ASTM B265 Titanium Sheet

ASTM B265  is a technical specification for titanium and titanium alloy strips, sheets, and plates published by the American Society for Testing and Materials (ASTM). This standard specifies the core requirements for the chemical composition, mechanical properties, dimensional tolerances, and inspection methods of materials, and is applicable to the production and acceptance of titanium materials in aerospace, chemical, medical, and other fields.

 

 

1: GB 228 Metallic Tensile Test Method
2: GB/T 3620.1 Titanium and Titanium Alloy Number and Chemical Composition
3: GB/T3620.2 Chemical Composition and Allowable Deviation of Titanium and Titanium Alloy Processing Products
4: GB 4698 Chemical analysis methods for sponge titanium, titanium and ferroalloys

 

Item	N	C	H	Fe	O	Al	V	Pa	Mo	Ni	Ti
GR1	0.03	0.08	0.015	0.2	0.18	/	/	/	/	/	Bal.
GR2	0.03	0.08	0.015	0.3	0.25	/	/	/	/	/	Bal.
GR3	0.05	0.08	0.015	0.3	0.35	/	/	/	/	/	Bal.
GR4	0.05	0.08	0.015	0.5	0.4	/	/	/	/	/	Bal.
GR5	0.05	0.08	0.015	0.4	0.2	5.5-6.75	3.5-4.5	/	/	/	Bal.
GR7	0.03	0.08	0.015	0.3	0.25	/	/	0.12-0.25	/	/	Bal.
GR9	0.03	0.08	0.015	0.25	0.15	2.5-3.5	2.0-3.0	/	/	/	Bal.
GR12	0.03	0.08	0.015	0.3	0.25	/	/	/	0.2-0.4	0.6-0.9	Bal.

 

 

Grade	Tensile Strength min		Yield Strength min		Elongation
	MPa	kis	Mpa	ksi	%
Gr 1	240	35	138	20	24
Gr 2	345	50	275	40	20
Gr 3	450	65	380	55	18
Gr4	550	80	483	70	24
Gr5	895	130	828	120	20
Gr 7	345	50	275	40	20
Gr 9	620	90	483	70	15
Gr12	483	70	50	50	18

 

 

Material Form: The standard specifically covers products supplied in the annealed condition, including strip, sheet, and plate.

In this standard, the definition of "Sheet" and "Plate" is based on thickness :

Sheet: Material under 0.187 inches (4.75 mm) in thickness.

Plate: Material 0.187 inches (4.75 mm) and over in thickness.

• T 0.5-5.0mm x W1000-1500mm x L 2000-3500mm
• T 6.0- 30mm x W1000-2500mm x L 3000-6000mm
• T 30- 80mm x W1000mm x L 2000mm

• Hot forging is a forging process carried out above the recrystallization temperature of metal.
• Hot rolling is a rolling process carried out at temperatures higher than the recrystallization temperature.
• The rolling process in which the plastic deformation temperature of cold rolling is lower than the recovery temperature.
• Annealing: A metal heat treatment process in which a metal is slowly heated to a certain temperature, held for a sufficient period of time, and then cooled at an appropriate rate (usually slow cooling, sometimes controlled cooling).
• Acid washing: Immerse the workpiece in an aqueous solution such as sulfuric acid to remove thin films of oxides and other substances on the metal surface. It is a pre-treatment or intermediate treatment for electroplating, enamel, rolling and other processes

 

According to ASTM B265 and related application practices, the common supply states of titanium plates are:

• Annealed state: After annealing treatment, the crystal particles of titanium plate become finer, stress is eliminated, ductility and plasticity are improved, and hardness is reduced. titanium plates in annealed state usually has good processing performance and is suitable for various processing techniques.
• Cold Worked: After cold working (such as cold rolling, cold drawing, etc.), titanium plates can achieve higher hardness and strength, but may reduce ductility. TA10 in cold working state is commonly used in applications that require high strength and hardness.
• Post Weld Annealed Heat Treatment Status: After welding, titanium plates may experience stress concentration and grain coarsening issues, requiring post weld heat treatment to eliminate residual stresses and restore material properties.
• Solution Annealed state: After solution treatment, titanium plates can produce uniform grain structure and high strength, suitable for applications in high temperature and corrosive environments.
• Aging Treatment: After aging treatment, titanium plates can improve their hardness and strength while maintaining a certain degree of plasticity, making them suitable for high-strength applications under specific requirements.

