Nitinol Wire

Precision Nitinol Alloys

Nitinol Alloy Code

The Active Af temperature is a critical determinant of the alloy's superelastic performance. While the primary Ni composition range (54.5 %~ 57.0 mass%) adheres to the ASTM F2063-18 standard specification, even slight shifts in chemical composition significantly impact the final Af. Consequently, detailed compositional grading of Nitinol is essential. At ZHP Medical, we mandate the use of a verified and detailed Nitinol code to ensure absolute clarity and traceability for every alloy, guaranteeing consistent performance.

Alloy Code	A	B	C	D	E	S	K	J	L	M	T
*Active Af after heat treament，℃	70±10	30±10	17±7	10±7	0-15	25±5	30±10	-30±10	-20±15	40±10	50±10

* The real active Af temperature may vary with actual composition and thermo-mechanical history of the product.

Delivery Status

● Straightened super-elastic (SE)

● Cold worked (CW)

Typical Alloy Features and Applications

The transformation temperatures and mechanical properties for typical grades of Nitinol are presented in the table below:

Typical Nitinol wire important data, including typical applications

Alloy Code	Straightened Super-Elastic（SE）						Typical Medical Application
Alloy Code		UTS MPa	Elongation %	Upper PlateauStress UPS MPa	Permanentset after 6% strain %	Active Af ℃	Typical Medical Application
D	≥1300	≥10	≥480	＜0.5	+3~+17	Guidewires, braided stents,stoneretrievers, snares,dental files, IUD, sutrues, etc.
C	≥1150	≥10	≥440	＜0.5	+10~+24
S	≥1000	≥10	≥400	＜0.5	+20~+30

* All Mechanical Testing Conducted at 22°C+/-2°C per ASTM F2516-18

Wire Surface Status

● Black oxide

● Light oxide（varies from golden yellow to brown）

● Etched

● Shinny

● Gloss®;（ultra shinny surface）

● Centerless ground

Shape

● Round, Square, Triangle, Flat, Rope

Packaging of Wires

● Spool: wire must be wound evenly on the spools, without breaks or tangles;

● Fixed Length: ZHP Medical can cut wire at customer’s requested length;

● Coil

* Other packaging method could be discussed with ZHP Medical.

Nitinol Round Wire Diameters and Tolerances

Wire Diameter	Tolerance
4.000≥D≥2.000mm	±0.020mm
2.000＞D＞1.500mm	±0.010mm
1.500≥D＞1.000mm	±0.010mm
1.000≥D＞0.350mm	±0.007mm
0.350≥D＞0.260mm	±0.007mm
0.260≥D＞0.150mm	±0.005mm
0.150≥D＞0.080mm	±0.004mm
0.080≥D＞0.050mm	±0.003mm
0.050≥D≥0.013mm	±0.002mm