Gr4 Titanium Rod Description
Gr4 Titanium Rod Introduction
Gr4 titanium rods are high-purity, α-type single-phase titanium rods without alloying elements. They are the strongest grade of industrial pure titanium, specifically designed for structural components and corrosion-resistant parts in industrial settings, and are distinct from medical-grade titanium, which features ultra-low clearance control.
Grade: Gr4, UNS R50700, DIN3.7065
Rod form: Round rods, square rods, hexagonal rods, and other shapes produced through processes such as hot rolling, forging, and cold drawing are the most basic forms of titanium materials.
Produce process & equipment: The commercially pure titanium rods are made of high-purity titanium sponge, ingots produced by vacuum arc remelting two or more times, manufactured by forging billets, hot rolling, or forging into rods; and stress-relief annealing, followed by acid pickling, turning or grinding, straightening, precision cutting, and non-destructive testing before shipment. It features a uniform micro structure, good ductility, excellent corrosion resistance, and high dimensional accuracy.
Technical Specifications
Regular Specification
| Items | Specifications/range | Notes |
| Diameter range(φ，mm) | Regular market stock | φ8-φ200 mm |
| Small size cold drawing/polishing | φ4-φ30 mm(suitable for precision machining) | |
| Large-size forged rods | φ100-φ300 mm(customized) | |
| Cross sectional shape | Round rod | Regular sizes |
| Square/hexagonal rod | 6×6-80×80 mm(customized available), S6-S80 | |
| Common imperial sizes |
1/4″(6.35 mm) 1/2″(12.7 mm) 1″(25.4 mm) 2″(50.8 mm) 3″(76.2 mm) |
|
| Length(mm) | Annealed state(M) | 300-3000 mm(mainly irregular lengths) |
| Hot working/cold working state(R/Y) | 300-4000 mm | |
| Fixed length/multiple lengths | Tolerance allowed | Within the above range, a tolerance of +15 mm is allowed, with an additional +5 mm per cut. |
Supply Specification
| Code | Name | Common name | Features and performance |
| M | Annealed state | Annealed state, soft state | Good ductility, high toughness, stress-relieved, uniform microstructure. |
| R | Hot working state | Hot-rolled, forged, black-rod state | High strength, moderate ductility, non-uniform microstructure. |
| Y | Cold working state | Cold-drawn, hard state |
Cold-worked and strengthened Highest strength Low ductility High hardness |
Surface Specification
| Finished | Common name | Process description |
| Black-rod, forged, hot-rolled | Black-rod, rough rod | No treatment is performed after forging/hot rolling, leaving oxide scale and machining marks. |
| Turned surface | Turned surface | Rough turning on a lathe removes the black scale, revealing the raw metal color. |
| Polished surface | Polished rod bright rod | Rough turning on a lathe removes the black scale, revealing the raw metal color. |
| Mirror-polished surface | Mirror-polished surface | Centerless or external cylindrical grinding produces a bright silver-white surface with high dimensional accuracy. |
Chemical Specification
| Elements | Ti(balance) | O | Fe | C | N | H | Other impurities |
| Max. content(%) | ≥99 | ≤0.40 | ≤0.50 | ≤0.08 | ≤0.05 | ≤0.015 | ≤0.40 |
Physical Specification
| Basic properties | Standard | Physical specification | Value | Characters | Performance features |
| Tensile strength | ≥550 MPa | Density | 4.51 g/cm³ | Weldability | Excellent |
| Yield strength | ≥485 MPa | Melt point | ~1668 ℃ | Machinability | Excellent |
| Elongation | ≥15% | – | – | Corrosion resistance | Good |
| – | – | – | – | Low-temperature performance | Good |
International Standard
| Countries | Grade | Standard |
| China(GB) | TA4 | GB/T 2965 |
| USA(ASTM) | Grade 4(Gr.4) | ASTM B348 |
| Russia(GOST) | BT1-1 | GOST 19807 |
| Japan(JIS) | Class 4 | JIS H4650 |
| Europe(EN) | Ti4 | EN 3.7065 |
| Germany(DIN) | 3.7065 | DIN 17861 |
Commercially pure titanium grades comparison: Gr1 vs Gr2 vs Gr4
| Items | Gr.1 | Gr.2 | Gr.4 |
| ASTM | Grade 1 | Grade 2 | Grade 4 |
