Bushing Materials: Brass & Bronze Grades and Chemical Composition
TECHNICAL MATERIAL REFERENCE
Boniu machines custom copper-alloy bushings to customer drawings, with achievable dimensional tolerances of ±0.01 mm (approximately ±0.000394 in). Choose the alloy and standard before confirming dimensions and inspection requirements.
| Capability | Range / specification |
|---|---|
| Dimensional tolerance | Achievable tolerance: ±0.01 mm (approximately ±0.000394 in), subject to feature, material and drawing review. |
| Machining size | No fixed size limit. Custom bore, outside diameter and length to drawing; final manufacturing feasibility confirmed during review. |
| High-tensile brass | CuZn25Al5Mn4Fe3; GB, US and EN reference grades listed separately below. |
| Other brass materials | H59 and H62 brass. |
| Tin bronze options | C93200, C90700, C93700 and C90500; specify the exact grade and casting standard with your drawing. |
| Quotation inputs | Drawing, units, alloy and standard, tolerances, quantity and operating conditions. |
US, GB and EN Grade Comparison
| Material family | China / GB reference | US / UNS reference | Europe / EN reference | Relationship |
|---|---|---|---|---|
| High-tensile brass | ZCuZn25Al6Fe3Mn3 | C86300 | CuZn25Al5Mn4Fe3-C / CC762S | Related alloys; Al/Mn limits differ. |
| H59 brass | H59 / T28200 | C28000 | CuZn40 / CW509L | Reference only; Cu and impurity limits differ. |
| H62 brass | H62 / T27600 | C27400 | CuZn37 / CW508L | Reference only; Cu limits differ. |
| Tin bronze: C93200 | No exact GB match declared | C93200 | CuSn7Zn4Pb7-C / CC493K | Related leaded bronze; GB 5-5-5 is a separate alloy. |
| Tin bronze: C90700 | ZCuSn10P1 (comparison) | C90700 | CuSn11P-C / CC481K (comparison) | Phosphorus and tin limits differ; no automatic substitution. |
| Tin bronze: C93700 | ZCuPb10Sn10 | C93700 | CuSn10Pb10-C / CC495K | Related 10-10 alloys; impurity limits differ. |
| Tin bronze: C90500 | ZCuSn10Zn2 | C90500 | CuSn10-C / CC480K (comparison only) | No direct EN equivalent declared; CC480K has much less Zn. |
| Additional 5-5-5 reference | ZCuSn5Pb5Zn5 | C83600 | CuSn5Zn5Pb5-C / CC491K | Correct 5-5-5 reference family; not C93200. |
Chemical Composition by Grade
All values are mass percent (wt.%). Ranges are reference limits, not batch test results. “Balance” means the remaining proportion. Unlisted elements are not assumed to be zero. UNS identifies an alloy; the purchase order must also state the applicable product/casting standard and edition.
These tables summarize the cited published alloy data, including producer-specific references where identified. They do not replace the complete standards. Confirm product form, casting route, edition and acceptance criteria against the material certificate before substituting grades.
CuZn25Al5Mn4Fe3-C / CC762S
EN 1982 reference
| Element | Content (wt.%) |
|---|---|
| Cu | 60–67 |
| Zn | balance |
| Al | 3–7 |
| Mn | 2.5–5 |
| Fe | 1.5–4 |
| Ni | ≤3 |
| Pb | ≤0.2 |
| Sn | ≤0.2 |
| Si | ≤0.1 |
| P | ≤0.03 |
| Sb | ≤0.03 |
Cu includes Ni. Published producer reference; confirm the applicable standard edition.
ZCuZn25Al6Fe3Mn3
GB/T 1176-2013 reference
| Element | Content (wt.%) |
|---|---|
| Cu | 60–66 |
| Zn | balance |
| Al | 4.5–7 |
| Fe | 2–4 |
| Mn | 2–4 |
| Si | ≤0.10 |
| Ni | ≤3.0 |
| Sn | ≤0.2 |
| Pb | ≤0.2 |
Related GB grade; Al and Mn limits differ from the EN grade.
C86300
UNS / ASTM B505/B505M-23 producer reference
| Element | Content (wt.%) |
|---|---|
| Cu | 60–66 |
| Zn | 22–28 |
| Al | 5–7.5 |
| Fe | 2–4 |
| Mn | 2.5–5 |
| Pb | ≤0.2 |
| Sn | ≤0.2 |
| Ni | ≤1 |
Cu minimum includes Ni; Ni includes Co. Related alloy, not an exact EN/GB equivalent.
H59 / T28200
GB/T 5231 grade reference
| Element | Content (wt.%) |
|---|---|
| Cu | 57–60 |
| Zn | balance |
| Pb | ≤0.5 |
| Fe | ≤0.3 |
Listed elements are published reference limits; obtain the complete specification for the agreed product form and edition.
H62 / T27600
GB/T 5231 grade reference
| Element | Content (wt.%) |
|---|---|
| Cu | 60.5–63.5 |
| Zn | balance |
| Pb | ≤0.08 |
| Fe | ≤0.15 |
Listed elements are published reference limits; obtain the complete specification for the agreed product form and edition.
