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We produce gear steel of cold drawn steel bar, turned, ground and polished bright steel bar, annealed steel bar, normalized steel bar, quenched and tempered steel bars. Major steel grades include: 20CrMnTi, 20CrMoH, 20CrMnH, 20CrNiMoH, 18CrMnBH in GB standard SAE4118H, SAE8620H, SAE4320H, SAE8720H in ASTM standard 16MnCr5, 20MnCr5H, 20NiCrMo2H in EN standard SCM415H, SCM420H, SNCM420H, SCM440H, SCM822H in JIS standard And other steel material such as 25MoCr4, SAE5120H, SAE8620H(S), ZF6, ZF7, ZF7B etc.

Bearing steel bar is used to produce all kinds of bearings such as needle bearings or ball bearings which is widely used in auto parts, machinery parts, CNC machines etc. The typiecal steel grades: GCr15, GCr15SiMn, G20CrNiMo, G20CrNi2Mo, G418Mo in GB standard. 52100 and SAE4320 in ASTM standard. 100Cr6, 100CrMnSi6, 20NiCrMo2 in EN standard SUJ2, SUJ3, SNCM420 in JIS standard. And some others teel grades such as SKF3, SKF4, SUJ2S1, 100CrMnSi6-4, SKF6, SKF7, SKF8, SKF5, S53CG, C56E2, SKF255 etc. We aminly produce cold drawn, peeled, ground and polished bearing steel bars and annealed, normalized, quenched and tempered steel round bar.

The major spring steel bars steel grades are as following: GB standard: 60Si2MnA, 55CrMnA, 60CrMnA, 50CrVA, 60CrMnA ASTM standard: SAE5155, SAE 5160, SAE6150, 51B60H EN standard: 55Cr3, 50CrV4, 52CrMoV4 JIS standard: SUP9, SUP9A, SUP10, SUP11A Others: 38Si7, SUP9N, 51CrV4, 60Si2CrVAT, 51CrMoV4 We can do cold drawing, turning, grinding and polished on the steel bars to supply cold drawn steel bar and bright steel bars. We can also do annealing, normalizing, quenching and tempering to get higher strength. Dias are mainly from 10mm to 100mm for hot rolled steel bars. (5-50)mm*(44-150)mm for flat steel bar, 4.5mm to 52mm for steel coils.

Typical Steel materials of steel round billets which is used to produce steel tubes: GB DIN JIS ASME/ASTM EN Others 15MoG St35.8 STBA 410 SA-210A1 P235GH T2 20MoG 15Mo3 STBA 12 SA-210C 16Mo3 T12 12CrMoG 13CrMo44 STBA 13 SA-192 13CrMo4-5 T11 15CrMoG 10CrMo910 STBA 20 SA-213 T91 10CrMo9-10 T22 12Cr1MoVG 14MoV63 STBA 22 SA-213 T92 X10CrMoVNb9-1 T23 12Cr1MoVG 34CrMo4 STBA 24 T91 16Mo3 STBA 26 T92 12Cr2MoG

H13(4Cr5MoSiV1), H11, 5CrNiMo etc. tool steel and mould steel are produced by eletric furnace or conveter furnace, LF, VD, CC or mould casting, the do RH to get high purity, good microstructure and mechanical properties. The typical steel materials are as following: GB standard: 4Cr5MoSiV1, W6Mo5Cr4V2, CrWMn, 4Cr5MoSiV, 9SiCr, 5CrNiMo, Cr12, 5CrMnMo, Cr12Mo1V1, 3Cr2W8V, ASTM standard; D2, H11, H13, P20, JIS standard; SKD11, SKD5, SKD6, SKD61, EN standard: 1.2344, 1.2379, XB521, 718, Customized: XB8407, XB8418 Bright steel bar dias is from 10mm to 300mm Forged round steel bar dias from 100mm to 950mm Hot rolled steel round bar dias from 10mm to 120mm Forged square bar or blocks sizes from (80mm-800mm)*(200mm-1500mm)

We can supply big mill's steel bar used to produce chain with CCS, LR, GL, DNV, ABS, NK, KR. We cab also do cold drawing, peeling, grinding, polishing, annealing, normalizing and quenching and tempering processing on the steel bars to get more precision size, good surface, stable mechanical properties etc. The typical steel materials are M30Mn2, 22MnCrNiMo, R30Mn2, YXR4, 28MnCrMo, YXR3S, YXR4S, YXR5S. The steel material are produced by LF, VD. CC, high precision continuous rolling and annealing with high precision size, low gas content, high purity, uniform microsturcture, stable mechanical properties etc. Diameters from 10mm to 160mm for hot rolled steel bar; 120mm to 600mm for forged steel bar; 4.5mm to 52mm for steel coils. Delivery conditions are hot rolled, annealed or bright steel bar.