| Material positioning | Low-strength, high-ductility | General-purpose pure titanium | Highest-strength industrial pure titanium |
| Purity(Ti) | ≥99.5% | ≥99.2% | ≥99% |
| O | ≤0.18% | ≤0.25% | ≤0.40% |
| Fe | ≤0.20% | ≤0.30% | ≤0.50% |
| Tensile strength | ≥240 MPa | ≥340 MPa | ≥550 MPa |
| Yield strength | ≥138 MPa | ≥220 MPa | ≥485 MPa |
| Elongation | ≥20% | ≥18% | ≥15% |
|
Ductility toughness |
Best | Good | General |
| Punching/bending | Excellent | Good | Bad |
| Weldability | Best | Good | Good |
| Corrosion resistance | Best | Good | Good |
| Applications |
Stamping parts Titanium plate Titanium mesh Bellows/corrugated tube Anode Corrosion-resistant small components |
Chemical equipment Pipelines/piping Flanges Valves General structural components (largest consumption) |
High-strength bolts Shafts Tie rods/tension rods Fasteners Load-bearing structural components |
Features & Advantages
- High strength, with a tensile strength reaching ≥550 MPa.
- Good corrosion resistance, suitable for long time use in chemical and seawater situation.
- Low density of approximately 4.51 g/cm³, providing lightweight.
- Non-magnetic, will not affect precision instruments or medical equipment.
- Good biocompatibility, suitable for medical application.
- Strong thermal stability, reliable performance in high-temperature environments.
- Good machinability, supporting welding and cold working or hot working Long service life, low maintenance cost, suitable for high-load environments.
Performance Solution
Problem: Carbon steel is getting to rusting and corrosion under prolonged use in seawater, salt spray, or humid environments, will be in high maintenance costs.
Solution: Gr4 titanium rods are really good at resisting corrosion from seawater. This means they can be used in ships and other things that are in the water like seawater pumps and marine equipment without needing any treatment to stop them from rusting.
Problem: Stainless steel is getting corroded really easily when it is in strong acid or alkali. This means that pipes and containers made of steel do not last very long.
Solution: Gr4 titanium rods are different. They can resist acid and alkali corrosion well. This makes them perfect for storing chemicals and for use in pipelines and reactors because they can help equipment longer.
Problem: Carbon steel or iron equipment is really heavy. This makes it hard to install and transport. It costs a lot to build things with it.
Solution: Gr4 titanium rods are much lighter,they are about 57% as heavy as steel. This makes them much easier to transport and install which saves a lot of time and money.
Problem: Stainless steel can interfere with fields. This is a problem for equipment and MRI machines because it can affect how accurately they work.
Solution: Gr4 titanium is different because it is not magnetic. This means it is perfect for use in devices and precision instruments because it will not interfere with the magnetic fields.
Problem: Carbon steel or low-grade steel can be break easily when it is under a lot of stress. This makes it dangerous to use in equipment.
Solution: Gr4 titanium rods are really strong. Can resist fatigue, this means that they are perfect for use in parts that have to withstand a lot of stress and for equipment that has to run for a long time.
Problem: The carbon steel is hard to work with. It can be difficult to weld when it is being made into complex shapes. This can affect the quality of the product.
Solution: Gr4 titanium rods are easier to work with. They can be hot or cold worked and can be welded easily. They can be made into complex shapes without deforming. This makes them really versatile and useful for a lot of applications.
Problem: Carbon steel experiences a significant decrease in strength at high temperatures, resulting in insufficient load-bearing capacity of equipment.
Solution: Gr4 titanium rods exhibit stable high-temperature performance and can be used in high-temperature chemical equipment or aerospace components.
