Cast aluminum bronze C95400 – UNS C95400
Heat-treatable aluminum-iron bronze for casting
Cast aluminum bronze with ≈ 11% Al and 4% Fe, the most used for bushings and wear parts: as cast it guarantees ≥ 515 MPa tensile strength, and after quenching and tempering (TQ50) it exceeds 620 MPa. Excellent resistance to wear, impact and corrosion in water and industrial atmospheres. Supplied as continuous-cast bar, centrifugally cast bushings and castings.
Designations and equivalents
| System | Designation |
|---|---|
| UNS | C95400 |
| W.Nr./EN | No direct equivalent; closest CC331G – CuAl10Fe2-C* |
| DIN | G-CuAl10Fe (2.0940, approx.)* |
| JIS | AlBC2 (approx.)* |
| Trade names | Aluminum bronze C954, AB-954 |
| Others | ASTM B30 (ingot); MIL-C-11866; SAE J461/J462 |
Standards by product form
| Form | Standard |
|---|---|
| Casting | ASTM B505/B505M (continuous casting) |
| Casting | ASTM B271/B271M (centrifugal) |
| Casting | ASTM B148 (sand), B763 (valves) |
| Casting | ASTM B806 (permanent mold) |
Tolerances and HS codes
- Forged bars (round and square): machining allowance from 2 mm (Ø 6–16 mm) to 24 mm (Ø 400–500 mm) on the diameter. E.g. Ø 100–125 mm finished: +7 mm, tolerance +6 / −0 (length up to 3,500 mm).
- Forged discs: allowance of 4 to 9 mm on the diameter and 3 to 11 mm on the height, plus-only tolerance.
- Cutting and machining: band saw −0 / +5 to +15 mm on length; waterjet +10 % of thickness on the diameter (min. 2 mm); machined parts −0 / +2 to +5 mm on the diameter. See the full tables (INF 002 and INF 003, the same for every alloy).
| Form | NCM (Brazil, 8 digits) | HS (international, 6 digits) | HTS (USA, 10 digits)* | CN (European Union, 8 digits)* |
|---|---|---|---|---|
| Forged bar | 7407.29.10 | 7407.29 | 7407.29.5000 | 7407 29 00 |
Tariff class: other copper alloys (by chemical composition, under the Chapter 72 Notes and Section XV Note 5).
*: US and EU codes for reference. NCM per current legislation (General Rules of Interpretation, Notes to Chapters 72, 74 and 75 and Section XV Note 5). Confirm the final code with your customs broker according to the item size and finish. HS = first 6 digits of the NCM.
Chemical composition (%)
ASTM B505 / B148 (UNS C95400)
| Element | Range (%) |
|---|---|
| Cu | ≥ 83.0 |
| Al | 10.0 – 11.5 |
| Fe | 3.0 – 5.0 |
| Ni (+Co) | ≤ 1.5 |
| Mn | ≤ 0.50 |
| Cu + named elements | ≥ 99.5 |
Mechanical properties
standard minimums (CDA / ASTM)
| Property | Value |
|---|---|
| Continuous cast, as cast (M07): tensile strength | ≥ 585 MPa |
| Continuous cast, as cast (M07): yield strength (0.5%) | ≥ 220 MPa |
| Continuous cast, as cast (M07): elongation | ≥ 12% |
| Sand cast, as cast (M01): tensile strength | ≥ 515 MPa |
| Sand cast, quenched and tempered (TQ50): tensile strength | ≥ 620 MPa |
| Hardness (as cast / TQ50) | ≈ 150 – 170 HB / ≈ 190 – 195 HB |
Typical physical properties
| Property | Value |
|---|---|
| Density | 7.45 g/cm³ |
| Melting range | 1,027 – 1,038 °C |
| Modulus of elasticity | 107 GPa |
| Electrical conductivity | ≈ 13% IACS |
| Thermal conductivity (20 °C) | ≈ 59 W/m·K |
| Thermal expansion (20–300 °C) | 16.2 µm/m·K |
| Magnetic permeability (as cast) | ≈ 1.27 |
Heat treatment, welding and machining
| Item | Usual practice |
|---|---|
| Service temperature | Keeps much of its strength up to ≈ 300 – 400 °C*. Suitable for bearings and bushings under high loads and moderate speed, with lubrication. |
| Heat treatment | Quench (TQ50): solution treatment at ≈ 870 – 915 °C for 1 h, water quench, and tempering at ≈ 620 – 660 °C. Stress relief at ≈ 315 °C. |
| Welding | Good by TIG/MIG and covered electrode; consumables AWS A5.7 ERCuAl-A2 and A5.6 ECuAl-A2*. Good brazing and soft soldering. Oxyacetylene welding not recommended. |
| Machining | Fair machinability for a high-strength bronze (≈ 60, C36000 = 100). Short chip; carbide tooling. |
Typical applications
- High-load bushings, bearings and sleeves
- Gears, crown wheels and worm gears
- Guides, wear plates and shoes
- Valve and pump bodies and internals
- Screw nuts and press components
Alternatives: C95500 (with 3 – 5.5% Ni) for higher strength and seawater corrosion resistance; nickel-aluminum bronze C63000 as wrought bar; beryllium copper C17200 when much higher hardness is needed.
Frequently asked questions
What is the chemical composition of Cast aluminum bronze C95400?
Per ASTM B505 / B148 (UNS C95400): Cu ≥ 83.0; Al 10.0 – 11.5; Fe 3.0 – 5.0; Ni (+Co) ≤ 1.5; Mn ≤ 0.50; Cu + named elements ≥ 99.5.
Which standards cover Cast aluminum bronze C95400?
Casting: ASTM B505/B505M (continuous casting). Casting: ASTM B271/B271M (centrifugal). Casting: ASTM B148 (sand), B763 (valves). Casting: ASTM B806 (permanent mold).
Up to what temperature can Cast aluminum bronze C95400 be used?
Keeps much of its strength up to ≈ 300 – 400 °C*. Suitable for bearings and bushings under high loads and moderate speed, with lubrication.
Which materials can replace Cast aluminum bronze C95400?
C95500 (with 3 – 5.5% Ni) for higher strength and seawater corrosion resistance; nickel-aluminum bronze C63000 as wrought bar; beryllium copper C17200 when much higher hardness is needed.
