BOZE CNC Ti | Beta Titanium Alloy

Ti-5Al-5V-5Mo-3Cr High Strength Titanium Ti-5-5-5-3

Ti-5Al-5Mo-5V-3Cr (Ti-5-5-5-3) — a high-strength metastable beta titanium alloy offering superior hardenability, strength, and toughness compared to earlier beta alloys. Increasingly specified for large-section landing gear forgings and advanced aerospace structural components.

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Entity Definition

What is Ti-5Al-5V-5Mo-3Cr (Ti-5553)?

Ti-5Al-5V-5Mo-3Cr (commonly known as Ti-5553) is a metastable beta titanium alloy developed as a successor to Ti-10V-2Fe-3Al (Grade 19). It offers superior deep-section hardenability — enabling uniform mechanical properties in cross-sections up to 150 mm (6 inches) — combined with an excellent balance of high strength, fracture toughness, and fatigue resistance.

Classification

Metastable Beta Titanium Alloy (β)
UNS Number

UNS R58640

Common Names

Ti-5Al-5Mo-5V-3Cr Ti-5553 UNS R58640 High-Strength Beta Ti

Key Characteristics

  • Exceptional deep hardenability — uniform properties through thick sections (up to 150 mm)
  • Very high strength — up to 1,310 MPa (190 ksi) achievable
  • Excellent fracture toughness at high strength levels
  • Superior fatigue crack growth resistance compared to Ti-6Al-4V
  • Good forgeability with wide processing window
  • Reduced processing cost vs. Ti-10V-2Fe-3Al due to wider composition tolerance
  • Increasingly preferred for next-generation landing gear and airframe structures
Applicable Standards

Applicable Standards

Ti-5553 titanium conforms to the following material standards:

AMS 6940 — Forgings (Ti-5Al-5V-5Mo-3Cr)
AMS 6941 — Bars, Wire, and Rings
ASTM B348 — Bars and Billets
ASTM B381 — Forgings
Various OEM specifications (Boeing, Airbus, Lockheed Martin)
Material Properties

Mechanical & Physical Properties

Typical properties for Ti-5553 (solution treated and aged condition):

Tensile Strength (min, STA) 1,240–1,310 MPa (180–190 ksi)
Yield Strength 0.2% Offset (min, STA) 1,170–1,240 MPa (170–180 ksi)
Elongation (min) 6–10%
Reduction of Area 15–25%
Fracture Toughness KIC 35–55 MPa√m
Density 4.67 g/cm³ (0.169 lb/in³)
Elastic Modulus 115 GPa (16.7 × 10⁶ psi)
Beta Transus 845°C (1,553°F)
Hardness (aged) 40–45 HRC
Max Section Thickness (uniform properties) 150 mm (6 in)
Processing Methods

Available Processing Methods

Ti-5553 can be processed using the following manufacturing techniques:

Forging — Primary processing method; beta/sub-transus forging at 830–950°C
CNC machining — Fair to good in aged condition; machines better than equivalent-strength steels
Solution treatment — At 830–860°C (1,525–1,580°F) followed by water or oil quench
Aging — At 580–650°C (1,075–1,200°F) for 4–8 hours depending on strength-toughness balance
Hot isostatic pressing (HIP) — For cast or powder forms to eliminate porosity
TIG welding — Limited; requires post-weld heat treatment to restore mechanical properties
Electron beam welding — Applicable with proper process development
Chemical milling — Standard HF/HNO₃ with beta alloy etching parameters
Downstream Products

Typical Products & Components

Ti-5553 is commonly fabricated into the following downstream products:

Large-section landing gear components — main landing gear beams, truck beams, drag braces
Airframe structural forgings — wing box fittings, fuselage frames
Helicopter dynamic components — rotor hubs, swashplates
High-strength structural fasteners and tie rods
Missile airframe structures
Engine pylon and nacelle attachment structures
High-performance automotive suspension and chassis components
Motorsports uprights and suspension arms
Industries

Primary Industries

Ti-5553 serves as a material of choice across these industries:

Aerospace — Landing gear structures (increasingly preferred over Ti-10-2-3), airframe forgings
Defense — Military aircraft, missile structures, armored vehicle components
Automotive — High-performance suspension and chassis components
Motorsports — Formula 1 and endurance racing components
Oil & gas — Heavy-section high-strength downhole components
Alternative Materials

Alternative Materials

Depending on application requirements, Ti-5553 may be substituted by:

Grade 19 (Ti-10V-2Fe-3Al) — Earlier generation beta alloy with shallower hardenability
Grade 5 (Ti-6Al-4V) — Lower strength but more cost-effective for smaller sections
Ti-6Al-2Sn-4Zr-6Mo — Higher-temperature beta-rich alternative
300M Steel — Traditional landing gear material with higher modulus but heavier
INCONEL 718 — Higher temperature capability but significantly higher density
Why BOZE CNC Ti

Why Choose Us for This Grade

BOZE CNC Ti is a precision manufacturer of Ti-5Al-5V-5Mo-3Cr (Ti-5553) high-strength beta titanium components for aerospace landing gear and structural applications. Our AS9100D-certified facility offers precision forging, 5-axis CNC machining, and vacuum heat treatment with full material traceability and NADCAP NDT inspection.

Frequently Asked Questions

Common questions from engineers about this titanium grade and our precision machining capabilities.

What is Ti-5Al-5V-5Mo-3Cr (Ti-5553) high-strength titanium?

Ti-5Al-5V-5Mo-3Cr, commonly known as Ti-5553, is a metastable beta titanium alloy developed as a successor to Ti-10V-2Fe-3Al (Grade 19). It offers excellent through-hardenability in thick sections up to 150 mm, combined with strengths up to 1,310 MPa (190 ksi) and superior fracture toughness.

What aerospace applications use Ti-5553?

Ti-5553 is increasingly specified for large landing gear forgings, airframe structural components, helicopter rotor components, and high-strength fasteners in next-generation aircraft programs. Its deep hardenability makes it ideal for heavy-section structural forgings.

What processing capabilities do you have for Ti-5553?

We offer precision forging, 5-axis CNC machining, and vacuum heat treatment (solution treat and age) for Ti-5553 components. Our AS9100D-compliant facility provides full material traceability, CMM dimensional verification, and NADCAP NDT inspection.

Need Ti-5Al-5V-5Mo-3Cr High Strength Titanium Components?

Our engineering team delivers precision-machined components in Ti-5Al-5V-5Mo-3Cr High Strength Titanium. Submit your RFQ for a competitive quote within 24–48 hours.

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About Boze Titanium Manufacturing Center

One Metal. One Focus. Infinite Precision.

Founded in 2011 in Baoji's Titanium Valley, BOZE Metal is dedicated exclusively to titanium — from raw material to precision engineering. AS9100D, ISO 13485 & ISO 9001 certified with 500+ clients across Aerospace, Medical & Motorsport industries, we deliver end-to-end precision titanium CNC machining with full material traceability from source to component.

Boze CNC Ti is the dedicated titanium manufacturing center of Baoji Boze Metal Products Co., Ltd.

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