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Aluminium 7075-T651 vs 7075-T6: Txheej txheem, Khoom, thiab kev siv

Dec 31, 2025

 

Nyob rau hauv ntau yam ntawm aluminium alloys,7075 aluminium phajtau lees paub rau nws qhov kev ua tau zoo tag nrho. Ua tsaug rau nws lub zog siab, kev qaug zog zoo heev, thiab kev ntseeg siab, nws tau siv dav hauv kev lag luam nrog cov khoom xav tau, suav nrogaerospace, automotive manufacturing, thiab precision mechanical processing.

Ntawm cov tempers muaj,7075-T6 thiab 7075-T651yog ob yam uas feem ntau teev tseg. Txawm hais tias lawv sib koom tib lub hauv paus alloy, qhov sib txawv ntawm cov txheej txheem kho cua sov ua rau cov yam ntxwv ntawm kev ua tau zoo thiab kev siv tau zoo.

Raws li tus kws tshaj lij aluminium tsum,GNEEmuab ob qho tib si 7075-T6 thiab 7075-T651 txhuas cov khoom kom tau raws li kev xav tau ntawm kev lag luam.

 

Kev sib piv ntawm kev kho cua sov

7075-T6 Cov txheej txheem kho cua sov

Cov7075-T6 kev kub ntxhovyog ua tiav los ntawm ob kauj ruam tseem ceeb:tshuaj kho cua sovthiabdag dag.

Kev kho cua sov
Lub 7075 aluminium alloy yog rhuab mus rau qhov kub thiab txias, feem ntau480-490 degree,thiab tuav tau rau lub sijhawm uas tau hais tseg. Thaum lub sij hawm no, alloying ntsiab xws li zinc, magnesium, thiab tooj liab tag nrho yaj mus rau hauv lub txhuas matrix, tsim ib tug uniform khoom tov. Cov kauj ruam no muab lub hauv paus rau lub hnub nyoog tom ntej hardening thiab muab cov alloy zoo plasticity rau kev ua haujlwm ntxiv.

Artificial laus
Tom qab kev daws teeb meem, cov khoom siv sai sai quenched hauv dej, ces hnub nyoog ntawm qhov kub thiab txias, feem ntau120-130 degree,rau ncua sij hawm. Thaum lub sij hawm laus, ntxiv dag zog rau theem- feem ntauMgZn₂ dej nag- daim ntawv maj mam los ntawm cov tshuaj supersaturated. Cov txheej txheem zoo li no, cov txheej txheem dispersed inhibit dislocation txav, ua kom muaj zog thiab hardness.
Ib tug raug T6 aging voj voog yogCi 120℃rau li 24 teev, tom qab ntawd lub zog tensile ntawm 7075 txhuas tuaj yeem ncav cuagNtau dua lossis sib npaug li 530 MPa, nrog lub zog tawm losNtau dua lossis sib npaug li 470 MPa.

 

7075-T651 Kev kho cua sov txheej txheem

Cov7075-T651 kubua raws tib txoj kev kho cua sov zoo li T6 tab sis suav nrog ib qho ntxivua ntej- kev ua haujlwm ncab, uas yog qhov tseem ceeb sib txawv ntawm ob tempers.

Kev kho mob thiab kev laus kev laus
Cov kauj ruam no zoo ib yam rau T6 txheej txheem, ua kom lub zog siab los ntawm kev tswj cov nag lossis daus hardening.

Ua ntej -stretching (kev nyuaj siab nyem) kho
Tom qab aging, cov khoom yog mechanically stretched los tsim ib tug mus tas li deformation ntawm kwv yees li1.5–3%. Qhov kev tswj kev ncab no ua tau zoo txo ​​cov kev ntxhov siab sab hauv uas tau tsim thaum lub sij hawm kho thiab kev laus, thaum tseem txhim kho kev ntxhov siab hauv cov khoom siv.

