C5111 Bronze

Grade Name

C5111 Phosphor Bronze (Tin-Phosphorus Bronze)

Key Features

• High Elasticity & Wear Resistance: Tin (3.5–4.5%) and phosphorus (0.03–0.35%) enhance fatigue resistance.

• Corrosion Resistance: Suitable for weak acidic and humid environments.

• Machinability: Cold-working compatible with stamping and bending.

• Eco-Compliance: RoHS-compliant (Pb ≤0.05%).

Product Forms & Dimensions

Form	Size Range	Standards
Strip	Thickness 0.1–2.0mm, Width 10–600mm	JIS H 3110-2018
Plate	Thickness 0.5–50mm, Width 100–2000mm	ASTM B103-19
Wire	Diameter 0.2–12mm, Coil ≥3kg	JIS H 3270-2018
Rod	Diameter 3–150mm, Length 1–6m	EN 1654:1997
Tube	OD 5–100mm, Wall Thickness 0.5–10mm	DIN 17660

Chemical Composition

Element	Content (%)	Standard Range
Cu	Balance	Main Component (JIS H 3110)
Sn	3.5–4.5	Enhances Elasticity
P	0.03–0.35	Improves Wear Resistance
Pb	≤0.05	RoHS Limit
Fe	≤0.10	Impurity Control
Zn	≤0.30	Impurity Control

Physical Properties

Property	Value/Description
Density	8.86 g/cm³
Electrical Conductivity	15% IACS (20℃)
Thermal Conductivity	75 W/(m·K)
Thermal Expansion	18.0×10⁻⁶/℃ (20–200℃)

Mechanical Properties

Condition	Tensile Strength (MPa)	Elongation (%)	Hardness (HV)
Annealed (O)	350–450	≥30	80–100 HV
1/4 Hard (H01)	550–650	≥15	150–180 HV
Hard (H04)	≥650	≥5	≥200 HV

Core Advantages

1. Fatigue Resistance: Ideal for precision springs in cyclic loading.

2. Surface Versatility: Compatible with tin/nickel plating for enhanced durability.

3. Cost Efficiency: Direct cold-forming reduces post-processing steps.

Applications

• Electronics: Connector terminals, relay springs.

• Machinery: Bearing cages, wear-resistant shims.

• Automotive: Fuel injector springs, sensor components.

• Musical Instruments: Reeds and strings.

Processing Guidelines

• Cold Working: Limit deformation to ≤50% to prevent cracking.

• Welding: Use TIG welding followed by acid cleaning.

• Surface Treatment: Ensure thorough cleaning before plating.

FAQs

Q1: Differences between C5111 and C5191?

A: C5191 has higher tin content (5.5–7.0%) for higher elasticity but higher cost.

Q2: Suitability for high-temperature use?

A: Not recommended for >150℃; consider C5210 for elevated temperatures.

Standards

• JIS H 3110-2018: Phosphor bronze sheets, strips, and foils.

• ASTM B103-19: Phosphor bronze plate and strip standards.

• EN 1654:1997: European copper alloy strip standards.