Titanium Grade 3 Round Bar
➡️ Ti Grade 3 | UNS R50550 | W.Nr. 3.7055
➡️ ASTM, EN, JIS & International Standards
➡️ Supply Conditions
➡️ Multiple Diameters & Supply Lengths
➡️ Global Export & International Delivery
Country of Origin:
Europe, Japan, USA
Material Type:
Titanium
UNS Number:
R50550
Wr. No.:
3.7055
MTC Available:
EN 10204 3.1
Product Description for Titanium Grade 3 Round Bar
Titanium Grade 3 Round Bar is a solid cylindrical bar produced from commercially pure titanium UNS R50550. Bar and billet are supplied to ASTM B348 / B348M, with forgings covered by ASTM B381 and the ASME designation SB348 applying to pressure service. The material number is 3.7055.
Grade 3 is the medium-strength member of the commercially pure family, permitting up to 0.35% oxygen and 0.30% iron. These higher interstitial limits give a minimum tensile strength of 450 MPa, a minimum 0.2% yield strength of 380 MPa and a minimum elongation of 18%. It is chosen where the strength of Grade 2 is insufficient but the cost, weldability and formability advantages of unalloyed titanium over Ti-6Al-4V are still wanted.
Corrosion resistance is essentially identical to Grades 1 and 2, deriving from the same stable and self-healing titanium dioxide film. The alloy resists seawater, chlorides, wet chlorine, hypochlorite, nitric acid and a wide range of oxidising media, and is immune to chloride stress-corrosion cracking. The higher strength permits thinner sections in pressure applications, which partially offsets the material cost.
Bar is supplied annealed in diameters from about 6 mm to 200 mm and lengths of 3 to 6 m. As with the other commercially pure grades, the alpha structure cannot be strengthened by heat treatment.
Typical applications include pressure vessel and cryogenic components, aircraft and airframe fittings, chemical process hardware, heat exchanger and condenser parts, marine and offshore fittings, and surgical implant components. Industries served include chemical processing, aerospace, marine, power generation, desalination and medical device manufacture.
Common Applications of Titanium Grade 3 Round Bar
➡️ Machined shafts, spindles, valve stems, pump sleeves and pins for food, beverage, dairy and pharmaceutical equipment, where the passive chromium oxide film resists both product acids and caustic clean-in-place chemicals.
➡️ Fasteners, studs, bolts, threaded rod and anchor components produced from bar stock, chosen for corrosion resistance combined with the ductility needed for cold heading and thread rolling.
➡️ Chemical, water treatment and general process plant parts such as agitator shafts, flange blanks, nozzles and support components handling water, steam and mildly corrosive media free of significant chlorides.
➡️ Architectural and structural hardware including handrail stanchions, balustrade fittings, tension rods and bollards, where a bright ground or polished bar finish provides both appearance and low maintenance.
International Equivalent Grade for Ti Gr 3 Round Bar
Standard
Country / Region
Grade
ASTM B348 / B348M
USA
Grade 3 (UNS R50550) - bars and billets
ASME SB348
USA
SB348 Grade 3
ASTM B381
USA
Grade F-3 - forgings
DIN 17860 / DIN 17862
Europe / EU
Ti3 (3.7055)
JIS H4650
Japan
Class 3
GB/T 2965
China
TA3
ISO 5832-2
International
Commercially pure titanium, unalloyed grade 3 - surgical implant applications
Technical Specification for Titanium Grade 3 Round Bar
Specification
Value
Unit
Material
Commercially pure titanium
-
Grade
Titanium Grade 3 / UNS R50550 / 3.7055
-
Product Form
Round bar / rod / billet
-
Standard
ASTM B348 / B348M and ASME SB348
-
Diameter
6 - 200 (available range)
mm
Length
3 - 6 (standard random or fixed)
m
Manufacturing Process
Hot rolled, forged, or hot rolled and cold drawn
-
Production Route
Vacuum arc remelting of titanium sponge, hot working, annealing, pickling
-
Surface Finish
Hot-finished and pickled, peeled, rough turned, cold-drawn, ground, polished
-
Heat Treatment / Delivery Condition
Annealed
-
Annealing Temperature
650 - 760 then air cool (typical)
deg C
Stress Relief Temperature
480 - 595 (typical)
deg C
Maximum Continuous Service Temperature
300 (typical, oxidising conditions)
deg C
Tolerance Standard
ASTM B348 / B348M
-
Density
4.51 (typical)
g/cm3
Melting Point
1668 (approximate)
deg C
Thermal Conductivity
15.6 at 20 deg C (typical)
W/m.K
Coefficient of Thermal Expansion
8.6 at 20 - 100 deg C (typical)
micro-m/m.K
Specific Heat
523 at 20 deg C (typical)
J/kg.K
Electrical Resistivity
0.56 (typical)
micro-ohm.m
Modulus of Elasticity
105 (typical)
GPa
Magnetic Properties
Non-magnetic
-
Applicable Testing Standard
ASTM E8 / E8M, ASTM E120, ASTM E1409, ASTM E1447, ASTM E2371
-
Certification / Inspection Documents
EN 10204 Type 3.1 or 3.2 mill test certificate
-
Technical Specifications
Get the key technical specifications for Titanium Grade 3 Round Bar
Titanium Grade 3 Round Bar is supplied to ASTM B348 / B348M for titanium and titanium alloy bars and billets, adopted by ASME as SB348 for pressure applications. Forgings are covered by ASTM B381 as Grade F-3, and surgical implant material follows ISO 5832-2 or ASTM F67 with additional cleanliness and microstructure requirements.
