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Legislation Top 10 Reasons to Use Green Alloys™
Standard-Stocked Alloys


  • Product Description: Tin Bronze
  • Solids: 1"  to 6" OD
  • Tubes: 1" to 6" OD
  • Rectangles: Up to 10"
  • Standard Lengths: 144"
  • Shape/Form: Semi-finished; mill stock or near net shapes; anode; bar stock; billet/bloom; squares; hex; plate; profile or structural shape; flats/rectangular bar
  • Compliance: C91000 is compliant with key legislation including (1) Federal Safe Drinking Water Act 1974 &mdash SDWA, (2) Federal Reduction of Lead in Drinking Water Act 2011 and (3) California AB1953
  • » C91000 Spec Sheet (.pdf)

Typical Uses

  • Industrial piston rings, bearings

Similar or Equivalent Specification

CDA ASTM ASARCON SAE AMS Federal Military Other
C91000 B505       QQ-C-390, D2 MIL-B-16262, GRADE III  
  B505M       QQ-B-1005, COMP 9    

Chemical Composition (according to ASTM B505/B505M-14)

Cu%1 Sn% Pb% Zn% Fe% Ni%2 Sb% P%3 S% Al% Si%
  • 1In determining Cu min., Cu may be calculated as Cu + Ni.
  • 2Ni value includes Co.
  • 3For continuous castings, P shall be 1.5%, max.
  • Note: Cu + Sum of Named Elements, 99.4% min. Single values, unless otherwise noted, represent maximums.


Copper Alloy UNS No. Machinability Rating Density (lb/in at 68° F)
C91000 20 0.317

Mechanical Properties (according to ASTM B505/B505M-14)

Tensile Strength, min Yield Strength, at .5% extension under load min Elongation, in 2 in. or 50 mm min Brinell Hardness Remarks
ksi MPa ksi MPa % typical BHN  
30 207       105 (500 kg)  

Physical Properties (provided by CDA)

  US Customary Metric
Melting Point - Liquidus 1760° F 960° C
Melting Point - Solidus 1505° F 818° C
Electrical Conductivity 9% IACS at 68° F 0.054 MegaSiemens/cm at 20° C
Specific Heat Capacity 0.09 Btu/lb/°F at 68° F 377.1 J/kg at 293° C
Modulas of Elasticity in Tension 16000 ksi 110000 MPa

Fabrication Properties (provided by CDA)

Joining Technique Suitability
Soldering Excellent
Brazing Good
Oxyacetylene Welding Fair
Gas Shielded Arc Welding Fair
Coated Metal Arc Welding Fair

Thermal Properties (provided by CDA)

Treatment Temp./Time - US Temp./Time - SI
Stress Temperature 500 260
Solution Minimum    
Solution Maximum
Solution Time 0.0
Solution Medium
Precipitation Value    
Precipitation Time    
Precipitation Medium
Annealing Minimum    
Annealing Maximum    
Annealing Time  
Hot Works Minimum    
Hot Works Maximum