Titanium Grade 7 Round Bar
➡️ Ti Grade 7 | UNS R52400 | EN 3.7235 | ASTM B348
➡️ 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:
R52400
Wr. No.:
3.7235
MTC Available:
EN 10204 3.1
Product Description for Titanium Grade 7 Round Bar
Titanium Grade 7 Round Bar is commercially pure titanium with 0.12–0.25% palladium, designated UNS R52400 and 3.7235. It is supplied to ASTM B348, with ASME SB348 for pressure equipment.
The base metal is Grade 2, so strength, ductility and weldability are the same. What changes is corrosion behaviour. Plain titanium relies on its oxide film, which can break down in hot, reducing or oxygen-starved conditions. The palladium addition helps the film stay in place.
Bars are supplied annealed and can be descaled, turned or ground. The metal is non-magnetic and light. Grade 7 is the benchmark palladium titanium. The small palladium content shifts the corrosion potential of titanium into its passive range in acids where Grade 2 would corrode, such as dilute hydrochloric and sulfuric acid at moderate temperature. It also resists crevice corrosion in hot chloride brines at temperatures where Grade 2 is at risk. Because palladium is expensive, lower-palladium Grade 16 and ruthenium-bearing Grade 26 were developed as cheaper options, but Grade 7 remains the reference grade for the most demanding reducing conditions. Chlor-alkali plants, chlorate cells, brine heaters and organic acid units are common users. Bar is machined into pump shafts, agitator parts, valve stems, flanges and bolts, and is often ordered alongside Grade 7 tube and plate for the same unit. Because titanium is light, Grade 7 fasteners also reduce weight on large equipment covers. It is widely stocked in the diameters used for fasteners and pump shafts. Cut pieces can be supplied with full traceability.
Common Applications of Titanium Grade 7 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 Grade 7 Round Bar
Standard
Country / Region
Grade
UNS
USA
UNS R52400
ASTM / ASME
USA
ASTM B348 / ASME SB348
EN
Europe
EN 3.7235
GB/T
China
TA9
JIS
Japan
JIS TP340Pb / TAP5250
KS
South Korea
Grade 7 / Ti-Pd
Technical Specification for Titanium Grade 7 Round Bar
Specification
Value
Unit
Material
Titanium
-
Grade
Grade 7 / UNS R52400
-
Standard
ASTM B348 / ASME SB348
-
Product Form
Round bar
-
Diameter (supply range)
6–300
mm
Length (random)
1–6
m
Manufacturing Process
Hot rolled or forged, then annealed and finished
-
Production Route
VAR (vacuum arc remelting) or EB / plasma cold hearth melting
-
Surface Finish
Descaled, turned, ground or polished
-
Heat Treatment / Delivery Condition
Annealed
-
Tolerance Standard
Per ASTM B348 tolerance tables or as agreed
-
Density
4.51
g/cm³
Thermal Conductivity at 20°C
16.4
W/m·K
Coefficient of Thermal Expansion 20–100°C
8.6
µm/m·K
Modulus of Elasticity at 20°C
103
GPa
Magnetic Properties
Non-magnetic
-
Testing / Inspection
Chemical analysis incl. interstitials, tensile, dimensional, UT on request
-
Certification
EN 10204 3.1 mill test certificate
-
Technical Specifications
Get the key technical specifications for Titanium Grade 7 Round Bar
Titanium Grade 7 Round Bar is ordered as UNS R52400 to ASTM B348, which sets chemistry, tensile properties and tolerances for annealed bar.
Annealing is carried out at about 650–760°C. Test reports should cover chemistry including palladium and the interstitial elements, tensile tests and dimensions.
For pressure equipment, ASME SB348 and the matching ASME code allowable stresses apply, which are the same as for Grade 2 because the strength is the same. Bar is used mainly for flanges, fasteners, valve stems, pump shafts and fittings that match Grade 7 tube, plate and pipe in the same plant. Buyers should check that the certificate shows the palladium content, because a bar without palladium looks and machines exactly like Grade 2. Positive material identification by XRF can confirm palladium on received bar. If the design allows, Grade 16 or Grade 26 can be quoted as lower-cost options, but they must be approved by the end user.
Diameter and length tolerances follow ASTM B348 tables, or tighter limits can be agreed for ground bar. For large bars, ultrasonic testing can be added. When parts are welded to Grade 7 plate or tube, specify matching filler and weld procedure qualification on the same grade.