Bar is supplied annealed, typically at 650-760 deg C followed by air cooling. Grade 3 is a single-phase alpha titanium and is not hardenable by heat treatment, so annealing serves only to recrystallise the structure and restore ductility. Stress relief at 480-595 deg C is used after machining or forming to remove residual stress without significant loss of strength.
The higher oxygen content that gives Grade 3 its strength also reduces formability relative to Grade 2, so bend radii must be more generous and cold forming operations are more limited. Machinability is broadly similar, requiring sharp tooling, low speeds, heavy positive feeds, rigid setups and flood coolant.
Welding by GTAW, GMAW, plasma or electron beam is straightforward provided the weld pool, root and cooling metal are fully shielded with inert gas, since titanium absorbs oxygen, nitrogen and hydrogen rapidly above about 500 deg C and becomes embrittled.
Testing includes tensile testing to ASTM E8 / E8M and interstitial gas analysis for oxygen, nitrogen and hydrogen. Ultrasonic examination and additional non-destructive testing may be specified for pressure and aerospace applications.
Chemical Composition for Titanium Grade 3 Round Bar
Element
Symbol
Min
Max
Unit
Nitrogen
N
-
0.05
%
Carbon
C
-
0.08
%
Hydrogen
H
-
0.015
%
Iron
Fe
-
0.30
%
Oxygen
O
-
0.35
%
Residual elements, each
-
-
0.10
%
Residual elements, total
-
-
0.40
%
Titanium
Ti
Balance
Balance
%
Chemical Composition
View the chemical composition and applicable material limits for Ti Gr 3 Round Bar
Titanium Grade 3 is unalloyed, so its properties are set entirely by the permitted levels of interstitial and residual elements rather than by deliberate alloying additions.
Oxygen at 0.35% maximum defines the grade. It dissolves interstitially in the hexagonal alpha lattice and distorts it, which is a very effective way of strengthening the metal. Raising the ceiling from 0.25% in Grade 2 to 0.35% lifts the minimum tensile strength from 345 MPa to 450 MPa, an increase of nearly a third, at the cost of reduced ductility and formability. This is the mechanism by which all four commercially pure grades are differentiated.
Nitrogen at 0.05% maximum is higher than the 0.03% permitted in Grades 1 and 2. Nitrogen strengthens even harder than oxygen but embrittles faster, so the limit only moves up a little.
Iron at 0.30% maximum is a substitutional beta stabiliser that contributes to strength. The limit exists primarily to protect corrosion performance, since iron-rich intermetallic particles can act as local cathodic sites.
Hydrogen at 0.015% maximum is restricted because it precipitates as brittle titanium hydride platelets, causing delayed failure under sustained load.
Carbon at 0.08% maximum is a processing residual. Other residuals are limited to 0.10% each and 0.40% in total, with titanium as the balance. Corrosion resistance is unchanged from Grades 1 and 2.
Mechanical Properties for Titanium Grade 3 Round Bar
Mechanical Property
Value
Unit
Tensile Strength
450 (minimum, annealed)
MPa
Yield Strength 0.2% Offset
380 (minimum, annealed)
MPa
Elongation in 4D or 50 mm
18 (minimum, annealed)
%
Reduction of Area
30 (minimum, annealed)
%
Hardness
Not specified by ASTM B348
HBW
Impact / Charpy V-Notch
Not required by ASTM B348 unless specified
J
Modulus of Elasticity
105 (typical)
GPa
Mechanical Properties
Check the key mechanical properties and performance requirements of Ti Gr 3 Round Bar
The values listed are the requirements of ASTM B348 / B348M for Titanium Grade 3 bar in the annealed condition. Minimum tensile strength is 450 MPa, minimum 0.2% offset yield strength is 380 MPa, and minimum elongation in 50 mm is 18%. Testing follows ASTM E8 / E8M.
