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Home » Products » C90300 Tin Bronze Lead Free "Navy G" » C90300 Tin Bronze Lead Free “Navy G” Round
C90300 Tin Bronze Round

C90300 Tin Bronze Lead Free “Navy G” Round

$2.60 – $89.06 in

C90300 Tin Bronze Lead Free “Navy G” is a hard, strong alloy with good corrosion resistance, high wear resistance and moderate machinability.

Product Price
SKU: C90300 Tin Bronze Lead Free "Navy G" Round Categories: , ,

Product Description

C90300 Tin Bronze, Lead Free “Navy G” is a hard, strong alloy with good corrosion resistance, high wear resistance and moderate machinability. C90300 is used as gears, pump components, marine fittings, valves and for potable water applications. It can be made as continuous cast, centrifugal cast, or sand cast.

Other terms for this alloy are: Navy “G” Bronze; ASTM B 505 Alloy 90300; SAE 620; ASTM B 271 Alloy 90300; SAE J461; SAE J462; QQC 390 Alloy 903; MIL-C-11866; CDA903; Gunmetal; Tin Bronze

Notice: The weights listed are the best estimates of the actual weights we will ship. They are a combination of the calculated theoretical weights and an average of actual weights. Our weights are conservative to the heavier side but there may be slight variations in weight from bar to bar.

The Physical, Fabrication and Thermal Properties shown here represent reasonable approximations suitable for general engineering use. Due to commercial variations in compositions and to manufacturing limitations, they should not be used for specification purposes.

C90300 Stock Allowances: Round Bar

Finished Outside DiameterInside DiameterOutside Diameter
Up to 1.999″ inclusive-0.0190″ to -0.0640″+0.0290″ to + 0.0390″
Over 2″ to 3.999″ incl.-0.0190″ to -0.0640″+0.0340″ to + 0.0440″
Over 4″ to 5″ incl.-0.0470″ to -0.1090″+0.0550″ to + 0.0710″
Over 5″ to 9″ incl.-0.0620″ to -0.1580″+0.0780″ to + 0.1100″
Over 9″ to 12″ incl.-0.0780″ to -0.1820″+0.0940″ to + 0.1340″
Over 12″ to 16″ incl.-0.1020″ to -0.2140″+0.1180″ to + 0.1660″

NOTICE: The weights listed are the best estimates of the actual weights we will ship. They are a combination of the calculated theoretical weights and an average of actual weights. Our weights are conservative to the heavier side but there may be slight variations in weight from bar to bar.

Equivalent Specifications

ASTM B505/B505M (Copper Alloy UNS No. 90300 Continuous Cast)

Reference Specifications

SAEFederal SpecificationMilitary SpecificationASTM
SAE J461
SAE J462		QQ-C-390MIL-C-11866ASTM B271
(Centrifugal Casting)

Equivalent specifications are verified and updated annually.
Specifications shown are current as of May 4, 2010.

Chemical Composition (%)**

CuSnNi*PbZnSbFePSAISi
86.0 –
89.0***		7.50 –
9.0		1.00
max.		0.30
max.		3.0 –
5.0		0.20
max.		0.20
max.		1.50
max.		0.05
max.		0.005
max.		0.005
max.
Sum of all named elements = 99.4%

Physical Properties

EnglishMetric
Melting Point – Liquidus1832°F1000°C
Melting Point – Solidus1570°F854°C
Density0.318 lb/in3 at 68°F8.80 gm/cm3 @ 20°C
Specific Gravity8.808.80
Electrical Conductivity12 %IACS @ 68°F0.069 MegaSiemens/cm@ 20°C
Thermal Conductivity43.20 Btu · ft/(hr · ft2 · °F) @ 68°F74.8 W/m · °K @ 20°C
Coefficient of Thermal Expansion10 · 10-6 per °F (68-392°F)18.0 · 10-6 per °C (20-200 C)
Specific Heat Capacity0.090 Btu/lb/°F @ 68°F377.1 J/kg · °K @ 293°K
Modulus of Elasticity in Tension14,000 ksi96,500 MPa

Physical Properties provided by CDA

Mechanical Properties

 EnglishMetric
Tensile Strength, min.44 ksi303 MPa
Yield Strength, min.22 ksi152 MPa
Elongation in 2 in. or 50 mm, min.18%18%

* Nickel including Cobalt
** Values shown pertain to ASTM B505/505M only
*** In determining copper minimum, copper may be calculated as copper plus nickel.

Machinability Rating 30 (Free Cutting Brass = 100)

Fabrication Practices

SolderingExcellent
BrazingGood
Oxyacetylene WeldingFair
Gas Shielded Arc WeldingFair
Coated Metal Arc WeldingFair

Fabrication Practices provided by CDA

Thermal Properties

Stress Relieving Temperatures500° F or 260° C
Time @ Temperature1 Hr. per inch of wall thickness
Responds to Heat TreatmentNo

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