Problem: Food-grade or medical-grade steel may release metal ions, posing a safety risk.
Solution: Grade 4 titanium is safe to use in the body. Does not leak metal ions easily. This makes it perfect for implants and equipment that handles food meeting cleanliness standards.
Problem: Stainless steel can crack easily in condition with chlorine, like seawater, swimming pools and water treatment plants.
Solution: Gr4 titanium rods do not crack under chlorine stress. Can be used in seawater pumps, pipes and marine gear. This ensures they work well for a time.
Problem: Regular steel or low-quality steel rusts easily needs to be fixed and costs a lot to replace.
Solution: Gr4 titanium rods last a time do not corrode easily and save a lot on maintenance and replacement costs. This makes them suitable for uses that last a long time with Grade 4 titanium rods being very reliable.
Application
- The chemical industry uses this material in reaction vessels, storage tanks, pipelines and valves. It is very good at resisting corrosion, which means it will last a time even in acidic and alkaline conditions.
- The marine engineering field also uses this material. It is used in seawater pumps, ship parts and marine pipelines. This material is very resistant to corrosion from seawater and chloride stress corrosion. This means that it will not need to be maintained often which reduces the cost.
- This material is also used in devices, such as orthopedic screws, implants and surgical instruments. It is very safe to use in the body because it is biocompatible, non-toxic and non-magnetic.
- The aerospace industry uses this material too. It is used to make components, brackets and high-temperature parts. This material is very strong, lightweight. Can resist high temperatures. This makes it very good for use, in aerospace because it helps reduce the weight.
- Food and beverage industry: Used in fermentation equipment, food piping and agitators; non-toxic, does not release metal ions, and meets hygiene standards.
- Precision instruments and electronics: Suitable for laboratory equipment and semiconductor device supports; non-magnetic, high-precision, stable, corrosion-resistant, and suitable for sensitive environments.
Custom Processing Capabilities
1) Production Line Strength
Baoji Titanium Valley Ti-Ni-Zr Material Processing Co., Ltd. has invested a total of $36.2 million in high-end strip and foil production, establishing an advanced production line for titanium, nickel, zirconium and their alloy strips and foils in the world.
The production line specializes in the stable rolling of ultra-thin, wide-width strips, overcoming critical industry challenges such as springback, difficult shape control and inconsistent material properties. We achieved stable mass production of high-end titanium foil.
With an annual capacity of 3,000 tons, the production line is expected to realize an annual output value of $116 million, supporting large-volume supply demands from high-end customers in aerospace, electronics, new energy, chemical engineering and other industries..
2) The production line is equipped with advanced equipment in the world which can ensure high precision and stability for every coil of strip and foil:
A.750mm 20-high precision rolling mill: enable precision rolling of ultra-thin, wide-width strips
B.Continuous cleaning and annealing line: ensure surface cleanliness and uniform microstructure
C.Vacuum furnace: improve stability of material properties
D.Leveler: enhance strip shape and flatness
E.Slitting line: high-precision slitting suitable for ultra-thin materials
F.Sanding line: optimize surface consistency and texture.
Through precision equipment and optimized processes, the production line has successfully broken through seven core technical barriers for strip and foil products, including surface color difference control, thickness tolerance control, uniform annealing structure, high-precision slitting, and high-performance cleaning processes.
3) We provide one-stop custom processing from raw materials to finished products, ensuring stable supply of high-precision, high-performance products to our customers.
A.Materials: Pure titanium, titanium alloys, zirconium, nickel
Specifications: Thickness 0.02–1.0mm, width 350–670mm, customize according to requirement.
B.Surface treatment: Cleaning, sanding, degreasing, annealing; available in bright, matte and other function surface.
C.Dimensional & flatness control: Precise control of thickness, tolerances and surface flatness
D.Slitting & cutting to length: Suitable for ultra-thin wide strips with high yield and stable quality
E.Mass delivery: Annual capacity of 3,000 tons to meet large-volume, high-standard custom orders