Phosphor Bronze is a premier copper alloy containing tin and phosphorus, renowned for superior spring resilience, high fatigue endurance, excellent wear resistance, and reliable corrosion protection. U.C. Metal supplies high-precision phosphor bronze strip coils and sheets for critical electrical contacts, relays, automotive switches, and precision stamped spring components.
Primary PB Grades
JIS C5191, JIS C5210, JIS C5102
Available Tempers
Annealed, 1/4H, 1/2H, H, EH, SH depending on forming complexity and spring tension requirements
Available Dimensions
Strip: 0.1 mm – 3.0 mm (Width: 4 mm – 1220 mm) · Sheet: 0.2 mm – 3.0 mm (up to 1220 × 3500 mm)
Chemical Composition
Reference chemical composition ranges by designation (weight %); confirm supplier-specific order limits before purchase:
| Element | C5191 | C5210 | C5102 |
|---|---|---|---|
| Copper (Cu) | Remaining | Remaining | Remaining |
| Phosphorus (P) | 0.03 ~ 0.35 % | 0.03 ~ 0.35 % | 0.03 ~ 0.35 % |
| Tin (Sn) | 5.5 ~ 7.0 % | 7.0 ~ 9.0 % | 4.5 ~ 5.5 % |
* Lead (Pb) ≤ 0.02%, Iron (Fe) ≤ 0.10%, Zinc (Zn) ≤ 0.20% are existing reference limits; confirm grade-specific order requirements.
Mechanical Properties & Hardness (Temper) Guide
Mechanical properties and hardness ranges across standard temper conditions:
| Grade | Temper | Hardness (HV) | Tensile Strength (N/mm²) | Elongation (%) |
|---|---|---|---|---|
| C5191 | O | 90 ~ 110 | 310 ~ 395 | ≥42 |
| 1/4H | 110 ~ 140 | 395 ~ 490 | ≥35 | |
| 1/2H | 140 ~ 170 | 490 ~ 590 | ≥20 | |
| H | 170 ~ 200 | 525 ~ 670 | ≥10 | |
| EH | ≥ 200 | ≥670 | ≥5 | |
| C5210 | 1/2H | 170 ~ 190 | 470 ~ 610 | ≥27 |
| H | 190 ~ 210 | 585 ~ 710 | ≥20 | |
| EH | 210 ~ 230 | 635 ~ 735 | ≥11 | |
| SH | 230 ~ 250 | ≥725 | ≥9 | |
| C5102 | O | — | ≥300 | ≥40 |
| 1/4H | 90 ~ 130 | 370 ~ 470 | ≥28 | |
| 1/2H | 130 ~ 170 | 470 ~ 570 | ≥15 | |
| H | 170 ~ 190 | 570 ~ 670 | ≥7 | |
| EH | ≥ 190 | ≥615 | ≥4 |
* Vickers Hardness (HV) from verified technical records. C5210 is formulated for high-fatigue spring components requiring 1/2H, H, EH, or SH temper conditions.
Manufacturer catalogue reference only; exact order specifications and test conditions require confirmation. — indicates no value listed, not zero.
International Standards Reference
JIS is the primary reference. The designations listed from the manufacturer’s reference table are starting points for enquiry, not a guarantee of substitution. Before ordering, confirm the applicable standard edition, product form, composition, temper, and test conditions. “–” means not verified here; it does not mean that no equivalent exists.
| JIS (primary) | China GB | US designation | ISO |
|---|---|---|---|
| C5191 | QSn6.5-0.1 | C51900 | CuSn6 |
| C5210 | QSn8-0.3 | C52100 | CuSn8 |
| C5102 | QSn5-0.2 | C51000 | CuSn5 |
Sources: manufacturer designation tables from Xinye Metal (C5191/C5210) and Boway (C5102); composition ranges cross-checked against Kiyomine Metal Industry. C5210 is a spring-grade designation under JIS H 3130, not JIS H 3110. These are reference comparisons, not interchangeability or delivery guarantees.
Supply Dimensions & Available Formats
- Strip / Slit Coil: Thickness: 0.1 mm – 3.0 mm · Width: 4 mm – 1220 mm · Coil ID: 200 mm, 300 mm, 400 mm, 500 mm.
- Sheet / Plate: Thickness: 0.2 mm – 3.0 mm · Width: up to 1220 mm · Length: up to 3500 mm.
- Custom Processing: In-house coil slitting and cut-to-length shearing available according to customer specifications.
Enquire About Phosphor Bronze Supply
Contact our technical team for grain direction advice, spring temper recommendations, custom slitting widths, and sample material availability.
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