Common Round Bar Cov ntaub ntawv thiab lawv cov ntawv thov
I. Carbon Steel Round Bars (Structural & General Purpose)
1. Q235 / A36 / S235JR / S275JR (Low Carbon / Mild Steel)
Yam ntxwv:Tsawg carbon cov ntsiab lus, zoo heev weldability, thiab siab plasticity nrog lub zog me ntsis. Cov no yog cov khoom siv ntau yam "siv" steels thoob ntiaj teb.
Daim ntawv thov:Kev tsim kho rebar, scaffolding, cov khoom siv dav dav (pins, khi rods), welded structural Cheebtsam, thiab cov phaj hauv paus.
2. 1018 (AISI/SAE Low Carbon Steel)
Yam ntxwv:Ntau dua ductility thiab ua kom tiav (thaum txias-kos). Nws yog yooj yim carburized thiab muab zoo toughness.
Daim ntawv thov:Fixtures, shafts, bushings, thiab qhov yuav tsum tau muaj siab - zoo nto tiav nrog H7–H11 tolerances.
3. 45# / 1045 (Medium Carbon Steel)
Yam ntxwv:Cov ntsiab lus carbon nruab nrab. Nws muaj exceptional kev qhia txhua yam khoom tom qabQuenching thiab Tempering (Q & T)(σb Ntau dua lossis sib npaug rau 600MPa).
Daim ntawv thov:Transmission shafts, gears, bolts, thiab cov cuab yeej siv tshuab. Nws yuav tsum tau cua sov- kho kom ncav cuag qhov ua tau zoo.
II. Alloy Steel Round Bars (High Strength & Toughness)
1. 40Cr / 5140 (Chromium Alloy Steel)
Yam ntxwv:Chromium{0}} bearing alloy steel nrog siab hardenability dua cov qauv carbon steel. Nws tuav zoo toughness tom qab Q&T.
Daim ntawv thov:Txuas pas nrig, crankshafts, siab - lub zog bolts, pwm, thiab tsuas machinery qhov chaw.
2. 42CrMo / 4140 (Chromium-Molybdenum Steel)
Yam ntxwv:Ultra- siab zog alloy steel (σb Ntau dua lossis sib npaug li 1080MPa) nrog rau qhov tsis tshua muaj siab - kub cuam tshuam qhov hnyav thiab siab qaug zog.
Daim ntawv thov:Hnyav- lub luag haujlwm iav shafts, turbine shafts, cov khoom siv roj drilling, thiab hnyav- load axles. Yuav tsum tau quenching + Tempering.
3. 4130 (Chromium-Molybdenum / Chromoly Steel)
Yam ntxwv:Sau tseg rau nws lub zog siab - rau - qhov hnyav piv thiab zoo weldability piv rau 4140. Nws muaj kev qaug zog zoo dua.
Daim ntawv thov:Aerospace Cheebtsam, tsheb kauj vab ncej, yob tawb, thiab welded tubular thav ntawv rau tsheb sib tw.
4. S355JR (High-Lub Zog Tsawg-Alloy / HSLA Steel)
Yam ntxwv:Cov txheej txheem European txheem steel nrog siab tawm los lub zog thiab muaj kev cuam tshuam zoo.
Daim ntawv thov:Heavy structural tswv cuab, txuas hniav, offshore lug, thiab hnyav machinery chassis.
III. Stainless Hlau Round Bars (Corrosion Resistance)
1. 0Cr13 / 410 (Martensitic Stainless Hlau)
Yam ntxwv:Muaj 13% Chromium. Nws muab qhov sib npaug ntawm corrosion kuj thiab siab mechanical zog.
Daim ntawv thov:Chemical li qub, flanges, twj tso kua mis, thiab cov cuab yeej kho mob.
2. 304 / S30408 / 18-8 (Austenitic Stainless Hlau)
Yam ntxwv:Qhov zoo tshaj plaws corrosion kuj thiab kev ua tau zoo heev hauv cryogenic (tsawg-temp) ib puag ncig.
Daim ntawv thov:Petrochemical pipelines, cov khoom siv hluav taws xob, khoom siv hauv hiav txwv, thiab zaub mov- qib chav ua noj.
3. 1Cr18Ni9Ti / 321 (Stabilized Austenitic Stainless)
Yam ntxwv:Ntxiv Titanium ua kom muaj kev tiv thaiv rau intergranular corrosion thiab stability ntawm qhov kub thiab txias.
Daim ntawv thov:High -cov khoom siv ntsuas kub, cov khoom siv hluav taws xob, thiab cov raj kub hloov pauv.
IV. Tool thiab Bearing Steel Round Bars
1. T8 / T10 (High Carbon Tool Hlau)
Yam ntxwv:Cov ntsiab lus carbon siab ua rau siab hardness (HRC Ntau dua lossis sib npaug rau 60) thiab hnav tsis kam tom qab kev kho cua sov.
Daim ntawv thov:Cov cuab yeej txiav, xuas nrig ntaus, saw hniav, thiab cov cuab yeej ua haujlwm ntoo.
2. GCr15 / 52100 (Cov Kabmob Hlau)
Yam ntxwv:Siab carbon{0}}chromium steel. Paub txog siab hardness tom qab quenching thiab tshwj xeeb tiv tauj qaug zog.
Daim ntawv thov:Rolling bearing balls, rollers, thiab precision ntsuas spindles.
V. Lwm Yam Tshwj Xeeb Hlau Round Bars
1. 60Si2Mn / 9260 (Lub caij nplooj ntoos hlav hlau)
Daim ntawv thov:Automotive nplooj springs, valve springs, thiab shock absorber springs vim nws siab elastic txwv.
2. Siab-Speed Steel (HSS) (piv txwv li, W6Mo5Cr4V2 / M2)
Daim ntawv thov:Laum cov khoom, milling cutters, thiab cov cuab yeej txiav kev lag luam uas tuav cov hardness ntawm kev ua haujlwm siab.
Technical Selection Criteria (Cov Lus Qhia Tshwj Xeeb)
Yuav tsum muaj zog:Rau cov khoom hnyav lossis siab - cuam tshuam ib puag ncig, ua qhov tseem ceebAlloy Steels (e.g., 4140, 42CrMo, 4130).
Corrosion Resistance:Rau kev ua tshuaj lom neeg lossis chaw ua dej hiav txwv, xaivStainless hlau (304, 316, lossis 410).
Tus nqi -Kev ua tau zoo:Rau cov qauv qauv qhov chaw uas lub zog siab tsis tseem ceeb, sivQ235, A36, lossis S235JR. Rau precision mechanical qhov chaw, sivCov cuab yeej Steels.
Txheej Txheem:
Txias-Drawn Round Barsyog zoo tagnrho rau precision shafts vim nruj tolerances.
Kub- Rolled Round Barsfeem ntau yog siv los ua qhov blanks rau loj forgings los yog kev tsim kho reinforcements.
Xaus:Xaiv cov khoom tsim nyog raws li kev ua haujlwm tshwj xeeb (kub, siab, corrosive media) thiab cov txheej txheem ua haujlwm (welding, machining, heat treatment) ua kom muaj kev sib npaug zoo ntawm kev ua haujlwm thiab tus nqi- ua haujlwm tau zoo.