Oil Drilling Steel Bar Steel Materials mainly includes AISI4145H, AISI4137H, SAE 4145 HM, SAE4137HM, 37CrMnMoA, SAE4340, SAE4130 etc. Delivery conditions: hot rolled, cold drawn, nromalized, annealed, Q&T or bright steel bar. Dias from 10mm to 250mm for hot rolled steel bar. 100mm to 950mm for forged steel bar. 80mm to 200mm for square steel bar.

Freet Cutting steel bar without Q&T is one kind of free cutting steel bar with good machinabilities but no need to be quenched and tempered. It is widely used as aoto parts, machineries and CNC machining. The usage includes shafts, connect rods, camshaft etc. The major materials of this kind of steel bars are: YF40MnV, YF35MnV, 30MnVS, 30MnVS6, 38MnVS, 30MnVS5, 38MnVS6, TL1438, 48MnV etc. Dias from 10mm to 300mm. Delivery condition: hot rolled, cold drawn, normalized, annaled, peeled etc.

Our factory produces high quality alloy structural steel bars with good mechanical properties and machinabilities which is widely used to produce various mechant parts, metal products, auto parts, heavy machineries and all kinds of fasteners. The major steel materials are: GB standard steel materials: 20CrMo, 30CrMo 35CrMo, 42CrMo, 40CrNiMo, 20CrNiMo, 20Cr, 40Cr etc. ASTM standard steel materials: SAE4118, SAE4120, SAE4135, SAE4130, SAE4140, SAE8620, SAE 4340, SAE5120, SAE5140 etc. EN standard: 41Cr4, 42CrMo4, 34CrNiMo6, 18CrNiMo6, 17CrNiMo7-6 etc. JIS standard: SCM420, SCM440, SCR420, SCR440 etc.

Cold Heading Steel Bar is used to produce standard fasteners, bolts, screws, nuts etc. Our factory mainly produces high strength cold heading steel bars with steel grade ISO 898 garde 8.8 , grade 10.9, grade 12.9; ASTM F1554 Grade 55, Grade 105; ASTM A193 Grade B7, B16 etc. The used raw materials includes A105, S355JR, 41Cr4(5140, SCr440), C45( S45C, 1045), 42CrMo4(SCM440, 4140 etc), 34CrMo4(4135, SCM435) etc. The cold heading steel bar are produce by LF+ VD/RH + CC + Q&T which has high precision size, good surface quality, less gas content, high purity and stable mechanical properties. Dias are from 8mm to 100mm. Length is up to 12000mm.

1000 pieces of bright steel bar production per day We produce thousands of tg&p bright steel bars recently for our customers who use the steel bars for shafts, CNC machines, Fitness coating etc. TG&P bright steel bar is more and more popular because they can help end user to save wast and time, to improve the work efficiency and to save direct cost. TG&P steel bars are turned, peeled or cold drawb, centerless ground and polished bright steel round bars with precision diameter tolerance, good straightness and surface roughness. The major steel materials include 1045, 4140, 4130, 4150, 4340, 5140, 52100 etc or 42CrMo4, 42CrMoS4, C45, 41Cr4, 18CrNiMo, 34CrNiMo6 etc. In most occassion, the steel bar need to be Q&T, quenched and tempered to get good mechanical properties. The diameter tolerance of tg&p steel bar can be reached 0.02mm max, straightness 0.2mm/m, surface roughness 0.4um max and ovalty 0.015mm. All the datas are tested by precision measurement tools. It can be directly used for CNC machines to produce merchant steel bar and do surface costing etc.

Wear Resistant Bright Steel Round Bar I am sure that you are familiar with wear resistant steel plate. But do you know more about wear resistant steel round bar? Shandong Le Ren Special Steel Co., Ltd. produce wear resistant steel round bar which has high strength to withstand high wear and stress. Except heat treatment, we also do stress relieving to improve the strength and uniform the hardness from surface to center. In this way, you can get higher strength in center and not so high hardness are surface. Using wear resistant steel bar, you can extend your machine components using time. Except better mechanical properties, we produce turned, ground and polished bright steel round bars with precision diameter tolerance and bright surface which you can do hard chrome or other coating direcelt. In this way, you will use the components for longer time no matter the inner or outer quality. If you are a manufacturer of shafts, components, fasteners, fitness equipments, rollers etc, you will need the wear resistant bright steel round bars. 30HRC to 50HRC hardness are for your choice.

