ASTM A519 (SA519) 4130 Seamless Carbon & Alloy Steel Tshuab Tubing
ASTM A519 yog tus qauv tshwj xeeb rauseamless carbon thiab alloy steel mechanical tubing. Qhov no npoghollow cylinderstshwj xeeb tsim los machined rau hauvsiab -lub zog mechanical Cheebtsam, tsis yog siv los ua cov kav dej siab rau kev thauj cov dej.
Core Distinction: Mechanical Tubing vs Pressure Pipe
| Feature | ASTM A519 (Tebchaws Mechanical Tubing) | ASTM A335 (Hloov cov yeeb nkab) |
|---|---|---|
| Lub Hom Phiaj | Machined Parts: Shafts, linkages, rollers, aircraft Cheebtsam, sib tw thav ntawv. | Kev xa tawm kua: Siab-kub/siab cov kav dej, txheej txheem kav. |
| Tsim Tsim | Static/Dynamic Mechanical Loads(lub zog-rau- hnyav, qaug zog kuj). | Internal Pressure & Kub(kev nyuaj siab, creep zog). |
| Cov cwj pwm tseem ceeb | Dimensional raug, nto zoo, kev kho cua sov tsis zoo. | Weldability, notch toughness, siab kub zog. |
| Cov Qib Siab | 1020, 1045, 4130, 4140 | P11, P22, P91 |
Qib 4130 Paub meej Specification
Khoom siv: AISI/SAE 4130- Ib qho chromium-molybdenum alloy hlau paub txog nwslub zog zoo heev - rau - qhov hnyav piv, zoo toughness, thiab superior weldability (piv rau 4140). Nws yog qhov kev xaiv zoo tshaj plaws rau qhov hnyav -sensitive applications.
Chemical Composition (Qib 4130):
| Element | Kev sib xyaw (%) |
|---|---|
| Cov pa roj carbon (C) | 0.28 – 0.33 |
| Manganese (Mn) | 0.40 – 0.60 |
| Phosphorus (P), max | 0.035 |
| Sulfur (S), max | 0.040 |
| Silicon (Si) | 0.15 – 0.35 |
| Chromium (Cr) | 0.80 – 1.10 |
| Molybdenum (hli) | 0.15 – 0.25 |
Cov Khoom Siv Hluav Taws Xob (Tom qab Quenching & Tempering):
Cov khoom yog cua sov-kev kho mob nyob ntawm.
| Khoom | Hom Ntau Yam (Q&T Condition) |
|---|---|
| Tensile zog | 670 - 900 MPa (97,000 - 130,000 psi) |
| Yield zog | 460 - 750 MPa (67,000 - 109,000 psi) |
| Elongation (hauv 50mm) | 18% – 25% |
| Hardness | 200-300 HWB |
Common Supply Conditions:
Annealed / Normalized:Rau kev pom zoo machinability ua ntej kev kho cua sov zaum kawg.
Quenched & Tempered (Q&T):Muab rau qhov tshwj xeeb hardness / lub zog ntau yam rau daim ntawv thov npaj.
Cov ntawv thov tseem ceeb
Aerospace:Aircraft engine mounts, tsaws iav Cheebtsam, airframe qauv.
High-Performance Automotive:Dov tawb, chassis tubing, tsav ncej.
Cycling & Racing:Tsheb kauj vab ncej (siab-kawg), maus taus ncej.
General Machinery:Siab -txoj kev nyuaj siab, lub zog, hydraulic lub tog raj kheej rods.
Kws muaj txuj ci & tubrog nkoj:Cov yam ntxwv ntawm cov khoom yuav tsum tau muaj zog, weldable khoom.
Kev sib piv tseem ceeb: 4130 vs . 4140
| Yam | Qib 4130 | Qib 4140 |
|---|---|---|
| Cov ntsiab lus carbon | qis (~0.30%) | Siab dua (~0.40%) |
| Thawj Qhov Zoo | Zoo duaweldability & toughness, lub zog zoo heev -rau- hnyav. | Siab duaqhov kawg lub zog & hnav tsis kam, zoo hardenability. |
| Kev siv yam | Cov qauv & lub moj khaum(qhov twg vuam yog qhov tseem ceeb). | Hnav qhov chaw & siab - cov khoom siv kev ntxhov siab(lub zog, axles). |
| Machineability | Zoo (zoo dua 4140 hauv lub xeev annealed). | Ncaj ncees rau Zoo. |
⚠️ Kev Ceeb Toom Tseem Ceeb: Tsis yog rau Kev Pabcuam Siab
ASTM A519 tubing tsis tsim, kuaj, lossis ntawv pov thawj rau kev pabcuam cov kua dej.
Nws tsis muaj qhov yuav tsum tau uaKev ntsuas siab, kev xav tau NDE dav dav, thiab Charpy cuam tshuam kev simxav tau los ntawm cov lej xws li ASME B31.1 lossis B31.3.
Tsis txhob hloov A519 txhua yam tubing rau cov yeeb nkab siab.Ua li no ua rau muaj kev nyab xeeb tsis muaj kev tswj hwm.
Cov qauv raug rau kev siv siab
Rau cov qauv kev txhawb nqa:ASTM A500 1(structural tubing).
Rau qhov dav dav - lub hom phiaj siab yeeb nkab:ASTM A53los yogAPI 5L.
Rau siab -kub alloy steel yeeb nkab:ASTM A335 Cov Lus Qhia Tshwj Xeeb.
Hauv cov ntsiab lus: ASTM A519 4130 yog tus hwm, weldable, siab - lub zog tshuab raj tsim los rau cov khoom siv tseem ceeb, tsis yog rau cov kua xa tawm hauv qab siab.
