C5191 Tin Bronze

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What Is C5191 Tin Bronze?

C5191 is a Japanese brand, and the Chinese standard is GB/T 13808-1992. It is a substance with high corrosion resistance in seawater.

Chinese name: C5191 Tin bronze
National standard number: QSn6.5-0.1
Standard: GB/T 13808-1992
Characteristics: high corrosion resistance in sea water, etc.

Introduction to the substance

Japanese brand: C5191—tin bronze
National standard number: QSn6.5-0.1
Standard: GB/T 13808-1992
Standard: GB/T 4423-1992

characteristic

It has high corrosion resistance in seawater, good mechanical properties, cold brittleness during cold working, only suitable for hot press processing, good machinability, easy welding and fiber welding, but has a tendency of corrosion cracking (season cracking).
C5191 tin phosphor bronze has high strength, elasticity, wear resistance and diamagnetism. It has good press workability in hot and cold conditions, and has high flame resistance to electric sparks. It can be welded and fiber welded, and it can be machined. Good, corrosion resistant in the atmosphere and fresh water.

Scope of application

C5191 is used to make springs and spring contact pieces with good conductivity, wear-resistant parts and diamagnetic parts in precision instruments, such as gears, brush boxes, vibrating plates, contactors, etc.

chemical composition

Copper Cu: margin
Tin Sn: 6.0～7.0
Zinc Zn: 0.3
Lead Pb: ≤0.02
Aluminum Al: ≤0.002
Iron Fe: ≤0.05
Phosphorus P: ≤0.10-0.25
Nickel: ≤0.2
Total impurities: 0.1

Mechanical properties

Tensile strength σb (MPa): ≥470
Elongation δ5 (%): ≥13
Note: Longitudinal room temperature tensile mechanical properties of bars
Sample size: diameter or distance between opposite sides 5～12

Heat treatment specification

Thermal processing temperature 750～770℃; annealing temperature 600～650℃