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C95400
ISO N (non-ferrous)Aluminum bronze castings (Cu-Al-Fe type; strength can be raised by TQ50 heat treatment; commonly called Aluminum Bronze 9C). Number: UNS C95400. Standard: ASTM B148 (sand castings), B271/B271M (centrifugal castings), B505/B505M (continuous castings), B806 (permanent mold castings), B30 (ingot), SAE J461/J462, etc. (CDA Applicable Specifications).
🌐JIS and international equivalents
“Close” means composition or properties are not exactly the same. Before substituting, check the values in each standard.
| System | Designation | Number | Relation | Confidence |
|---|---|---|---|---|
| UNS | C95400 | UNS C95400 | — | |
| JIS | CAC702CAC702C for continuous casting; formerly AlBC2 | JIS H 5120 (castings) / H 5121 (continuous castings) | close | One source / reference[11][12][13] |
| EN | CuAl10Fe2-C | CC331G (EN 1982) | close | One source / reference[10] |
| GB | — | — | Not confirmed |
Differences between the equivalents (from the sources)
- JIS CAC702: The domestic casting maker J-Mate Copper Products lists "CAC702 and CAC702C as the JIS equivalents of C95400 (Cu 83 min, Al 10–11.5, Fe 3–5)" in a table. However, the compositions do not match: CAC702 is Cu 80.0–88.0, Al 8.0–10.5, Fe 2.5–5.0, Ni 1.0–3.0, Mn 0.1–1.5 (Wada Gokin). C95400 has higher Al (10.0–11.5) and Ni of 1.5 max with no lower limit. The CAC702 requirements of tensile strength 490 min, elongation 20 min and HB 120 min (Wada Gokin, Genyo) also differ from C95400's B148 M01 (515 min, 12 min, HB 150 min). CAC703 (formerly AlBC3) is a nickel aluminum bronze with Ni 3.0–6.0, and J-Mate matches CAC703 to EN CC333G. The sources say "equivalent", but because the composition differences are large, this table uses "close"
- EN CuAl10Fe2-C: The UK continuous casting maker Copper Alloys Ltd lists "GC CC331G", "BS1400 AB1" and "DIN 2.0940 (GK CuAl10Fe)" as equivalents of C95400. The composition range of CC331G could not be confirmed in primary sources (an aggregating database used only as a lead shows Al 8.5–10.5 and Fe 1.5–3.5, lower in Al and Fe than C95400). CuAl10Fe5Ni5-C (CC333G) is a nickel aluminum bronze with Ni 4–6 and is closer to C95500 than to C95400 (J-Mate matches CC333G to CAC703)
- GB : ZCuAl10Fe3 and others come up as leads, but no primary source stating a correspondence with C95400 was found
📄Related specifications (AMS, ASTM etc.)
Specifications called up on purchase orders and drawings. AMS are SAE aerospace material specifications, split by product form (bar, plate, forging), melting practice and heat treatment. Standard texts are paid, so only titles and scopes checked on the publishers’ public pages are shown.
