This specification covers the information typically necessary to purchase Nitinol #1 round wires with a diameter ≥ 0.001" (0.025 mm) and ≤ 0.040" (1.016 mm).
|NiTi#1-CW||Nitinol #1 Cold Worked|
|NiTi#1-SE||Nitinol #1 Super-Elastic Straight Annealed|
Add desired suffix to select oxide finish as described below in
|ASTM A555||Standard Specification for General Requirements for Stainless Steel Wire and Wire Rods|
|ASTM F2005||Standard Terminology for Nickel-Titanium Shape Memory Alloy|
|ASTM F2004||Standard Test Method for Transformation Temperature of Nickel-Titanium Alloys by Thermal Analysis|
|ASTM F2063||Standard Specification for Wrought Nickel-Titanium Shape Memory Alloys for Medical Devices and Surgical Implants|
|ASTM F2516||Standard Test Method for Tension Testing of Nickel-Titanium Super-Elastic Materials|
The chemical composition of the material shall be equal to or better than those defined by ASTM F2063. Fort Wayne Metals meets or exceeds the following chemical composition requirements:
|Nickel||54.5 to 57.0 (Reference)|
|Carbon||< 0.05 (500 PPM maximum)|
|Cobalt||< 0.05 (500 PPM maximum)|
|Copper||< 0.01 (100 PPM maximum)|
|Chromium||< 0.01 (100 PPM maximum)|
|Hydrogen||< 0.005 (50 PPM maximum)|
|Iron||< 0.05 (500 PPM maximum)|
|Niobium||< 0.025 (250 PPM maximum)|
|Nitrogen plus Oxygen||< 0.05 (500 PPM maximum)|
|Any Single Trace Element||< 0.1|
|Total Trace Elements||< 0.25|
The fully annealed ingot austenite start (As) temperature shall be (-35)°C to (-10)°C when measured by DSC in accordance with ASTM F2004.
Materials ordered in the Super-Elastic Straight Annealed (NiTi#1-SE) condition will have a finish Af temperature between +10°C to +18°C when tested per Fort Wayne Metals procedures.
(in accordance with ASTM A-555)
|Specified Size (inches)||Standard Tolerance (inches)|
1) Tighter tolerance available upon request.
2) Out of round tolerance shall be one-half the total size tolerance<
|0.040 to 0.033||± 0.0008|
|< 0.033 to 0.024||± 0.0005|
|< 0.024 to 0.012||± 0.0004|
|< 0.012 to 0.008||± 0.0003|
|< 0.008 to 0.0048||± 0.0002|
|< 0.0048 to 0.001||± 0.0001|
All Mechanical Testing Conducted at 22°C ±2°C
The cold worked wire shall conform to the following mechanical properties:
|Cold Work||45% ±5%|
|Ultimate Tensile Strength||200,000 PSI minimum|
|Tensile Elongation at Failure||3% minimum (as measured by the above referenced document)|
|Ultimate Tensile Strength||> 180,000 PSI|
|Elongation at Break||> 10%|
|Loading Plateau||> 70,000 PSI at 4% strain|
|Unloading Plateau||> 20,000 PSI at 4% strain (after an initial strain to 8%)|
|Permanent Set after 8% Strain and Unloading||< 0.5%|
|Description||Order Code Suffix||Appearance|
|Etched and Mechanically Polished||EMP||Silver|
|Etched Bright||E||Bright Sliver|
|Light Oxide||LO||Gold to Brown|
|Dark Oxide||DK||Blue to Black|
|Black Oxide||BLK||Shiny Black|
Wire must be clean of contaminants, smooth, free from bumps, kinks, waves, scrapes, splits, burrs and other surface defects.
Each lot of material is to be manufactured from a single source of raw material under known process conditions.
Supplier will be notified of any revision changes to this specification.
A certificate of compliance to this product number shall accompany each shipment.
Each spool shall be labeled with the:
The wire must be wound evenly on the spools, with no breaks or tangles.
The maximum weight per spool shall be as follows unless specified otherwise on the purchase order.
|Wire Size||Maximum Weight||Spool Type|
|0.001" to 0.003"||0.5 pounds||2.5"x3", Din 80, Din 100, Din 125, Steeger, NE #2, Wardwell Bobbins|
|> 0.003" to < 0.012"||5 pounds||2.5"x3", Din 100, Din 125, Weldwire Reel|
|> 0.012" to 0.018"||10 pounds||Weldwire Reel|
|>0.018" to 0.035"||20 pounds||Weldwire Reel|