Huizhou Pengchengrui Technology Co., Ltd.

The specifications of nickel titanium alloy wire (NiTi) mainly revolve around six dimensions: size, tolerance, composition, performance, surface, and standards, covering medical, industrial, precision electronics, and other scenarios. The following is a complete specification system.

1、 Core size specifications

（1）Diameter range (Φ)

Microfilaments/medical grade: 0.0127mm~1.0mm (commonly used for nerve interventions, stents, and guide wires, 0.02~0.5mm)

Conventional industrial grade: 1.0mm~3.0mm (sensors, fasteners, drive components)

Large diameter/customized: 3.0mm~7.0mm (tooling, structural components)

（2）Diameter tolerance

（3）Flat wire/irregular wire

Thickness: starting from 0.013mm, width: starting from 0.05mm, with stricter tolerances

Length: Plate mounted 50/100/500/1000m, straight wire 100/200/500mm, customizable for several kilometers

2、 Chemical Composition (Medical/Standard Grade, ASTM F2063/GB 24627)

Ni: 54.5% to 57.0%, Ti: balance (43% to 45.5%)

Impurity control (wt%):

C ≤ 0.05，O ≤ 0.05，N ≤ 0.01，H ≤ 0.002

Fe, Cr, Co, Cu, etc. ≤ 0.05-0.1

3、 Key Performance Specifications

（1）Functional characteristics (core)

Super elasticity: strain of 8% to 10%, residual deformation after unloading ≤ 0.5%, recovery rate ≥ 98%

Shape memory: Phase transition temperature (Af) -50 ℃~150 ℃, commonly used 0 ℃~40 ℃, accuracy ± 1 ℃

Fatigue life: ≥ 1 × 10 ⁶ times (2% strain), medical stents can reach 380 million times

（2）Mechanical properties (typical)

Tensile strength (UTS): 1300-1500MPa (medical), ≥ 920MPa (industrial)

Yield strength: ≥ 480MPa (4% platform stress)

Elongation rate: ≥ 10%

Hardness: HV ≥ 350

（3）Surface and Corrosion Resistance

Roughness: Ra ≤ 0.4 μ m (medical polishing)

Surface state: Black oxidation, light oxidation, bright, super bright, passivated, acid washed

Corrosion resistance: Salt spray ≥ Grade 8, in compliance with ISO 10993 biocompatibility

4、 Execution standards

International: ASTM F2063 (Nickel Titanium Alloy Wire for Medical Devices)

China: GB/T 24627-2023 (Nickel titanium alloy processed materials for surgical implants)

Other: ASTM F2516, ISO 5832-5

5、 Common applications and corresponding specifications

Medical intervention: Φ 0.02-0.5mm, tolerance ± 0.003-0.005, Af 10 ± 7 ℃, hyperelastic

Orthopedics/Orthodontics: Φ 0.5-1.5mm, shape memory, Af 30-40 ℃

Industrial sensor: Φ 1.0-3.0mm, high fatigue, stable phase transition temperature

Precision drive: Φ 0.1-2.0mm, super elastic, low residual deformation

Huizhou Pengchengrui provides nickel titanium memory alloy wire materials with diameters of 5mm, 6mm, and 0.02mm, available in three delivery states: black (with oxide layer), frosted acid wash, and mirror finish. We have the ability of deep processing and manufacturing, product molding, and solving technical problems for customers.