Chemical composition
Nominal: mid-range where both limits are given, the cap where only a maximum is, balance takes the remainder. Exact specified ranges below.
| Element | Name | Content % | |
|---|---|---|---|
| Main elements3 elements | |||
| Cu | Copper | Bal. | |
| Al | Aluminium | 8.5 – 10% | |
| Fe | Iron | 2 – 4% | |
| Element | Name | Content % | |
|---|---|---|---|
| Minor & residual4 elements | |||
| Ni | Nickel (incl. cobalt) | ≤ 1% | |
| Mn | Manganese | ≤ 0.5% | |
| Si | Silicon | ≤ 0.25% | |
| Sn | Tin | ≤ 0.6% | |
Mechanical minima by form
Guaranteed values differ by form, size and delivery condition; quotations confirm the specification, form, size and condition.
| Form | Condition | Rm MPa | Rp0.2 MPa | A ≥ % | Other requirements and notes |
|---|---|---|---|---|---|
| Round rod (≤12 mm) | HR50, drawn and stress relieved | ≥ 620 (90 ksi) | — | ≥ 12 | Also specified: Rp0.5 ≥ 345 MPa (EUL) |
| Round rod (>12–25 mm) | HR50, drawn and stress relieved | ≥ 605 (88 ksi) | — | ≥ 15 | Also specified: Rp0.5 ≥ 305 MPa (EUL) |
| Round rod (>25–50 mm) | HR50, drawn and stress relieved | ≥ 580 (84 ksi) | — | ≥ 15 | Also specified: Rp0.5 ≥ 275 MPa (EUL) |
| Round rod (>50–80 mm) | HR50, drawn and stress relieved | ≥ 525 (76 ksi) | — | ≥ 20 | Also specified: Rp0.5 ≥ 255 MPa (EUL) |
| Round rod (>80 mm) | M20/M30/O20/O25/O30/HR50, as manufactured | ≥ 515 (75 ksi) | — | ≥ 20 | Also specified: Rp0.5 ≥ 205 MPa (EUL) |
| Hexagonal/octagonal rod and bar (≤25 mm) | HR50, drawn and stress relieved | ≥ 550 (80 ksi) | — | ≥ 15 | Also specified: Rp0.5 ≥ 240 MPa (EUL) |
| Hexagonal/octagonal rod and bar (>25–50 mm) | HR50, drawn and stress relieved | ≥ 540 (78 ksi) | — | ≥ 15 | Also specified: Rp0.5 ≥ 220 MPa (EUL) |
| Hexagonal/octagonal rod and bar (>50 mm) | M20, as hot rolled | ≥ 515 (75 ksi) | — | ≥ 20 | Also specified: Rp0.5 ≥ 205 MPa (EUL) |
| Shapes (all sizes) | M20/M30/O20/O25/O30/HR50, as manufactured | ≥ 515 (75 ksi) | — | ≥ 20 | Also specified: Rp0.5 ≥ 205 MPa (EUL) |
Where this grade is recommended
Matched in 1 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| Brake & drivetrain | Automotive & Racing | ≤ 300 °C | 5 / 5 | 72 |
Designations & equivalents
| UNS | C62300 |
| ASTM / AISI | B150 / B283 |
| GOST (Russia) | ≈ БрАЖ9-4 |
QAl9-4 contains no nickel and corresponds to C62300; for nickel-aluminium bronze (C63000 / CuAl10Ni5Fe4) order C63000.
Cross-references are common near-equivalents for search and shortlisting; substitution across standards requires clause-by-clause verification. All grades in one cross-reference table →
Applicable standards
2 specifications. Name the standard and its edition on the order.
Guaranteed values and required tests differ between specifications — see Mechanical minima by form for the figures per form.
Frequently asked questions
What is QAl9-4 Aluminium Bronze (C62300)?
QAl9-4 Aluminium Bronze (C62300) — Copper. General-purpose aluminium bronze — bearings, bushings, gears, valve seats and stems
What is the tensile strength of QAl9-4?
The specified minimum tensile strength is 605 MPa for the main product form. Minima for other forms and sizes are listed under "Mechanical minima by form" on this page.
Which standards cover QAl9-4?
ASTM B150/B150M, ASTM B283/B283M
Where is QAl9-4 typically used?
Brake & drivetrain (Automotive & Racing)
In which forms is QAl9-4 available?
Tube, plate, strip, bar, forgings, wire and other forms — sizes and delivery condition confirmed per order, with EN 10204 3.1 / 3.2 certification.
Same series
Download PDF datasheet
This grade’s datasheet as an A4 PDF — for filing, printing or forwarding to colleagues.
Download PDF datasheetSupply & enquiry
Tube & pipeφ1 – 219 × 0.25 – 25 mm
Plate4.76 – 80 mm
Barφ8 – 300 mm
Wire & filler metalsφ0.01 – 8 mmFor this grade we can supply, against your service conditions:
- Tube, plate, strip, bar, forgings, wire and more — with size range and lead time
- Chemistry and mechanical test report (EN 10204 3.1 / 3.2)
- Like-for-like alternatives and selection advice
- Applicable standards and inspection scope
Or email us: info@kochlin.com