C28000
US UNS reference
| Element | Content (wt.%) |
|---|---|
| Cu | 59–63 |
| Zn | balance |
| Pb | ≤0.09 |
| Fe | ≤0.07 |
Comparison only; copper and impurity limits differ from the GB alloy.
C27400
US UNS reference
| Element | Content (wt.%) |
|---|---|
| Cu | 61–64 |
| Zn | balance |
| Pb | ≤0.09 |
| Fe | ≤0.05 |
Comparison only; copper and impurity limits differ from the GB alloy.
CuZn40 / CW509L
EN designation; producer bar chemistry
| Element | Content (wt.%) |
|---|---|
| Cu | 59.5–61.5 |
| Zn | balance |
| Al | ≤0.05 |
| Fe | ≤0.2 |
| Ni | ≤0.2 |
| P | ≤0.10 |
| Pb | ≤0.2 |
| Si | ≤0.10 |
| Sn | ≤0.2 |
This is the cited producer’s USC bar specification, not universal EN limits or an exact H59 equivalent.
CuZn37 / CW508L
EN 13388 producer reference
| Element | Content (wt.%) |
|---|---|
| Cu | 62–64 |
| Zn | balance |
| Pb | ≤0.10 |
| Ni | ≤0.30 |
| Fe | ≤0.10 |
| Sn | ≤0.10 |
| Al | ≤0.05 |
| other | elements ≤0.10 |
Comparison only; copper range differs from H62.
C93200
US UNS / CDA reference
| Element | Content (wt.%) |
|---|---|
| Cu | 81–85 |
| Sn | 6.3–7.5 |
| Pb | 6–8 |
| Zn | 1–4 |
| Fe | ≤0.20 |
| P | ≤0.15 |
| Ni | ≤1 |
| Al | ≤0.005 |
| S | ≤0.08 |
| Sb | ≤0.35 |
| Si | ≤0.005 |
Cu minimum may include Ni; Ni includes Co. Cu + named elements ≥99.0%. CDA permits P ≤1.5% for continuous castings; use the contracted casting specification.
C90700
US UNS / CDA reference
| Element | Content (wt.%) |
|---|---|
| Cu | 88–90 |
| Sn | 10–12 |
| Pb | ≤0.50 |
| Zn | ≤0.50 |
| Fe | ≤0.15 |
| P | ≤0.30 |
| Ni | ≤0.5 |
| Al | ≤0.005 |
| S | ≤0.05 |
| Sb | ≤0.20 |
| Si | ≤0.005 |
Cu minimum may include Ni; Ni includes Co. Cu + named elements ≥99.4%. CDA permits P ≤1.5% for continuous castings; use the contracted casting specification.
C93700
US UNS / CDA reference
| Element | Content (wt.%) |
|---|---|
| Cu | 78–82 |
| Sn | 9–11 |
| Pb | 8–11 |
| Zn | ≤0.8 |
| Fe | ≤0.7 |
| P | ≤0.10 |
| Ni | ≤0.5 |
| Al | ≤0.005 |
| S | ≤0.08 |
| Sb | ≤0.5 |
| Si | ≤0.005 |
Cu minimum may include Ni; Ni includes Co. Cu + named elements ≥99.0%. CDA permits P ≤1.5% for continuous castings; use the contracted casting specification. Steel-backed castings: Fe ≤0.35%.
C90500
US UNS / CDA reference
| Element | Content (wt.%) |
|---|---|
| Cu | 86–89 |
| Sn | 9–11 |
| Zn | 1–3 |
| Pb | ≤0.30 |
| Fe | ≤0.20 |
| P | ≤0.05 |
| Ni | ≤1 |
| Al | ≤0.005 |
| S | ≤0.05 |
| Sb | ≤0.2 |
| Si | ≤0.005 |
Cu minimum may include Ni; Ni includes Co. Cu + named elements ≥99.7%. CDA permits P ≤1.5% for continuous castings; use the contracted casting specification.
C83600
US UNS / CDA reference
| Element | Content (wt.%) |
|---|---|
| Cu | 84–86 |
| Sn | 4–6 |
| Pb | 4–6 |
| Zn | 4–6 |
| Fe | ≤0.30 |
| P | ≤0.05 |
| Ni | ≤1 |
| Al | ≤0.005 |
| S | ≤0.08 |
| Sb | ≤0.25 |
| Si | ≤0.005 |
Cu minimum may include Ni; Ni includes Co. Cu + named elements ≥99.3%. CDA permits P ≤1.5% for continuous castings; use the contracted casting specification.
ZCuSn5Pb5Zn5
GB/T 1176-2013 reference
| Element | Content (wt.%) |
|---|---|
| Cu | balance |
| Sn | 4–6 |
| Pb | 4–6 |
| Zn | 4–6 |
| Fe | ≤0.3 |
| Al | ≤0.01 |
| Sb | ≤0.25 |
| Si | ≤0.01 |
| P | ≤0.05 |
| S | ≤0.10 |
| Ni | ≤2.5 |
Published composition reference. GB and UNS limits are separate specifications; do not substitute without approval.