Cov txheej txheem ua ntej -stretching pab txhawb kom ib tug zoo li microstructure thiab txhim khu kev qhaseem stability, uas yog ib qho tseem ceeb tshwj xeeb rau cov phaj tuab thiab precision - cov khoom siv tshuab.

Yog li ntawd, residual stress theem nyob rau hauv7075-T651feem ntau yog txo rauqis dua 50 MPa, whereas residual stresses in untreatedT6cov khoom yuav ncav cuag200-300 MPa.

 

Qhov txawv ntawm 7075-T651 thiab 7075-T6

Qhov sib txawv ntawm kev kho cua sov

7075-T6: Kev kho cua sov + kev laus kev laus

7075-T651: Kev kho cua sov + kev laus kev laus + ua ntej- ncab

Qhov ntxiv ua ntej -stretching kauj ruam hauv T651 yog qhov sib txawv ntawm qhov tseem ceeb thiab cuam tshuam ncaj qha rau kev ua haujlwm ntawm lub tshuab, kev faib tawm kev ntxhov siab, thiab kev coj tus cwj pwm.

 

Qhov txawv ntawm Mechanical thiab Physical Properties

Zuag qhia tag nrho,7075-T651 muaj kev sib npaug ntau dua, thaum7075-T6 muab lub zog siab dua me ntsis.

Lub zog:
T6 feem ntau nthuav tawm marginally siab tensile thiab yield zog tshaj T651. Txawm li cas los xij, kev txhim kho kev ntxhov siab ntawm T651 feem ntau ua rau muaj kev ua tau zoo dua hauv kev ua haujlwm tiag tiag.

Toughness:
7075-T6 feem ntau qhia zoo dua toughness piv nrog T651.

Kev ntxhov siab corrosion kuj:
Ua tsaug rau txo cov kev ntxhov siab sab hauv,7075-T651ua tau zoo nyob rau hauv cov nqe lus ntawm tsis kam mus rau kev nyuaj siab corrosion cracking.

Machining thiab kev ua tau zoo:
Lub xeev kev ntxhov siab tsawg ntawm T651 txo qis deformation thaum lub sij hawm machining, cia siab dua precision thiab zoo dua dimension tswj piv nrog T6.

 

Qhov txawv ntawm Daim Ntawv Thov Scenarios

7075-T6 txhuas
Zoo tshaj plaws rau kev siv qhov twglub zog siab tshaj plaws yog qhov tseem ceeb tshaj plaws, thiab qhov tseeb qhov tseeb lossis deformation tswj yog qhov tseem ceeb tsawg.

7075-T651 txhuas
Ntau haum rauprecision Cheebtsamuas xav tau kev ruaj ntseg ruaj khov, txhim kho kev nyuaj siab corrosion, thiab txhim khu kev qha kev ua tau zoo nyob rau hauv kev ntxhov siab, tshwj xeeb tshaj yog nyob rau hauv cov phaj tuab thiab complex machining daim ntaub ntawv.

 

Xaiv Ntawm 7075-T651 thiab 7075-T6

Thaum xaiv ntawm ob tempers no, engineers thiab buyers yuav tsum xav txog tsis tau tsuas yog nominal zog qhov tseem ceeb tab sis kujmachining raug, kev tswj kev ntxhov siab, qhov chaw ua haujlwm, thiab kev cia siab ntev -.

Nrog kev paub dhau los hauv siab -lub zog aluminium alloys,GNEEmuab ob qho tib si 7075-T6 thiab 7075-T651 txhuas daim hlau, nplooj ntawv, thiab tuav nrog kev ua haujlwm zoo thiab ruaj khov, txhawb kev siv thoob plaws aerospace, tsheb, cuab yeej, thiab precision manufacturing industries.

