ToughMet® Nickel Bronze 729 / C729 / C72900 - Farmers Copper

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ToughMet® Nickel Bronze 729 / C729 / C72900 Home Back to Previous Copper Nickel C72900 Toughmet Copper Nickel Tin

ASTM B249, ASTM B740, ASTM B929, AMS-4596B,UNS C72900

Specs Soldering Oxyacetylene Welding

Farmers Copper Ltd. maintains an extensive inventory of Materion spinodal alloy ToughMet 3 Copper Nickel Tin C729. Copper alloy 729 is an excellent alternative to nickel alloys, aluminum bronzes, and beryllium copper. C729 ToughMet alloys are anti-galling, free of lead and beryllium, and show excellent corrosion and stress corrosion cracking resistance in seawater applications. ToughMet (C72900) has exceptional high strength, excellent machinability, and is non-magnetic.

Farmers Copper has the following specs for C729 copper nickel in stock:

• ASTM B249
• ASTM B740
• ASTM B929
• AMS-4596B
• UNS C72900

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C72900 Toughmet Copper Nickel Tin Shapes

Sheet

Round Bar

Hollow Bar

C72900 Toughmet Nickel Bronze Sizing

Round Bar (3/8” dia to 9-1/4”)

Hollow Bar (Upon Request)

Sheet (Upon Request)

C72900 Toughmet Copper Nickel Tin Applications

• Drilling and mining equipment
• Aircraft bearings and bushings
• Pump parts
• Thrust washers
• Electrical
• Industrial
• Marine

Industries

Farmer’s Copper Ltd. extends its services throughout many industries. We provide the raw copper alloy materials in various standard shapes as well as custom cut copper alloys.

Aerospace

Defense

Health/Food

Marine

Oil & Gas

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Our C72900 Toughmet Copper Nickel Tin Inventory & Properties

Farmer’s diverse inventory of products and services offered provides our customers the largest and most extensive selection of alloys available, cut to precise specifications, and delivered with total quality control.

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Chemical Properties

Element	Cu (1,2)	Pb(3)	Sn	Zn	Fe	Ni(4)	Mg	Mn	Nb
Min %	7.5	14.5
Max (%)	Rem	0.02	8.5	0.50	0.50	15.5	0.15	0.30	0.10
(1) Cu + Sum of Named Elements 99.7% min. (2) Cu value includes Ag. (3) 0.005% Pb max. for hot rolling. (4) Ni value includes Co.

Physical Properties

Melting Point - Liquidus°F	2039
Melting Point - Solidus°F	1742
Densitylb/cu in. at 68°F	0.323
Specific Gravity	8.94
Electrical Conductivity% IACS at 68°F	7.8(1)
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F	17
Coefficient of Thermal Expansion 68-57210⁻⁶ per °F (68 – 572°F)	9.1
Specific Heat CapacityBtu/ lb /°F at 68°F	0.09
Modulus of Elasticity in Tensionksi	18500
Modulus of Rigidityksi	7500
(1) Aged condition

Fabrication Properties

Alloy	Joining Technique	Suitability Level
C10100	Soldering	Excellent
Brazing	Excellent
Oxyacetylene Welding	Good
Gas Shielded Arc Welding	Excellent
Coated Metal Arc Welding	Excellent
Spot Weld	Excellent
Seam Weld	Excellent
Butt Weld	Excellent
Capacity for Being Cold Worked	Excellent
Capacity for Being Hot Formed	Excellent
Capacity for Being Cold Worked	Excellent
Capacity for Being Hot Formed	Good

Mechanical Properties

Form	Temper	Temper Code	Tensile Strength (ksi)	YS-0.2% Offset	YS-0.5% Ext(ksi)	YS-0.05% Offset	Elongation (%)
Strip
1/2 Hard and Spinodal Hardened (1/2 TS)	TS02	145 Min for Standard	125 Min for Standard 3	3 Typ
1/4 Hard and Spinodal Hardened (1/4 TS)	TS01	130 Min for Standard	105 Min for Standard	4 Typ
3/4 Hard and Spinodal Hardened (3/4 TS)	TS03	155 Min for Standard	135 Min for Standard	2 Typ
Hard and Spinodal Hardened	TS04	165 Min for Standard	145 Min for Standard	2 Typ
Mill-hardened Temper, TM - 1/2 Hard	TM02	105 Min for Standard	90 Min for Standard	80 Min for Standard	15 Typ
TM00	95 Min for Standard	75 Min for Standard	70 Min for Standard	22 Typ
Mill-hardened Temper, TM - Hard	TM04	115 Min for Standard	105 Min for Standard	95 Min for Standard	10 Typ
Mill-hardened Temper, TM - XHMS Spring	TM08	150 Min for Standard	140 Min for Standard	125 Min for Standard	2 Typ
Mill-hardened Temper, TM -XHM - Extra Hard	TM06	130 Min for Standard	120 Min for Standard	105 Min for Standard	6 Typ
Solution Heat Treated	TB00	64 Min for Standard	24 Min for Standard	32 Typ
Solution Heat Treated and Cold Worked: 1/2 Hard	TD02	85 Min for Standard	65 Min for Standard	8 Typ
Solution Heat Treated and Cold Worked: 1/4 Hard	TD01	75 Min for Standard	50 Min for Standard	18 Typ
Solution Heat Treated and Cold Worked: 3/4 Hard	TD03	95 Min for Standard	80 Min for Standard	3 Typ
Solution Heat Treated and Cold Worked: Hard	TD04	100 Min for Standard	85 Min for Standard
Spinodal Hardened-Low Strength (ATLS)	TX00	120 Min for Standard	95 Min for Standard	6 Typ
* Measured at room temperature, 68°F (20°C).

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As a leading copper, brass, & bronze alloys supplier, Farmers Copper Ltd. attributes our success to serving our customers, through our service-minded employees and material readily available for prompt, accurate deliveries of copper, brass, bronze, stainless steel and other metal alloys.

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