For example, TA18 (Ti-3Al-2.5V) material is usually used in the annealed state and can also be used after cold working and stress relief annealing

 

• Multi stage deformation control: combining hot rolling and cold rolling, balancing formability and mechanical properties.
• Strict heat treatment requirements: The annealing process has a significant impact on the final structure and properties, and precise control of temperature and time is required.
• High surface quality requirements: Especially when used in corrosive environments or precision components, mirror or polishing treatment is often required.
• Suitable for multiple grades: including pure titanium (such as GR1/TA1, GR2/TA2) and near alpha/alpha+beta alloys (such as GR5/TC4, GR12/TA18), with different grades corresponding to different process windows.

 

 

The surface treatment process of ASTM B265 commonly includes surface cleaning, polishing, anodizing, sandblasting, electrochemical polishing, etc. These processes can improve the appearance, corrosion resistance, and functionality.

• Surface cleaning: Use appropriate cleaning agents and methods to clean the surface of the titanium plate, remove dirt and impurities, and ensure that the surface is clean.
• Polishing: By using mechanical polishing or chemical polishing methods, the surface of the titanium plate is made smooth and mirror like, improving its appearance quality.
• Anodizing: By anodizing in an appropriate electrolyte, an oxide film is formed to improve the corrosion resistance and decorative properties of titanium plates.
• Sandblasting: Using high-speed sandblasting equipment to spray abrasive particles onto the surface of titanium plates, producing a frosted effect and increasing surface roughness.
• Electrochemical polishing: The electrolytic polishing method is used to improve the smoothness and flatness of the titanium plate surface using electrochemical principles.
• Coating: Spraying, spray painting, electrophoretic coating and other processes are carried out on the surface of titanium plates to improve their anti-corrosion and decorative properties.

 

 

 

 

• Medical devices: Due to its biocompatibility and non toxicity, ASTM B265 titanium plates are commonly used in the manufacture of medical devices such as artificial joints, dental implants, surgical instruments, etc., which can avoid adverse reactions to the human body.
• Aerospace: ASTM B265 titanium plate is widely used in the aerospace industry due to its excellent corrosion resistance and high strength to weight ratio, including aviation engine components, spacecraft components, etc.
• Chemical industry: Due to its excellent corrosion resistance, ASTM B265 titanium plate can be used to manufacture chemical equipment, storage tanks, pipelines, etc., resist acid and alkali corrosion, and ensure the safety of chemical production.
• Marine Engineering: ASTM B265 titanium plate has good resistance to corrosion from seawater and salt spray, and is commonly used in the field of marine engineering, such as offshore platforms, ship components, etc.
• Automobiles and transportation vehicles: Due to the lightweight and high-strength characteristics of ASTM B265 titanium plates, they can be used to manufacture automotive components such as exhaust pipes and lightweight body structures, which can help reduce vehicle weight and improve fuel efficiency.

 

 

 

When sourcing material to ASTM B265, for full compliance and product confidence, you should check:

• Mill Test Reports (MTRs): These must certify that the material meets the specific requirements (chemical, tensile, hardness, etc.) of the ASTM B265 grade you are purchasing .
• Condition: Ensure the material is certified as annealed .
• Complete Specification: A purchase order should include the full standard and grade, for example: "ASTM B265, Grade 5 Titanium Sheet"

 

 

Q1: What is the difference between "Sheet" and "Plate" under ASTM B265?
A: The distinction is based solely on thickness and width.

 

Q2: What is the difference between ASTM B265 and ASTM F67?
A: This is a critical distinction for medical applications :

ASTM F67: Specifically for unalloyed titanium for surgical implant applications. It includes additional biocompatibility requirements and more stringent testing for medical use.

ASTM B265: Covers both unalloyed and alloyed titanium for general industrial applications (aerospace, chemical, marine).

 

Q3: What do the "H" suffix and "ELI" mean?
A:

• H (e.g., Grade 2H, 7H): Pressure vessel-specific version with a higher minimum tensile strength (≥58 ksi) than the standard grade (e.g., Grade 2 is ≥50 ksi). Over 99% of commercial Grade 2 already meets this, so the "H" grade exists for code compliance .
• ELI (Extra Low Interstitials): Purer composition with lower oxygen and iron content, resulting in improved fracture toughness and biocompatibility.  Used for medical implants and cryogenic applications .

 

Q4: Can I get tighter tolerances?
A: Yes. Precision thickness tolerances are available by agreement with the supplier (e.g., ±0.003" for 0.125" sheet). These typically involve additional cost and minimum order quantities

 

Q5: Can ASTM B265 titanium sheet be welded?
A: Yes, most grades weld readily.

 

Q6: Can it be cold formed or bent?
A: Yes, but titanium has lower room-temperature ductility than stainless steel (about half the modulus of elasticity)

 

Q7: What documentation should I request when buying ASTM B265 titanium sheet?
A: Always request Mill Test Reports (MTRs)

 

 

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