At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to ASTM B103. Phosphor bronze (copper-tin-phosphorus) plate, sheet, strip and rolled bar. Excellent spring properties, fatigue and corrosion resistance; mill product feeding stamped washers, spring clips and flat fastener components. Metric spec (values given MPa with (psi)).
Phosphor bronze (copper-tin-phosphorus) plate, sheet, strip and rolled bar. Excellent spring properties, fatigue and corrosion resistance; mill product feeding stamped washers, spring clips and flat fastener components. Metric spec (values given MPa with (psi)).
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| C51000 | C51000 | 5% Sn (Grade A) phosphor bronze |
| C51100 | C51100 | 4% Sn phosphor bronze |
| C52100 | C52100 | 8% Sn (Grade C) |
| C52400 | C52400 | 10% Sn (Grade D) |
| C50700 | C50700 | 2% Sn |
| C53400 | C53400 | phosphor bronze B-2, leaded |
| C54400 | C54400 | free-cutting phosphor bronze B-2 |
Minimum mechanical requirements per ASTM B103.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| C51000 O60 (annealed) | 290-400 (42-58 ksi) | 125 (18 ksi) | 40 | ~55 HRB |
| C51000 H04 (hard) | 515-605 (75-88 ksi) | 450 (65 ksi) | 10 | 87-93 HRB |
| C51000 H08 (spring) | 620-790 (90-115 ksi) | 550 (80 ksi) | 4 | 95 HRB |
| C52100 H04 (hard) | 570-660 (83-96 ksi) | 515 (75 ksi) | 12 | 90 HRB |
| C52400 H04 (hard) | 620-720 (90-104 ksi) | – | 12 | 93 HRB |
| Grade | Key Composition, % |
|---|---|
| C51000 | Sn 4.2-5.8, P 0.03-0.35, Cu remainder |
| C52100 | Sn 7.0-9.0, P 0.03-0.35, Cu remainder |
| C54400 | Sn 3.5-4.5, Pb 3.5-4.5, Zn 1.5-4.5, P 0.01-0.50, Cu rem |
UNS C51000/C52100/C52400; comparable to EN CuSn5/CuSn8, related rod standard ASTM B139
For the official ASTM International standards catalogue, see the ASTM International standards listing. This external reference is provided for standards identification; the purchaser should verify the current edition applicable to the order.
We supply ASTM B103 fasteners — bolts, screws, studs, nuts and washers as applicable — for energy, petrochemical, marine, structural and general engineering service, in a full range of sizes and finishes.
For technical documentation and quotations, buyers can also review the Ananka Fasteners manufacturing and supply range or contact the team through the fastener enquiry and technical support page.
Ananka Fasteners supplies every lot with full material traceability and third-party testing on request.
Phosphor bronze (copper-tin-phosphorus) plate, sheet, strip and rolled bar. Excellent spring properties, fatigue and corrosion resistance; mill product feeding stamped washers, spring clips and flat fastener components. Metric spec (values given MPa with (psi)).
Ananka Fasteners supplies C51000, C51100, C52100, C52400, C50700, C53400, C54400 to ASTM B103. See the Grades / Classes Covered table above for full details of each grade.
Minimum tensile strength, yield strength, elongation and hardness requirements vary by grade — see the Mechanical Properties table above for the complete breakdown.
We supply ASTM B103 fasteners — bolts, screws, studs, nuts and washers as applicable — for energy, petrochemical, marine, structural and general engineering service, in a full range of sizes and finishes.
Yes. For a quotation, provide the required fastener type, grade, nominal size, dimensional standard, quantity and any inspection or certificate requirements.
Need a fastener released to ASTM B103 for an industrial project? Send the required fastener type, grade, size, quantity and certification requirements to Ananka Fasteners. Our team can review the requirement and provide technical and commercial information for standard or custom configurations.
Recommended RFQ details: ASTM B103 requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per ASTM B103 and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