Chemical Composition for Titanium Grade 7 Round Bar
Element
Symbol
Min
Max
Unit
Nitrogen
N
-
0.03
%
Carbon
C
-
0.08
%
Hydrogen
H
-
0.015
%
Iron
Fe
-
0.30
%
Oxygen
O
-
0.25
%
Palladium
Pd
0.12
0.25
%
Residuals each
-
-
0.1
%
Residuals total
-
-
0.4
%
Titanium
Ti
Balance
-
%
Chemical Composition
View the chemical composition and applicable material limits for Ti Grade 7 Round Bar
The table shows the ASTM B348 limits for Grade 7. The interstitial limits match Grade 2: oxygen at 0.25% maximum and iron at 0.30% maximum, which set the strength level. Nitrogen at 0.03%, carbon at 0.08% and hydrogen at 0.015% are limited to protect ductility and prevent hydride embrittlement. Palladium at 0.12–0.25% does not change the strength. It works by speeding up the hydrogen reaction at the metal surface, which keeps the titanium in its protective passive state in acids that would otherwise attack it. Even small amounts are effective, which is why Grade 16 with about 0.05% palladium also gives useful protection, though with a narrower safety margin than Grade 7.
Residual elements are capped at 0.1% each and 0.4% in total, and titanium makes up about 99% of the metal. The certificate value for palladium should sit inside 0.12–0.25%, because a heat below the range may not give full protection in reducing acids. Iron smeared onto the surface during machining can also reduce corrosion resistance locally, so tools used on steel should be cleaned first. The palladium level is checked on every heat.
Mechanical Properties for Titanium Grade 7 Round Bar
Mechanical Property
Value
Unit
Tensile Strength (ASTM B348)
≥ 345
MPa
Yield Strength 0.2% (ASTM B348)
275–450
MPa
Elongation (ASTM B348)
≥ 20
%
Reduction of Area (ASTM B348)
≥ 30
%
Mechanical Properties
Check the key mechanical properties and performance requirements of Ti Grade 7 Round Bar
The table gives the ASTM B348 tensile, yield range, elongation and reduction of area requirements for annealed Grade 7. ASTM B348 requires Grade 7 bar to reach tensile strength of at least 345 MPa, yield strength of 275–450 MPa, elongation of at least 20% and reduction of area of at least 30%. These are the same as for Grade 2, so design stresses for Grade 2 can be used. The yield range has both a minimum and a maximum, which keeps the metal ductile enough for forming and welding. Grade 7 keeps good toughness at low temperature. Its strength falls as temperature rises, and the ASME code gives allowable stresses up to about 315°C. For higher strength with palladium, Grade 24 (Ti-6Al-4V-Pd) can be used.
Because Grade 7 cannot be hardened, its strength is set by oxygen and iron alone, and any strength gained by cold work is lost if the part is annealed after forming. For stronger palladium or ruthenium grades, Grade 24 (Ti-6Al-4V-Pd) or Grade 29 (Ti-6Al-4V ELI-Ru) are options, though they cost more and are harder to form.
Fatigue strength in seawater and brines stays close to that in air, which suits pump shafts and agitators. Hardness is not an ASTM B348 acceptance value, but a quick hardness check can help spot mixed stock.
Dimension / Sizes for Titanium Grade 7 Round Bar
Dimension / Size
Value
Unit
Available Diameter Range (supply capability)
6–300
mm
Standard Length (random)
1–6
m
Custom / Cut-to-Length
Available on request
-
Diameter Tolerance
Per ASTM B348 tolerance tables or as agreed
-
Length Tolerance
Per ordered standard or as agreed (commonly +50 / -0 mm for cut lengths)
-
Straightness Tolerance
Per ASTM B348 or as agreed
-
End Condition
Saw cut square, chamfered or as ordered
-
Surface Finish
Descaled, sandblasted, pickled, rough turned, turned, centreless ground or polished
-
Dimensions & Sizes
Explore available diameters, lengths, and dimensional requirements for Ti Grade 7 Round Bar
Pricing for Titanium Grade 7 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 7 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
Should I choose Titanium Grade 7 or Grade 2?
Why does Titanium Grade 7 contain palladium?
What are cheaper alternatives to Titanium Grade 7?
How can I confirm that bar is really Grade 7 and not Grade 2?
How is Titanium Grade 7 welded and machined?
What are the limits of Titanium Grade 7?
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