Packaging a)Packaging boxes shall be secure and moisture-proof and mixed storage of different batches of products are not permitted.handling re...
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  • LT-Acceptance inspection requirements of anchor bolts tensioning

    LT-Acceptance inspection requirements of anchor bolts tensioning

    1 Sampling ratio of acceptance inspection:inadequate tension inspection shall take 20% sampling of flange anchor bolts, if once test fails, sampling rate shall be expanded to 50% . If more than 5% of these 50% tests fail, all flange anchor bolts shall be re-tensioned and re-tightened. exceeding t...
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  • LT ——Inspection standard of key procedure for high- strength heat-treated anchor bolt

    LT ——Inspection standard of key procedure for high- strength heat-treated anchor bolt

    1、HEAT TREATMENT PROCEDURE INSPECTION热处 1.1 Heat-treatment procedure inspection refers to tests on steel round bars, in the duration of heat treatment production line, which, mechanical properties, hardness, impact absorb energy at low temperature tests are the mainly part. 3.2 Sampling: accor...
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  • Dimension and tolerances of NUTS and Washers – Wind tower foundation anchor bolt _ Anyang Longteng

    Dimension and tolerances of NUTS and Washers – Wind tower foundation anchor bolt _ Anyang Longteng

    Dimension and tolerance inspection shall be in accordance with GB/T6170-2000 “Hexagon regulat nuts(style 1)”. See Table 3 thickness m is symboled and described. Table 3 Thickness of nuts Specification of nuts M30 M36 M42 M48 M56 M64  P 3.5 4 4.5 5 5.5 6 Q/AYLT 06-201...
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  • INSPECTION STANDARD FOR APPEARANCE INSPECTION OF RAW MATERIALS—WIND TURBINE FOUNDATION ANCHOR BOLTS

    INSPECTION STANDARD FOR APPEARANCE INSPECTION OF RAW MATERIALS—WIND TURBINE FOUNDATION ANCHOR BOLTS

      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 ...
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  • Inspection Standard for Raw Materials—Wind turbine foundation anchor bolts

    Inspection Standard for Raw Materials—Wind turbine foundation anchor bolts

    Raw materials for steel anchor bolt are grade 35CrMoA, 42CrMoA hot-rolled round bars. After stock in, within a specified time, re-test shall be performed according to following requirements. Arrange production schedule after qualification. 1.CHEMICAL COMPOSITION Retest results shall conform to ta...
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  • High strength anchor bolt assembly components-Nut,washer technical requirements _—— LT

    High strength anchor bolt assembly components-Nut,washer technical requirements _—— LT

    1.SCOPE  This standard specified the technical and test regulations for high duty anchor bolts components- nuts and washers, and technical requirements for marking, packaging, transportation, storage, production process and quality assurance control. This standard is applicable to the external pr...
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