| Spec | Scope | Confidence |
|---|---|---|
| ASTM B148-24 | Standard Specification for Aluminum-Bronze Sand CastingsAluminum bronze sand castings (M01 as cast, TQ50 heat treated). Includes C95400 (CDA's list of standards) | Agrees in 2+ sources[14][1] |
| ASTM B271/B271M-23 | Standard Specification for Copper-Base Alloy Centrifugal CastingsCentrifugal castings of copper alloys (M02 as cast, TQ50) | Agrees in 2+ sources[15][1] |
| ASTM B505/B505M-23 | Standard Specification for Copper Alloy Continuous CastingsContinuously cast round bar, tube and shapes (M07 as cast, TQ50). The source of Concast's composition and mechanical properties | Agrees in 2+ sources[16][2] |
| ASTM B30-23 | Standard Specification for Copper Alloys in Ingot and Other Remelt FormsRemelted ingot for castings (the Ingot column for C95400 in CDA's list) | Agrees in 2+ sources[17][1] |
| ASTM B806 | Permanent mold castings (M05) | One source / reference[1] |
| AMS 4870G | Aluminum Bronze, Centrifugal and Chill Castings, 85Cu - 11Al - 3.6Fe, As CastCentrifugal and chill castings, as cast (revised 2025-06). The sae.org page does not list a UNS number, and the correspondence with C95400 rests only on Copper Alloys Ltd's statement | One source / reference[18][10] |
| AMS 4871H | Aluminum Bronze, Centrifugal and Chill Castings 85Cu - 11Al - 3.6Fe Solution Heat Treated and TemperedCentrifugal and chill castings, solution treated and tempered (Stabilized 2015-09). The correspondence with C95400 rests only on Copper Alloys Ltd's statement | One source / reference[19][10] |
| AMS 4873G | Aluminum Bronze Alloy, Sand Castings, 85Cu - 11Al - 3.6Fe, Solution Heat Treated and TemperedSand castings, solution treated and tempered (revised 2024-09). The correspondence with C95400 rests only on Copper Alloys Ltd's statement | One source / reference[20][10] |
| AMS 4872C | Castings, Sand - Aluminum Bronze 85cu 11.2al 3.6fe, as CastSand castings, as cast. Cancelled in 1990 (CANCELLED) | One source / reference[21] |
All ASTM standards on Kezuriba: ASTM standards quick reference.
✈Main aerospace uses (as stated in the sources)
- Landing gear parts. The reasons given are corrosion resistance, wear resistance, fatigue properties and high strength (CDA Typical uses)[1][3]
- Concast and Copper Alloys Ltd also list landing gear parts as an application. In Concast's application index, "landing gear bushings and bearings" is C95510 (AMS 4880), and C95400 is in the "landing gear parts" column[2][3][10]
⚗Chemical composition (mass %)
As specified in ASTM B505/B505M-23 (Concast) / CDA (no distinction of standards) / ASTM B148 and B271 (ICAST Alloys)
| Element | Range | Confidence |
|---|---|---|
| Cu | ≥ 83 | Agrees in 2+ sources[1][2][5] |
| Al | 10.0 – 11.5 | Agrees in 2+ sources[1][2][6] |
| Fe | 3 – 5 | Agrees in 2+ sources[1][2][5] |
| Ni (includes Co) | The Ni value includes Co (CDA and Concast note) | Agrees in 2+ sources[1][2][5] |
| Mn | ≤ 0.5 | Agrees in 2+ sources[1][2][6] |
| Cu plus specified elements, total | Cu + sum of named elements 99.5% min | Agrees in 2+ sources[1][2] |
⚖Density
7.45 g/cm³
CDA: 0.269 lb/in³, specific gravity 7.45. Concast: 7.45 g/cm³ (20°C)
Calculate weight in C95400 →💪Mechanical properties
“Reference” values are not specified minimums from the standard but figures published by makers and others.
| Condition | Tensile MPa | Yield MPa | Elong. % | Hardness | Type of value |
|---|---|---|---|---|---|
| M01 (as sand cast) | ≥ 515 (75 ksi) | ≥ 205 (30 ksi, 0.5% extension under load) | ≥ 12 | HB 150 min (3000 kg) | Specified value (ASTM B148) Agrees in 2+ sources[1][6] |
| TQ50 (sand casting, quenched and tempered) | ≥ 620 (90 ksi; MPa is converted) | — | ≥ 6 | HB 190 min | Specified value (ASTM B148) One source / reference[1] |
| M02 (as centrifugally cast) | ≥ 515 (75 ksi) | ≥ 205 (30 ksi) | ≥ 12 | HB 150 min (CDA) | Specified value (ASTM B271/B271M) Agrees in 2+ sources[1][5][7] |
