Description:

Manganese bronzes alloys can operate under very high loads and speeds. However, bearing applications require reliable lubrication. Besides excellent mechanical qualities, these alloys have good corrosion resistance. The standard alloy in this group is high tensile C86300, which is comprised of copper, manganese, aluminum and iron. This combination raises the tensile strength to over 110,000 KSI.The lead in the alloy’s makeup improves machinability without materially affecting its mechanical properties.

Chemical Composition

HTB-1
Standard: BS 1400

Copper Alloys CU SN PB ZN FE NI AL MN SI Impurities
HTB 1 55 Min 1 0.5 Rem. 0.7 – 2 1 0.5-2.5 0.1-3 0.1 0.2

HTB-2
Standard: 304-1981

Copper Alloys CU SN PB ZN FE AL MN SI Impurities
HTB-2 55 Min 0.2 0.2 Rem. 1.5-3.25 3-6 4 0.1 0.2

HTB-3
Standard: BS 1400

Copper Alloys CU SN PB ZN FE NI AL MN SI Impurities
HTB 3 55 Min 0.2 0.2 Rem. 1.5-3.25 1 3-6 1.5-4 0.1 0.2

Physical Properties

Manganese Bronze

Grade B.S.
1400: 1985		 Nominal
Composition		 2% PS
N/mm Min		 Tensile Strength
N/mm Min		 Elongation
% Min		 Brinell
Hardness Min
HTB1 58/1/1/1/39 170 450 20 110
HTB1 58/1/2/3/36 – – – –
HTB1 58/2/2/4/34 450 750 8 180
HSBC4 – 410 755 12 200
HSBC3 – 305 635 15 165