Aluminum 7075-T651 vs 7075-T6: Process, Properties, and Applications Within the wide range of aluminum alloys, 7075 aluminum plate is recognized for its outstanding overall performance. Thanks to its high strength, excellent fatigue resistance, and reliability, it is widely used in industries with demanding material requirements, including aerospace, automotive manufacturing, and precision mechanical processing. Among the available tempers, 7075-T6 and 7075-T651 are the two most commonly specified conditions. Although they share the same base alloy, differences in heat treatment processes result in distinct performance characteristics and application advantages. As a professional aluminum supplier, GNEE provides both 7075-T6 and 7075-T651 aluminum products to meet diverse industrial needs. Heat Treatment Process Comparison 7075-T6 Heat Treatment Process The 7075-T6 temper is achieved through two primary steps: solution heat treatment and artificial aging. Solution heat treatment The 7075 aluminum alloy is heated to a specific temperature range, typically 480–490 °C, and held for a defined period. During this stage, alloying elements such as zinc, magnesium, and copper fully dissolve into the aluminum matrix, forming a uniform solid solution. This step provides the foundation for subsequent age hardening and gives the alloy good plasticity for further processing. Artificial aging After solution treatment, the material is rapidly quenched in water, then aged at a relatively low temperature, generally 120–130 °C, for an extended time. During aging, strengthening phases-mainly MgZn₂ precipitates-form gradually from the supersaturated solid solution. These fine, dispersed phases inhibit dislocation movement, significantly increasing strength and hardness. A typical T6 aging cycle is 120 °C for about 24 hours, after which the tensile strength of 7075 aluminum can reach ≥530 MPa, with yield strength ≥470 MPa. 7075-T651 Heat Treatment Process The 7075-T651 temper follows the same basic heat treatment route as T6 but includes an additional pre-stretching operation, which is the key distinction between the two tempers. Solution treatment and artificial aging These steps are identical to the T6 process, ensuring high strength through controlled precipitation hardening. Pre-stretching (stress relief) treatment After aging, the material is mechanically stretched to produce a permanent deformation of approximately 1.5–3%. This controlled stretching effectively relieves internal residual stresses generated during solution treatment and aging, while also improving stress distribution within the material. The pre-stretching process contributes to a more uniform microstructure and significantly enhances dimensional stability, which is particularly important for thick plates and precision-machined components. As a result, residual stress levels in 7075-T651 are typically reduced to below 50 MPa, whereas residual stresses in untreated T6 material may reach 200–300 MPa. Key Differences Between 7075-T651 and 7075-T6 Differences in Heat Treatment 7075-T6: Solution heat treatment + artificial aging 7075-T651: Solution heat treatment + artificial aging + pre-stretching The added pre-stretching step in T651 is the core difference and directly influences mechanical performance, stress distribution, and processing behavior. Differences in Mechanical and Physical Properties Overall, 7075-T651 offers more balanced performance, while 7075-T6 provides slightly higher peak strength. Strength: T6 typically exhibits marginally higher tensile and yield strength than T651. However, the improved stress distribution of T651 often results in better performance under real working conditions. Toughness: 7075-T6 generally shows better toughness compared with T651. Stress corrosion resistance: Thanks to reduced internal stress, 7075-T651 performs better in terms of resistance to stress corrosion cracking. Machining and processing performance: The low residual stress state of T651 minimizes deformation during machining, allowing higher precision and better dimensional control compared with T6. Differences in Application Scenarios 7075-T6 aluminum Best suited for applications where maximum strength is the primary requirement, and dimensional accuracy or deformation control is less critical. 7075-T651 aluminum More suitable for precision components that demand strict dimensional stability, improved stress corrosion resistance, and reliable performance under high stress, particularly in thick plate and complex machining applications. Choosing Between 7075-T651 and 7075-T6 When selecting between these two tempers, engineers and buyers should consider not only nominal strength values but also machining accuracy, residual stress control, service environment, and long-term reliability. With extensive experience in high-strength aluminum alloys, GNEE supplies both 7075-T6 and 7075-T651 aluminum plates, sheets, and bars with consistent quality and stable performance, supporting applications across aerospace, automotive, tooling, and precision manufacturing industries.

 


Tug: Nta ntawm 7075 Aluminium Alloy Khoom
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