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ToughMet® 3 AT Copper Nickel Tin Alloy

ToughMet 3 AT is hot worked and spinodally hardened, exhibiting tensile strength up to 140 ksi in a copper-nickel-tin alloy along with excellent machinability.

To learn more about ToughMet 3 AT physical and mechanical properties, forms and sizes, download our ToughMet 3 AT data sheets. For information on tolerances, see the charts below.

USES AND APPLICATIONS

ToughMet 3 AT is used in bushings and bearings for aircraft, industrial equipment and heavy equipment. It is also used for oil and gas drilling hardware including rotarty steerable housings, kelly valve seats and pressure housings.

TOUGHMET® SPECIFICATIONS AND STANDARDS

ToughMet 3 AT meets UNS C72900. Rod is produced to AMS 4596, ABS 5849, MTL 4112, BMS 7-373 (Class 100 and Class 90). Tube is produced to AMS 4598 and ABS 5152. Plate is produced to AMS 4595 (Plate). ToughMet 3 AT is compliant to NACE MR0175/ISO 15156. 

ROD TOLERANCE

Diameter (inches)  Diametral
Tolerance (inches) 
  Diameter (mm)   Diametral
Tolerance (mm)
 Over Including  Plus Minus     Over  Including  Plus  Minus
   1.00  0.040  0      25  0.50  0
 1.00  2.00  0.060  0    25  50  0.75  0
 2.00  3.00  0.100  0    50  75  1.3  0
 3.00  3.50  0.140  0    75  90  1.8  0
 3.50  4.00  0.240  0    90  100  3.0  0

Additional tolerances are per ASTM B249.

PLATE TOLERANCE 

 Thickness (inches)  Tolerance (inches)    Thickness (mm) Tolerance (mm) 
 Over Including   Plus Minus     Over Including   Plus Minus 
 0.188  0.205  0.020  0    5.0  8.0  0.60  0
 0.205  0.300  0.024  0    8.0  13.0  0.80  0
 0.300  0.500  0.030  0    13.0  20.0  1.00  0
 0.500  0.750  0.038  0    20.0  30.0  1.20  0
 0.750  1.00  0.046  0    30.0  40.0  1.40  0
 1.00  1.50  0.056  0    40.0  60.0  1.70  0
 1.50  3.00  0.066  0    60.0    3.175  0
 3.00    0.125  0          

Tolerances are for widths up to 24 inches (610 mm). Specific width tolerance is plus 0.25/minus 0.00 inches (plus 6.35 minus 0.00 mm). Additional tolerances are per ASTM B248

TUBE TOLERANCE

 Outside Diameter (inches) Diametral
Tolerance (inches)
   Outside Diameter (mm)  Diametral
Tolerance (mm)
 Over Including     Over  Including
 0.750  1.25  ±0.020    20  30  ±0.50
 1.25  2.50  ±0.030    30  38  ±0.75
 2.50  6.00  ±0.060    38  150  ±1.50
 6.00    ±0.060    150    ±1.50

Additional tolerances are per ASTM B505.