All four values are minima under B348 Table 2, reduction of area included. B348 sets no maximum on yield strength and no hardness requirement for bar.
Grade 3 is single-phase alpha titanium and cannot be strengthened by heat treatment. Annealing recrystallises the structure and restores ductility, and stress relief at 480-595 deg C removes residual stress without significant strength change. Any strength above the annealed condition comes from cold work and is lost on subsequent annealing.
In selection terms, Grade 3 occupies a useful position. It offers roughly 30% more strength than Grade 2 with identical corrosion resistance and only modestly reduced formability, allowing thinner sections in pressure applications. It remains far more weldable and formable than Ti-6Al-4V, and considerably less expensive.
The modulus of elasticity of about 105 GPa is roughly half that of steel, so stiffness-critical designs must account for approximately twice the deflection.
Dimension / Sizes for Titanium Grade 3 Round Bar
Dimension / Size
Value
Unit
Diameter (available range)
6 - 200
mm
Standard Length
3 - 6
m
Custom Length
Cut to length on request
-
Diameter Tolerance
Per ASTM B348 / B348M
-
Length Tolerance
Per ASTM B348 / B348M or as agreed
-
Straightness Tolerance
Per ASTM B348 / B348M or as agreed
-
End Condition
Square cut, saw cut, chamfered or as ordered
-
Surface Finish
Hot-finished and pickled, peeled, rough turned, cold-drawn, ground, polished
-
Cut-to-Length Availability
Available
-
Dimensional Standard
ASTM B348 / B348M
-
Dimensions & Sizes
Explore available diameters, lengths, and dimensional requirements for Ti Gr 3 Round Bar
Pricing for Titanium Grade 3 Round Bar
Round Bar Prices are generally quoted per kilograms or meters tonnes and can fluctuate with the global raw material and market prices. The final price will depend on a variety of factors, including the grade size, diameter, length, surface finish, the quantity and whether the bars are cut to length or in standard lengths.
For smaller quantities, we can also quote per metre or per piece basis once the required dimensions have been confirmed. Container-loads or orders that are larger in size are typically priced per tonne, based upon the specifications required and the supply conditions.
Please provide your desired dimensions, grades, length number, and end for a current quote including the lead time applicable and details for certification.
Pricing
Get current Titanium Grade 3 Round Bar pricing based on size, quantity, grade, finish, and delivery requirements.
Why Choose Us
Euro Steel Bars is an international distributor, stockist and exporter of stainless round steel bars that cover carbon, stainless alloy, special grades. We stock a variety of sizes and grades. We guarantee every order with mill test certificates as well as full quality-assurance documentation. Our name speaks to our roots: European-sourced materials that is backed by the certificates and rigor that buyers from Asia as well as the Gulf and Africa are looking for.
Each bar we deliver is accompanied by EN 10204 3.1 mill test certificates as well as complete documentation of quality, so what you receive corresponds to what’s written in the documents. We carry a selection of sizes and grades ready for transport, and cut length upon the request of customers, which results in quicker lead times, whether you’re ordering just a one-off spec or a complete project tonnage.
We operate an actual wholesale business that is that is supported with an internationally-operated supply chain therefore we are able to serve fabricators sourcing one grade the same way in the same way as an EPC contractor who is placing a large order. Our clients include manufacturers, fabricators EPC construction companies, engineers oil and gas projects as well as construction companies. we design our inventory as well as documentation to show what buyers need to bring projects forward.
Our customers trust us across Qatar, Oman, Bahrain, Kuwait, Jordan, Malaysia, Singapore, Thailand, Taiwan, Turkey, Italy and South Africa. If you’re looking to source an Gulf energy project, or a construction project within Southeast Asia, you get the same quality of certified material, the exact documentation, and the exact delivery procedure.
Frequently Asked Questions
What is Titanium Grade 3 Round Bar?
What standard does Titanium Grade 3 Round Bar comply with?
What is the difference between Titanium Grade 2 and Grade 3?
Can Titanium Grade 3 be hardened by heat treatment?
What are the key mechanical properties of Titanium Grade 3?
When should Grade 3 be chosen over Ti-6Al-4V?
Can Titanium Grade 3 be welded?
What sizes and finishes are available?
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