flat nitinol wire

Flat Nitinol Wire for Precision Elastic and Thermal Drive Applications

Baoji Hanz Metal Material Co., Ltd. supplies flat nitinol wire in one standard size: T0.25 mm × 2.5 mm. Nickel-titanium is the alloy here (Ni 54.5–57.0 wt%, Ti balance). The wire meets GB 24627-2009. ASTM F2063-18 is covered as well. Figures for the standard superelastic grade look like this: tensile strength ≥1100 MPa, elongation ≥9%, Af temperature 0–20 °C. Other dimensions can be ordered too. The same goes for different Af temperatures and surface conditions. Stock orders start at 200 m. Custom runs start at 500 m.

Why Flat Cross-Section Matters in Nitinol Applications

Round wire often causes problems in planar elastic structures. Narrow thermal actuators run into the same trouble. Stress ends up uneven across the contact surface. Getting the part flat during forming becomes harder. Under cyclic loads, fatigue life drops too. Ask for the in the width and temper your process needs, and we will quote it against your drawing.flat nitinol wire.

That problem goes away with a rectangular cross-section. Hold the width-to-thickness ratio steady. Load then spreads more evenly. Stress concentration at the contact interface drops. For thin elastic parts, a flat profile beats a round one by a wide margin. Narrow thermal actuators and precision clamping structures gain the same benefit.

In some applications, the design spec has to spell out the geometry. The same spec may set how steady the actuation must be. It may also say how long the part must last under fatigue. When that happens, the cross-section you pick gives you numbers to check.

Technical Specifications

Material Characteristics

Superelasticity stays steady in this product under the standard Af spec of 0–20 °C. Bend it or compress it over and over. Keep inside the designed strain range as you do. It always returns to its original shape. Dimensions hold within the tolerances listed above, batch after batch. The edges show no burrs. Flatness stays in control. Both points count for the wire in micro-scale stamping or precision assembly.

For thermal drive applications, the Af transformation temperature can be specified anywhere in the −20 °C to 100 °C range, allowing the actuation point to be matched to the thermal environment of the end product.

Three surface conditions are available: black oxide, lightly oxidized (golden yellow to brown), and clean bright. The standard product ships in bright condition on spools.

Typical Application Areas

Medical device uses include dental orthodontic arch wires. Minimally invasive clips are another. Clamping plates fit here too. So do flexible interventional components. More surface contact area comes from a flat cross-section. Friction can also drop in guided channel assemblies. Compare that with round wire of the same size.

Industrial uses cover temperature-controlled actuator strips. Sensor elastic sheets are one more example. Precision switch clips and memory locking parts also belong here. With shape memory, the material can work as an actuator element. Temperature triggers a direct response. Which Af specification you choose sets how it responds.

Need a specific shape rather than wire on a spool? Custom formed parts are also available.

Manufacturing and Quality Control

Baoji Hanz Metal Material Co., Ltd. runs production in-house. Vacuum melting happens there. So do cold working and final heat treatment. Because of that, chemical composition holds steady from batch to batch. Phase transformation behavior does too.

Chemical composition gets checked on every batch. So do the mechanical properties and the DSC phase transformation temperature. Test reports come with the goods if you ask for them. GB 24627-2009 and ASTM F2063-18 are followed the whole way through production.

Baoji, Shaanxi is where the facility sits. China has a well-established cluster of titanium and specialty alloy makers in that region.

Customization Options for Flat Nitinol Wire

Stock of the T0.25 mm × 2.5 mm size is standard. It comes with a bright surface finish and a superelastic Af of 0–20 °C. Other specs can be set per order using the parameters below:

• Thickness: 0.013–1.0 mm
• Width: 0.045–2.5 mm
• The Af transformation temperature sits between −20 °C and 100 °C
• Finish options include black oxide and light oxidation. A clean bright surface is available too
• Once the shape is set, parts go out cold-worked. You can order them annealed as well
• Packing comes as spool or coil. Straight pieces cut to a fixed length are also an option

Wire can be machined into finished formed parts too. Send the drawing over, or just the dimensions you need. We will check whether it can be done and get back to you on lead time.

Request a Quote or Technical Consultation

Got specs to discuss? Or maybe you'd like a sample, or a price for flat nitinol wire. Send your requirements to the address below. Tell us the dimensions you're after and the Af temperature. Include the quantity too, and any drawings that apply.

Frequently Asked Questions

Q: My size isn't on your standard list. Can I order it anyway?

A: Yes. We support thickness from 0.013 to 1.0 mm and width from 0.045 to 2.5 mm, as long as the width-to-thickness ratio constraint holds (2 < γ ≤ 7). For custom orders the minimum is 500 m. Lead time runs 20–30 working days.

Q: How is the Af transformation temperature specified?

A: The Af temperature can be set anywhere in the −20 °C to 100 °C range during the heat treatment stage. For the standard superelastic product, Af is 0–20 °C. Specify your target Af when requesting a quote.

Q: What standards do you build this product to?

A: Each item we ship meets GB 24627-2009 and ASTM F2063-18. Rules for chemical composition come from those two standards. They cover dimensional tolerances as well.

Q: Which surface conditions can you get? What does the standard product use?

A: Three options are available: black oxide, lightly oxidized (golden yellow to brown), and clean bright. The standard stocked product ships with a clean bright surface.

Q: What documentation is provided with each order?

A: Batch-by-batch test reports covering chemical composition, mechanical properties, and DSC phase transformation temperature are provided upon request.

Q: Is in-stock material available, and what is the minimum quantity?

A: In-stock this product in the standard size (T0.25 mm × 2.5 mm, bright, superelastic) is available from 200 m. Custom specifications require a minimum of 500 m.

Contact Us

Email: hztech05@hanztech.cn: Baoji Hanz Metal Material Co., Ltd., Baoji, Shaanxi, China. We supply flat nitinol wire in standard and custom specifications for medical and industrial applications.