Various Steel Bar Delivery Condition During steel bar purchasing, you may meet some letters which represent abbreviations of various delivery condition. We introduce some of them for you here: +A ( 42CrMo4+A, 41Cr4+A, C45+A, 18CrMo4+A, 18CrNiMo6+A, 34CrNiMo6+A steel bar) , Soft Annealed +AC ( 42CrMo4+AC, 41Cr4+AC, C45+AC, 18CrMo4+AC, 18CrNiMo6+AC, 34CrNiMo6+AC steel bar, 52100+AC) , Annealed to achieve spheroidization of the carbides +AR ( 42CrMo4+AR, 41Cr4+AR, C45+AR, 18CrMo4+AR, 18CrNiMo6+AR, 34CrNiMo6+AR steel bar, 52100+AR) As rolled +AT( 42CrMo4+AT, 41Cr4+AT, C45+AT, 18CrMo4+AT, 18CrNiMo6+AT, 34CrNiMo6+AT steel bar, 52100+AT) Solution annealed +C( 42CrMo4+C, 41Cr4+C, C45+C, 18CrMo4+C, 18CrNiMo6+C, 34CrNiMo6+C steel bar, 52100+C) Cold drawn / hard +CR Cold rolled +FP Treated to ferrite-pearlite structure and hardness range +I Isothermal annealing +LC Cold drawn / soft +M Thermo mechanical rolling +N( 42CrMo4+N, 41Cr4+N, C45+N, 18CrMo4+N, 18CrNiMo6+N, 34CrNiMo6+N steel bar) Normalized +NT Normalized and tempered +P Precipitation hardened +PE (42CrMo4+PE, 41Cr4+PE, C45+PE, 18CrMo4+PE, 18CrNiMo6+PE, 34CrNiMo6+PE steel bar) Peeled +QA Air quenched and tempered +QL Liquid quenched and tempered +QT (42CrMo4+QT, 42CrMoS4+QT, 41Cr4+QT, C45+QT, 18CrMo4+QT, 18CrNiMo6+QT, 34CrNiMo6+QT steel bar) Quenched and tempered +S Treated to improve shearability +SH(42CrMo4+SH, 42CrMoS4+SH, 41Cr4+SH, C45+SH, 18CrMo4+SH, 18CrNiMo6+SH, 34CrNiMo6+SH steel bar) As rolled and turned +SR Cold drawn and stress relieved +T Tempered +TH Treated to hardness range +WW Warm worked +U Untreated

Cold Drawn Steel Bar Tolerances Cold drawn steel bar has more precision diameter tolerances. The tolerance is as blow. If you want more precision diameter tolerances, we can do grinding on steel bar which can reach 0.02mm tolerance, Ra 0.8um max surface roughness and 0.2mm/m straightness. Diameter Permitable Tolerance Level 8 9 10 11 12 13 h8 h9 h10 h11 h12 h13 Tolerances 3 0/-0.014 0/-0.025 0/-0.040 0/-0.060 0/-0.15 0/-0.14 >3~6 0/-0.018 0/-0.030 0/-0.048 0/-0.075 0/-0.12 0/-0.18 >6~10 0/-0.022 0/-0.036 0/-0.058 0/-0.090 0/-0.15 0/-0.22 10~18 0/-0.027 0/-0.043 0/-0.070 0/-0.110 0/-0.18 0/-0.27 18~30 0/-0.033 0/-0.052 0/-0.084 0/-0.130 0/-0.2l 0/-0.33 30-50 0/-0.039 0/-0.062 0/-0.100 0/-0.160 0/-0.25 0/-0.39 50~80 0/-0.046 0/-0.074 0/-0.120 0/-0.190 0/-0.30 0/-0.46