| TQ50 (centrifugal casting, quenched and tempered) | ≥ 620 (90 ksi; MPa is converted) | ≥ 310 (45 ksi; Bunting only) | ≥ 6 | HB 190 min (CDA). Bunting: 195 (typical value) | Specified value (ASTM B271/B271M) Agrees in 2+ sources[1][7] |
| M07 (as continuously cast) | ≥ 586 (85 ksi) | ≥ 221 (32 ksi, 0.5% extension under load) | ≥ 12 | HB 170 (typical value; Concast and Bunting) | Specified value (ASTM B505/B505M-23); only hardness is a typical value Agrees in 2+ sources[1][2][8] |
| TQ50 (continuous casting, quenched and tempered; Concast C95400HT) | ≥ 655 (95 ksi) | ≥ 310 (45 ksi) | ≥ 10 | HB 177 (Concast typical value) / 195 (Bunting typical value) | Specified value (ASTM B505/B505M-23); hardness is a typical value Agrees in 2+ sources[9][1][8] |
| M05 (as permanent mold cast) | ≥ 690 (100 ksi; MPa is converted) / typical 724 (105 ksi) | ≥ 275 (40 ksi) / typical 317 (46 ksi) | ≥ 10 / typical 11 | — | Specified value (presumed to be ASTM B806, since permanent mold casting is B806 in CDA's Applicable Specifications) plus typical values One source / reference[1] |
| M01 (as sand cast), typical values | 586 (85 ksi) | 241 (35 ksi) | 18 | HB 170 | Typical value (CDA) One source / reference[1] |
| TQ50 (sand cast), typical values | 724 (105 ksi) | 372 (54 ksi) | 8 | HB 195 | Typical value (CDA) One source / reference[1] |
| As cast (Copper Alloys Ltd continuous cast product) | 590 | 230 (proof stress) | 12 | HB 150 | Manufacturer value (not stated whether minimum or typical) One source / reference[10] |
1 MPa ≈ 145 psi (0.145 ksi). Hardness conversion · unit converter
🔧Machinability notes (as stated in the sources)
- CDA's machinability rating is 60 (basis: free-cutting brass C36000 = 100). Concast (60 for both C95400 and C95400HT) and Bunting Bearings also give 60[1][3][8]
- CDA workability: soldering and brazing good; gas shielded arc welding and shielded metal arc welding good; oxyacetylene welding not recommended. Heat treatment: stress relief 600°F; solution treatment 1600–1675°F held 1 hour then water quenched; annealing (tempering) 1150–1225°F[1][2]
📚Sources
Primary sources (public documents from makers, industry associations and standards bodies), numbered where each value is cited. Many are in Japanese.
- alloys.copper.org https://alloys.copper.org/alloy/C95400
- concast.com https://concast.com/c95400.php
- concast.com https://www.concast.com/files/reference-guide-download.pdf
- sandvik.coromant.com https://www.sandvik.coromant.com/en-us/knowledge/materials/workpiece-materials
- icastllp.com https://icastllp.com/material_db_pdf/ASTM%20B271%20Alumium%20Bronze%20UNS%20C95400.pdf
- icastllp.com https://icastllp.com/material_db_pdf/ASTM%20B148%20Aluminum%20Bronze%20UNS%20C95400.pdf
- catalog.buntingbearings.com https://catalog.buntingbearings.com/printitems/font-color-black-centrifugal-cast-cored-bar…
- catalog.buntingbearings.com https://catalog.buntingbearings.com/sl/printitem/-font-color-black-continuous-cast-solid-b…
- concast.com https://www.concast.com/c95400HT.php
- copperalloys.net https://copperalloys.net/alloys/c95400/
- jcp.joemate.co.jp https://www.jcp.joemate.co.jp/material/bronze-ASTM-EN/
- wadagoukin.co.jp https://www.wadagoukin.co.jp/material.html
- genyo-tec.co.jp https://genyo-tec.co.jp/copper-alloy/
- store.astm.org https://store.astm.org/b0148-24.html
- store.astm.org https://store.astm.org/b0271_b0271m-23.html
- store.astm.org https://store.astm.org/b0505_b0505m-23.html
- store.astm.org https://store.astm.org/b0030-23.html
- saemobilus.sae.org https://saemobilus.sae.org/standards/ams4870g-aluminum-bronze-centrifugal-chill-castings-8…
- saemobilus.sae.org https://saemobilus.sae.org/standards/ams4871h-aluminum-bronze-centrifugal-chill-castings-8…
- saemobilus.sae.org https://saemobilus.sae.org/standards/ams4873g-aluminum-bronze-alloy-sand-castings-85cu-11a…
- saemobilus.sae.org https://saemobilus.sae.org/standards/ams4872c-castings-sand-aluminum-bronze-85cu-112al-36f…
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