ASTM B171 / B171M

This specification establishes the requirements for copper-alloy plate, sheet, and circles cut from plate and sheet for pressure vessels, condensers, and heat exchangers.The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

Chemical Properties

UNS Designation Copper,incl Silver Tin Nickel,incl Cobalt Manganese, max Lead Iron Zinc Aluminum Chromium Other Named Elements
C36500 58.0-61.0 0.25 - - 0.25-0.7 0.15 remainder - - -
C44300 70.0-73.0 0.8-1.2 - - 0.07 0.06 remainder - - 0.02-0.06 As
C44400 70.0-73.0 0.8-1.2 - - 0.07 0.06 remainder - - 0.02-0.06 Sb
C44500 70.0-73.0 0.8-1.2 - - 0.07 0.06 remainder - - 0.02-0.06 P
C46400 59.0-62.0 0.5-1.0 - - 0.20 0.10 remainder - - -
C46500 59.0-62.0 0.5-1.0 - - 0.20 0.10 remainder - - 0.02-0.06 As
C61300B remainder 0.20-0.50 0.15 0.20 0.01 2.0-3.0 0.10C 6.0-7.5 - 0.10 Si
0.015 Pi
C61400 remainder - - 1.0 0.01 1.5-3.5 0.20 6.0-8.0 - 0.015 P
C63000 remainder 0.20 4.0-5.5 1.5 - 2.0-4.0 0.30 9.0-11.0 - 0.25 Si
C63200 remainder - 4.0-4.8D 1.2-2.0 0.02 3.5-4.3D - 8.7-9.5 - 0.10 Si
C70600 remainder - 9.0-11.0 1.0 0.05C 1.0-1.8 1.0C - - -
C70620 86.5 min - 9.0-11.0 1.0 0.02 1.0-1.8 0.50 - - 0.05 C
C71500 remainder - 29.0-33.0 1.0 0.05C 0.40-1.0 1.0C - - -
C71520 65.0 min - 29.0-33.0 1.0 0.02 0.40-1.0 0.50 - - 0.05 C
0.02 P
0.02 S
C72200 remainder - 15.0-18.0 1.0 0.05C 0.50-1.0 1.0C - 0.03-0.70 0.03 Si
0.03 Ti
Note A: Designation established in accordance.
Note B: When the product is for subsequent welding applications, and is so specified by the purchaser, chromium shall be 0.05 % max, cadmium 0.05 % max, zirconium 0.05 % max and zinc 0.05 % max.
Note C: When the product is for subsequent welding applications, and is so specified by the purchaser, zinc shall be 0.50 % max, lead 0.02 % max, phosphorus 0.02 % max, sulfur 0.02 % max, and carbon 0.05 % max.
Note D: Iron content shall not exceed the nickel content.

Products