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  • Home
  • product guide
  • Alloy
385-280

385/280 Brass Product Guide


Applications | Specifications | Mechanical and Chemical Data | Tolerances


Overview (385)

Brass alloys 385 and 280 have different mechanical properties but these two types of brass are similar in appearance. Additionally, 385 and 280 both have exceptional corrosion resistant qualities and perform well when hot working the material. Brass 385, also known as "architectural bronze", is highly machinable and is typically used in architectural applications and ornamental hardware. Brass 280, also known as "Muntz Brass or Muntz Metal", has a higher strength and hardness than other brass alloys and is typically used in marine applications.

 

Common Trade Names (385)

UNS C38500, CDA 385, C385, ISO CuZn39Pb3, British Free Machining Brass

 

Common Trade Names (280)

Muntz Brass, UNS 28000, CDA 280, C280, ISO CuZn40, 60/40 Brass

 

Other Resources

Safety Data Sheet | Weight Calculator | Mill Test Reports


Products

385/280 Rectangle Tube | 385/280 Square Tube


Applications

  • Architecture (385)
  • Marine Equipment (280)

Specifications

 

385

ASTM

B455

280

ASTM

B36



Physical Properties 385
 
-H02
-M30
Density 0.306 lb/in3 0.306 lb/in3
Ultimate Tensile Strength 54 ksi 60.2 ksi
Yield Tensile Strength 18 ksi 20.3 ksi
Shear Strength 33 ksi 34.8 ksi
Shear Modulus 5,370 ksi 5,370 ksi
Hardness Rockwell | Brinell N/A B65 | 116
Elongation at Break Percentage 17% 30%
Modulus of Elasticity 14,100 ksi 14,100 ksi
Poisson's Ratio 0.31 0.31
Machinability Percentage N/A 90%
Melting Point 1,610-1,630 °F 1,610-1,630 °F
Specific Heat 9.08 x 10^-2 BTU/lb-°F 9.08 x 10^-2 BTU/lb-°F
Thermal Conductivity 854 BTU-in/hr-ft^2-°F 854 BTU-in/hr-ft^2-°F
Electrical Conductivity 28% IACS 28% IACS

Physical Properties 280
 
-H01
-H02
Density 0.303 lb/in3 0.303 lb/in3
Ultimate Tensile Strength 56 ksi 70.3 ksi
Yield Tensile Strength 32 ksi 50 ksi
Shear Strength 35 ksi 44.2 ksi
Shear Modulus 5,800 ksi 5,800 ksi
Hardness Rockwell | Brinell B55 | 89 B75 | 120
Elongation at Break Percentage 20% 10%
Modulus of Elasticity 15,000 ksi 15,000 ksi
Poisson's Ratio 0.35 0.35
Machinability Percentage 40% 40%
Melting Point 1,650-1,660 °F 1,650-1,660 °F
Specific Heat 8.96 x 10^-2 BTU/lb-°F 8.96 x 10^-2 BTU/lb-°F
Thermal Conductivity 854 BTU-in/hr-ft^2-°F 854 BTU-in/hr-ft^2-°F
Electrical Conductivity 28% IACS 28% IACS


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