7055 알루미늄 합금

What Is 7055 Aluminum?

7055 aluminum is one of the highest-strength 7xxx series alloys, with very high zinc plus copper, magnesium, and zirconium. It was developed to exceed 7050 and 7075 in compression strength and fatigue performance, especially in thick sections, and is used for the most demanding aerospace structures. The T7751 temper provides an excellent balance of strength and corrosion resistance. Linsy supplies 7055 in plate, tube, bar, and wire with mill test certificates on every order. Composition values below follow the AA standard and should be confirmed against the mill certificate.

Available 7055 Aluminum Products

플레이트

Available tempers: F, O, T6, T651, T7451, H112

성질	두께(mm)	너비(mm)	길이(mm)
F, O, T6, T651, T7451, H112	0.5 – 200	500 – 2600	500 – 16000 (cut-to-length)

튜브

Available tempers: T77, T7751

성질	외경(mm)	벽 두께 (mm)	길이(mm)
T77, T7751	6 – 300	0.5 – 40	500 – 12000

Bar / Rod

Available tempers: T77, T7751

성질	지름(mm)	길이(mm)
T77, T7751	3 – 300	500 – 12000

와이어

Available tempers: T77, T7751

지름(mm)	코일 중량	공차
0.8 – 30	최소 50kg	± 0.02 mm

규격 및 등가 지정

7055 aluminum (EN AW-7055, AlZn8MgCuZr) is supplied to common wrought-alloy specifications. Typical standards by form: ASTM B209 (sheet and plate), ASTM B221 (extruded tube, bar, and profiles), ASTM B211 (bar and rod), ASTM B247 (forging stock), and ASTM B313 (welded tube). Always confirm the exact specification and temper with our team for your order.

화학 성분

요소	백분율(%)
Si	최대 0.10
Fe	최대 0.15
Cu	2.0 - 2.6
Mn	최대 0.05
Mg	1.8 - 2.3
Cr	최대 0.04
Zn	7.6 - 8.4
Ti	최대 0.06
Zr	0.08 - 0.25
기타(각)	0.05
기타(합계)	0.15
Al	잔액

열처리 상태에 따른 기계적 특성

성질	인장 강도(MPa)	항복 강도(MPa)	연신율 (%)	전단 강도(MPa)
T7751	570 – 600	520 – 550	10 – 12	150 – 340
T6 / T651	570 – 600	520 – 550	10 – 12	150 – 340

Values are typical for the T7751 / T6 tempers. Composition was corrected to AA 7055 limits (see audit report) and must be confirmed with the mill certificate.

템퍼 선택 가이드

• T7751 — Peak overaged temper; primary aerospace choice with strength plus corrosion resistance.
• T6 / T651 — Peak-aged for maximum strength where corrosion is less critical.
• F / O — As-fabricated and annealed conditions for forming before heat treatment.

주요 특징

Highest strength among common 7xxx

Exceeds 7050 and 7075 in compression and fatigue.

Excellent fatigue performance

Holds up under cyclic load in thick sections.

Good stress-corrosion resistance (T7751)

Overaging balances strength and corrosion.

Poor weldability

Supplied as machined or formed parts.

애플리케이션

• Aerospace wing skins and spars
• Military airframe structures
• High-performance forgings
• Space structures
• Racing and performance components

가공 및 표면 마감 참고 사항

Linsy CNC-machines and laser-cuts 7055, then anodizes or paints for corrosion protection. Welding is not recommended.

품질 문서 및 검사

Linsy is a Shenzhen-based aluminum supplier with more than 20 years of experience. Our quality system is certified to ISO 9001, ISO 14001, and ISO 45001. Every order ships with a mill test certificate (MTC). SGS third-party test reports are available on request. Typical custom lead time is 10–60 days depending on temper, size, and quantity.

Why Choose Linsy for 7055 Aluminum

• Shenzhen factory with 20+ years serving aerospace, automotive, and general engineering buyers
• Wide form range: sheet, plate, coil, tube, bar, wire, profile, and forging stock
• CNC machining, laser cutting, TIG/MIG welding, and anodizing / polishing / powder coating under one roof
• Mill test certificate with every order; SGS reports on request
• ISO 9001 / ISO 14001 / ISO 45001 certified operations

관련 자료

For deeper reading on 7xxx selection and fabrication, see our guides on aluminum alloy selection, welding 7000-series alloys, and aircraft-grade tempers. (Internal links to be connected to published Linsy blog articles.)

7055 Aluminum FAQ

Is 7055 stronger than 7075?

Yes. 7055 is among the strongest commercial 7xxx alloys, with higher compression and fatigue strength, especially in thick sections.

Which temper is best for corrosion?

T7751 offers the best balance of strength and stress-corrosion resistance.

Is 7055 weldable?

No, it is not a welding grade; design as machined or formed parts.

What documents come with the order?

Every order ships with an MTC, and SGS third-party test reports are available on request.

주문 관련 일반적인 자주 묻는 질문

일반적인 리드 타임은 얼마인가요?

Custom aluminum orders typically ship in 10–60 days depending on alloy, temper, size, and quantity. Stock or standard sizes may be faster — ask our team.

Can I get a mill test certificate?

Yes. Every order includes an MTC. SGS third-party test reports are available on request.

Do you offer machining and finishing?

Yes. We provide CNC machining, laser cutting, welding, anodizing, polishing, and powder coating so parts can be delivered closer to finished form.

견적을 어떻게 요청합니까?

Send your alloy, temper, dimensions, quantity, and required standard. Our team will confirm availability, lead time, and pricing.