ZCuSn10P1
GB/T 1176-2013 reference
| Element | Content (wt.%) |
|---|---|
| Cu | balance |
| Sn | 9–11.5 |
| P | 0.8–1.1 |
| Fe | ≤0.1 |
| Al | ≤0.01 |
| Sb | ≤0.05 |
| Si | ≤0.02 |
| S | ≤0.05 |
| Ni | ≤0.10 |
| Zn | ≤0.05 |
| Pb | ≤0.25 |
| Mn | ≤0.05 |
Published composition reference. GB and UNS limits are separate specifications; do not substitute without approval.
ZCuPb10Sn10
GB/T 1176-2013 reference
| Element | Content (wt.%) |
|---|---|
| Cu | balance |
| Sn | 9–11 |
| Pb | 8–11 |
| Fe | ≤0.25 |
| Al | ≤0.01 |
| Sb | ≤0.5 |
| Si | ≤0.01 |
| P | ≤0.05 |
| S | ≤0.10 |
| Ni | ≤2.0 |
| Zn | ≤2.0 |
| Mn | ≤0.2 |
Published composition reference. GB and UNS limits are separate specifications; do not substitute without approval.
ZCuSn10Zn2
GB/T 1176-2013 reference
| Element | Content (wt.%) |
|---|---|
| Cu | balance |
| Sn | 9–11 |
| Zn | 1–3 |
| Fe | ≤0.25 |
| Al | ≤0.01 |
| Sb | ≤0.3 |
| Si | ≤0.01 |
| P | ≤0.05 |
| S | ≤0.10 |
| Ni | ≤2.0 |
| Pb | ≤1.5 |
| Mn | ≤0.2 |
Published composition reference. GB and UNS limits are separate specifications; do not substitute without approval.
CuSn7Zn4Pb7-C / CC493K
EN 1982 producer reference
| Element | Content (wt.%) |
|---|---|
| Cu | 81–85 |
| Sn | 6–8 |
| Pb | 5–8 |
| Zn | 2–5 |
| Ni | ≤2 |
| P | ≤0.10 |
| Al | ≤0.01 |
| Fe | ≤0.2 |
| S | ≤0.10 |
| Sb | ≤0.3 |
| Si | ≤0.01 |
Cu includes Ni. Sn minimum may be 5.2% for continuous/centrifugal castings under the cited reference.
CuSn11P-C / CC481K
EN 1982 producer reference
| Element | Content (wt.%) |
|---|---|
| Cu | 87–89.5 |
| Sn | 10–11.5 |
| P | 0.5–1.0 |
| Al | ≤0.01 |
| Fe | ≤0.10 |
| Mn | ≤0.05 |
| Ni | ≤0.10 |
| Pb | ≤0.25 |
| S | ≤0.05 |
| Sb | ≤0.05 |
| Si | ≤0.01 |
| Zn | ≤0.05 |
Phosphorus limits differ materially from C90700 and ZCuSn10P1.
CuSn10Pb10-C / CC495K
EN 1982 producer reference
| Element | Content (wt.%) |
|---|---|
| Cu | 78–82 |
| Sn | 9–11 |
| Pb | 8–11 |
| Zn | ≤2 |
| P | ≤0.10 |
| Fe | ≤0.25 |
| Ni | ≤2 |
| Sb | ≤0.5 |
| S | ≤0.10 |
| Al | ≤0.01 |
| Mn | ≤0.20 |
| Si | ≤0.01 |
Cu includes Ni; impurity limits differ from C93700.
CuSn5Zn5Pb5-C / CC491K
EN 1982 producer reference
| Element | Content (wt.%) |
|---|---|
| Cu | 83–87 |
| Sn | 4–6 |
| Pb | 4–6 |
| Zn | 4–6 |
| Ni | ≤2 |
| P | ≤0.10 |
| Al | ≤0.01 |
| Fe | ≤0.3 |
| S | ≤0.10 |
| Sb | ≤0.25 |
| Si | ≤0.01 |
Cu includes Ni. A 5-5-5 reference family; not C93200.
CuSn10-C / CC480K
EN 1982 producer reference
| Element | Content (wt.%) |
|---|---|
| Cu | 88–90 |
| Sn | 9–11 |
| Al | ≤0.01 |
| Fe | ≤0.2 |
| Mn | ≤0.1 |
| Ni | ≤2 |
| P | ≤0.2 |
| Pb | ≤1 |
| Si | ≤0.02 |
| Zn | ≤0.5 |
Comparison only, not an equivalent to C90500: Zn ≤0.5% versus 1–3%. Unlisted elements are not assumed to be zero.
Which Information Should I Send for a Custom Bushing?
Send the drawing with bore, outside diameter, length, units, critical tolerances, required alloy and standard, quantity, and operating conditions. Identify every feature requiring ±0.01 mm; this is not a blanket tolerance for all features and sizes.
Can Regional Grades Be Substituted?
Only after the composition, manufacturing route and application requirements have been checked. Similar grade names and nominal compositions do not establish full equivalence. C93200 and 5-5-5 bronze are distinct materials.