What material is C61300 copper - Knowledge

1.What material is C61300 copper?

C61300 is a leaded aluminum bronze alloy, recognized for its excellent combination of strength, wear resistance, corrosion resistance, and machinability. It falls under the UNS (Unified Numbering System) for metals and alloys, widely used in industrial applications requiring durability under harsh conditions.

2.What is the chemical composition of C61300 copper?

The chemical composition of C61300 is strictly regulated to ensure its performance, with key elements and their ranges as follows (per ASTM B148/B148M and SAE J463 standards):

Element	Weight Percentage (Typical)	Standard Range
Copper (Cu)	86.5%	84.0–88.0%
Aluminum (Al)	9.0%	8.5–10.0%
Iron (Fe)	3.0%	2.0–4.0%
Lead (Pb)	1.5%	1.0–2.0%
Nickel (Ni)	0.05%	≤0.5% (max)
Zinc (Zn)	0.03%	≤0.5% (max)
Manganese (Mn)	0.02%	≤0.5% (max)
Other Impurities	≤0.3% (total)	≤0.5% (total, max)

Copper (Cu): The base element, providing fundamental metallic properties and ductility.

Aluminum (Al): Enhances strength, corrosion resistance (especially in marine or chemical environments), and forms a protective oxide layer.

Iron (Fe): Improves wear resistance, hardness, and structural stability at high temperatures.

Lead (Pb): Boosts machinability by acting as a lubricant during cutting or drilling, reducing tool wear.

Trace Elements: Nickel, zinc, and manganese are present in minimal amounts, with no significant impact on core performance.

info-444-450 info-438-442

3.What is the hardness of C61300 copper?

The hardness of C61300 varies based on heat treatment condition and manufacturing process (e.g., casting, forging, or cold working). Below are the typical hardness values for common conditions (tested via Brinell Hardness Test, BHN, or Rockwell Hardness Test, HR):

1. As-Cast Condition (Most Common for C61300)

Brinell Hardness (BHN): 180–220 (tested with 3000 kg load, 10 mm ball)

Rockwell Hardness (HRB): 85–95

Vickers Hardness (HV): 190–230

2. Heat-Treated Condition (Solution Annealed + Aging)

Solution annealing: Heated to 815–870°C (1500–1600°F), quenched in water or air.

Aging: Held at 480–540°C (900–1000°F) for 2–4 hours, then air-cooled.

Resulting Hardness: Brinell 240–280 BHN / Rockwell HRC 25–30.

3. Cold-Worked Condition (e.g., Forged or Cold-Drawn)

Hardness increases with cold working due to strain hardening.

Typical Hardness: Brinell 200–250 BHN / Rockwell HRB 90–100.

Key Notes on Hardness:

Hardness is inversely related to ductility: Higher hardness (e.g., heat-treated) reduces ductility but enhances strength and wear resistance.

As-cast C61300 balances hardness and machinability, making it suitable for components like gears, bearings, and valves.

Supplementary Information (Relevant to Practical Use)

Mechanical Properties (Context for Hardness):

Tensile Strength (As-Cast): 550–650 MPa (80–94 ksi)

Yield Strength (As-Cast): 275–350 MPa (40–51 ksi)

Elongation (As-Cast): 15–25% (in 50 mm)

Applications: Valves, pumps, gears, bearings, bushings, marine hardware, and industrial fasteners-especially in environments with friction, corrosion, or heavy loads.