Cold Drawn Steel Bar Process Cold drawn steel bar has different production and processing flow based on different steel material. There are mainly two kinds processing: Carbon and low alloy steel round bar: Hot rolled steel round bar or steel wire rod - peeling or shot blasting - cold drawing - straightening - inspection - end cutting - chamfering - packing High alloy steel round bar: Hot rolled steel round bar or steel wire rod - annealing - cold drawing - straightening - inspection - end cutting - chamfering - packing

what is cold drawn steel material? Cold drawn steel bar raw amterial is usually hot rolled steel bar or steel wire rods. For diameters below 16mm, hot rolled steel wire rod is mostly used because the production effciency and pass percentage is higher, so the price us relatively more competitive. For diameters above 16mm, hot rolled steel round bar is more used because the wire rod is rare if less quantity. What kind of steel material can be cold drawn? In general, most steel materials can be cold drawn, for example, carbon steel material, alloy steel material, bearing steel material, spring steel material, free cutting steel material, stainless steel material etc. But for alloy steel materials, most will be annealed to decrease the hardness before cold drawing. The most popular cold drawn steel material includes SS400, A36, S235JR, S355JR, 1020, S20C, C22, C15, S30C, S35C, 1030, 1035, 1040, 1045, S45C, C45, CK45, 1050, 1055, 41Cr4, 40Cr, SCr440, 42CrMo4, 42CrMos4, scm440, 4140, 4130, 4135, 4120, 8620, 52100, 4340, 1214, 12L14, 1215, 11SMnPb etc.

What is cold drawn steel bar? Cold drawn steel bar is produced by hot rolled steel bar or steel wire rod through various moulds with different shapes and dimensions. It is kind of cold finished steel bar. Different from other cold finished steel bar such as peeled or turned steel bar, cold drawn steel bar can not only change the dimenions and shapes, but also can change the mechanical properties. And cold drawn steel bar production effiency and pass percentage is higher, so it is easily chosen by end manufactuers of machinery and automotive components. Shandong Le Ren Special Steel Co., Ltd. produces all kinds of cold drawn steel bars such as cold drawn steel round bar, cold drawn square steel bar, cold drawn hexagonal steel bar, cold drawn flat steel bar and other cold drawn special steel profiles according to your drawing.

why is cold drawn steel stronger? Do you feel cold drawn steel bar stronger than hot rolled steel bar or peeled, turned bright steel bar? cold drawn steel bar is stronger because the tensile strength, yield strength and hardness are higher than hot rolled steel bar. Steel bar through cold drawing can not only change the diameters, surface, but also change the mechanical properties. Because cold draw steel bar is produced bu cold drawing through a mound, during drawing, the steel bar is squeezed to change the shape or size, so the hardness is higher and you feel steel bar is stronger. Is steel bar stronger better than steel bar softer? That depends on your usage. For example, if you produce high strength components, then stronger steel bar is better. But if you want them easy maching, lower hardness steel bar is better. Is there steel bar with higher strength and lower hardness, good elongation? Yes, heat treated steel bar can solve all problems to supply you most suitable usage. If you want steel bar solution, contact Shandong Le Ren Special Steel Co., Ltd. We are a professional factory to supply you what you want.

Why is steel bar cold drawn? We know steel bar has many kinds of condition such as hot rolled steel bar, cold drawn steel bar, forged steel bar and heat treated steel bar. Do you know why is steel bar cold drawn? Steel bar is cold drawn because the end user need more precision diameter, higher tensile strength and better surface. Cold drawn steel bar can not change the diameters, it also changes the mechanical properties, especially tensile strength and yield strength. But cold drawn steel bar elongation will be reduced by cold drawing. Taking 1045 steel material for example, 1045 hot rolled steel bar tensile strength is about 600MPa, Yield strength about 380MPa, Elongation about 16% to 20%. After cold drawing, both yeild strength and tensile strength can be more than 100MPa higher. Elongation may reduce 5 to 10% according to different hot rolled condition. If you want to guarantee the mechanical proeprties for cold drawn steel bar. It is better to do heat treatment to get your preferable and sutable usage. Therefore, when you choose the steel bar, telling your end usage for the bar is more important. When you are not sure which kind of steel bar condition you need, Shandong Le Ren Special Steel Co., Ltd can supply you good steel solutions, steel bar suitable for your uage at most competitive steel price.

High-strength prestressed anchor bolts are used in places with harsh environments. They have to pass the test of severe winter and heat. On the premise that the mechanical properties of the product meet the requirements, they must also meet the requirements of low-temperature impact toughness and surface treatment salt spray test. Mechanical performance requirements of wind power bolts Among them, quenching and tempering heat treatment is the key to the process; the company is committed to high-performance heat treatment of various steels to ensure the accuracy and consistency of product performance.