Printed from Kezuriba (kezuriba.net/en/materials/c3604/)
C3604
ISO N (non-ferrous)Copper and copper alloy rods and bars (free-cutting brass; BD = drawn, BE = extruded; formerly Free-Cutting Brass Type 2, old symbol BsBM2). Standard: JIS H 3250 (JIS H 3250:2021).
🌐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 |
|---|---|---|---|---|
| JIS | C3604 | JIS H 3250 | — | |
| ASTM/UNS | C36000Free-Cutting Brass, ASTM B16, etc. | UNS C36000 | close | Agrees in 2+ sources[7][11] |
| EN | CuZn39Pb3 | CW614N | close | One source / reference[11][9][10] |
| GB | HPb60-3HPb58-3 is also close | close | One source / reference[11] |
Differences between the equivalents (from the sources)
- ASTM/UNS C36000: C36000 is Cu 60.0–63.0, Pb 2.5–3.0, Fe ≤0.35, Zn balance (CDA). The lower limit of Cu is higher and the Pb range narrower than C3604. Pb 3.1–3.7 is a separate number, C36010
- EN CuZn39Pb3: Cu 57.0–59.0, Pb 2.5–3.5, Fe ≤0.3, Ni ≤0.3, Sn ≤0.3, Al ≤0.05, etc. (Ningbo Jintian table; Wieland and Diehl give nominal values only). The range lies within C3604 (on the low-Cu side). Wieland matches CW614N to UNS C38500 and C36000 to CW603N (CuZn36Pb3)
- GB HPb60-3: HPb60-3: Cu 58.0–61.0, Pb 2.5–3.5, Fe ≤0.3, Sn ≤0.3. HPb58-3: Cu 57.0–59.0, Pb 2.5–3.5 (Ningbo Jintian table; the table does not say which GB standard the values come from). The range of the often-cited HPb59-3 could not be confirmed in primary sources
⚗Chemical composition (mass %)
As specified in JIS H 3250
⚖Density
—
Not confirmed
JIS H 3250 has no density requirement, and no domestic primary source stating the density of C3604 was found
Reference: Values for alloys with similar composition: C36000 is 8.5 (CDA, Wieland Z23). CuZn39Pb3 (CW614N) is 8.46 (Wieland Z32/Z33) and 8.5 (Diehl)
Calculate weight in C3604 →💪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 |
|---|---|---|---|---|---|
| C3604BD-F (drawn, temper F) | ≥ 335 | Not specified | Not specified | HV 80 min | JIS specified value Agrees in 2+ sources[5][3][6] |
| C3604BE-F (extruded, temper F) | ≥ 335 | Not specified | Not specified | HV 80 min | JIS specified value One source / reference[3] |
| Sanetsu Metal A45 (C3604) 1/2H φ10 | 460 | 330 (0.2% proof stress) | 24 | HV1 140 | Reference value (manufacturer typical value) One source / reference[6] |
| Sanetsu Metal A45 (C3604) O φ20 | 430 | 290 (0.2% proof stress) | 30 | HV1 135 | Reference value (manufacturer typical value) One source / reference[6] |
1 MPa ≈ 145 psi (0.145 ksi). Hardness conversion · unit converter
🔧Machinability notes (as stated in the sources)
- Machinability index from the Japan Copper and Brass Association / Japan Copper Center brochure: leaded brass (C3604) = 100, 60:40 brass 40, naval brass 30, pure copper 20, phosphor bronze 20[12]
- CDA sets the machinability rating of C36000 to 100 (the copper alloy baseline). Wieland uses CW614N as the 100% baseline, and CuZn36Pb3, equivalent to C36000, is 90%. The baseline material differs between sources[7][9][8]
- Lead is added to improve machinability (Sanetsu Metal). The company's machinability index uses C3604 as the baseline, and low-lead material is about half of C3604[13]
- In Daido Steel's drill life test (SKH51 φ5, feed 0.07 mm/rev, 15 mm deep blind hole, dry), the cutting speed for a tool life equivalent to 1000 mm is >300 m/min for C3604 (23 for SUS303 and 14 for SUS304)[14]
📚Sources
Primary sources (public documents from makers, industry associations and standards bodies), numbered where each value is cited. Many are in Japanese.
- webdesk.jsa.or.jp https://webdesk.jsa.or.jp/preview/pre_jis_h_03250_000_000_2021_j_ed10_ch.pdf
- copper-brass.gr.jp https://www.copper-brass.gr.jp/db_access/seibun.htm
- nippon-shindo.co.jp https://www.nippon-shindo.co.jp/pdf/Product%20catalog.pdf
- sandvik.coromant.com https://www.sandvik.coromant.com/en-us/knowledge/materials/workpiece-materials
- gondametal.jp http://gondametal.jp/relays/download/30/91/7/0/?file=/files/libs/132/201807191744585247.pd…
- sanetu.co.jp https://www.sanetu.co.jp/wp-content/themes/twentytwenty-child/brochure/%E3%82%B5%E3%83%B3%…
- alloys.copper.org https://alloys.copper.org/alloy/C36000
- wieland.com https://wieland.com/content/download/9839/file/Z23_EX_EN.pdf
- wieland.com https://wieland.com/en/content/download/9842/file/Z32-Z33_EX_EN.pdf
- diehl.com https://www.diehl.com/cms/files/Diehl_Brass_Solutions_Material_Datasheet_002.pdf
- en.jtcopper.com https://en.jtcopper.com/products/leaded-brass-rod/
- jcda.or.jp https://www.jcda.or.jp/publication/pamphlet/pdf/shindouhin_kaitei_20211130%20(2).pdf
- sanetu.co.jp https://www.sanetu.co.jp/wp-content/themes/twentytwenty-child/brochure/%E3%82%B5%E3%83%B3%…
- daido.co.jp https://www.daido.co.jp/products/stainless/starcut13cr/starcut13cr.pdf
Other materials
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