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Ningbo Jintian Copper (Group) Co., Ltd.
Ningbo Jintian Copper (Group) Co., Ltd.
Code
Bronze

C5111 Bronze

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.


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