C27200 Yellow Brass 63%
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Key Engineering Properties
Representative source rows, qualified by their reported conditions. Inspect the tables below for all values, limits, and source notes.
Engineering Summary
UNS C27200 Yellow Brass 63% (62.0-65.0% Cu, Zn Remainder) is a versatile alpha brass with good cold formability and moderate strength, utilized in drawn seamless tubes, heat exchanger shells, pump cylinder liners, and fasteners.
C27200 Yellow Brass 63% Documented Applications
- ›Cold Headed Parts: Conductivity (Thermal)
- ›Cold Headed Parts: Corrosion Resistance
- ›Cold Headed Parts: Forming Characteristics
- ›Fasteners: Fasteners
- ›Fasteners: Forming Characteristics
- ›Fasteners: Mechanical Properties
- ›Heat Exchanger Shells: Corrosion Resistance
- ›Heat Exchanger Shells: Forming Characteristics
- ›Heat Exchanger Shells: Mechanical Properties
- ›Industrial: Cold Headed Parts
- ›Pump Cylinder Liners: Corrosion Resistance
- ›Pump Cylinder Liners: Forming Characteristics
Recognized Aliases
Source-backed commercial trade name and short designations cataloged in canonical data.
C27200 Yellow Brass 63% Specifications & Designations
Standard Designations & Applicable Specifications — Semantically classified designations distinguishing primary standard identifiers, commercial trade names, and applicable specification references.
| System | Identifier | Standard System Name | Classification Notes & Provenance |
|---|---|---|---|
| UNSPRIMARY | C27200 | Unified Numbering System | Unified Numbering System standard designation for copper alloys (CDA / SAE / ASTM)Ref: CDA UNS Standard Designations Register (C27200) |
| CDA | Alloy 272 | Copper Development Association Alloy Number | CDA three-digit legacy designationRef: CDA UNS Standard Designations Register (C27200) |
| Recognized Name / Alias | Classification | Technical Usage & Context |
|---|---|---|
| Yellow Brass 63% | Standard Commercial Name | CDA Standard Commercial Name |
| CuZn37 equivalent | Commercial Alias | Colloquial or commercial industry synonym |
| C27200 | Commercial Alias | Colloquial or commercial industry synonym |
| Standards Body | Specification Code | Specification Title / Scope | Relationship Type |
|---|---|---|---|
| ASTM | ASTM B36/B36M | BRASS PLATE, SHEET, STRIP AND ROLLED BAR | Specification Reference |
| ASTM | ASTM B135/B135M | Seamless Brass Tube | Specification Reference |
| ASTM | ASTM B587 | WELDED BRASS TUBE | Specification Reference |
| ASTM | ASTM B135 | Tube, Seamless | Specification Reference |
| ASME | ASME SB135 | SEAMLESS BRASS TUBE | Specification Reference |
C27200 Yellow Brass 63% Chemical Composition
Chemical Composition (Weight %) — Elemental limits and values from the cited source. Preserves exact semantic limits (minimums, maximums, and ranges).
| Element | Symbol | Atomic No. | Semantic Basis | Specified Value | Unit | Metallurgical Notes & Qualification | Data Status |
|---|---|---|---|---|---|---|---|
| Copper | Cu | 29 | RANGE | 62.00 – 65.00 | wt% | CDA chemical composition specification limits for C27200: 62.0 - 65.0 wt%.Ref: Copper Development Association (CDA) | VERIFIED |
| Lead | Pb | 82 | MAXIMUM | ≤ 0.07 | wt% | CDA chemical composition specification limits for C27200: max 0.07 wt%.Ref: Copper Development Association (CDA) | VERIFIED |
| Zinc | Zn | 30 | BALANCE | Balance | wt% | Remainder element (Zinc).Ref: Copper Development Association (CDA) | VERIFIED |
| Iron | Fe | 26 | MAXIMUM | ≤ 0.07 | wt% | CDA chemical composition specification limits for C27200: max 0.07 wt%.Ref: Copper Development Association (CDA) | VERIFIED |
C27200 Yellow Brass 63% Physical Properties
Source-specific physical properties. Test temperatures are shown only where reported.
| Property Parameter | Canonical SI Value | Semantic Basis | Test Temperature / Context Range | Source Raw Reference | Source Reference | Status |
|---|---|---|---|---|---|---|
| Density | 8.442 g/cm³ | TYPICAL | Test Temp: 20 °CCDA Physical Properties: Density 0.305 lb/cu in. at 68°F (8.442 g/cm³ at 20°C) | 0.305 lb/cu in. at 68°F | Copper Development Association Inc. | VERIFIED |
C27200 Yellow Brass 63% Thermal & Thermodynamic Properties
Phase change temperatures, thermal conductivity, specific heat, mean coefficients of thermal expansion across standardized temperature ranges, and recommended thermal processing windows.
| Property Parameter | Canonical SI Value | Semantic Basis | Test Temperature / Context Range | Source Raw Reference | Source Reference | Status |
|---|---|---|---|---|---|---|
| Liquidus Temperature | 915.6 °C | TYPICAL | CDA Physical Properties: Liquidus temperature 1680.0 °F (915.6 °C) | 1680.0 °F | Copper Development Association Inc. | VERIFIED |
| Thermal Conductivity | 115.96 W/(m·K) | TYPICAL | Test Temp: 20 °CCDA Physical Properties: Thermal conductivity 67.0 Btu/(ft·hr·°F) (115.96 W/(m·K) at 20°C) | 67.0 Btu/ sq ft/ ft hr/ °F at 68°F | Copper Development Association Inc. | VERIFIED |
| Coefficient of Thermal Expansion (CTE) | 20.52 µm/(m·K) | TYPICAL | CDA Physical Properties: CTE 11.4 µin/(in·°F) (20.52 µm/(m·K)) over range 68-57210°F | 11.4 10^-6 per °F | Copper Development Association Inc. | VERIFIED |
| Specific Heat Capacity | 376.8 J/(kg·K) | TYPICAL | Test Temp: 20 °CCDA Physical Properties: Specific heat 0.09 Btu/(lb·°F) (376.8 J/(kg·K)) | 0.09 Btu/ lb /°F at 68°F | Copper Development Association Inc. | VERIFIED |
C27200 Yellow Brass 63% Electrical Properties
Electrical conductivity and resistivity in their reported units and conditions.
| Property Parameter | Canonical SI Value | Semantic Basis | Test Temperature / Context Range | Source Raw Reference | Source Reference | Status |
|---|---|---|---|---|---|---|
| Electrical Conductivity | 27.6 % IACS | TYPICAL | Test Temp: 20 °CCDA Physical Properties: Volume conductivity 27.6 % IACS at 68°F (20°C) | 27.6 % IACS at 68°F | Copper Development Association Inc. | VERIFIED |
C27200 Yellow Brass 63% Mechanical Properties
Contextual Mechanical Properties & Tempers: Engineering strength, ductility, and hardness values grouped by product form, temper, and section thickness. Mechanical properties are contextual and not isotropic averages.
| Product Form | Temper / Condition | Section Size | Tensile (UTS) | Yield Strength | Elongation | Shear Strength | Fatigue Strength | Hardness (Scales Preserved) | Status |
|---|---|---|---|---|---|---|---|---|---|
| Tube | Hard Drawn (H80) · 20 °CSource values and qualifiersTensile Strength: 510.2 MPa (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 379.2 MPa (TYPICAL)Section Size: 0.065; Section Size: 0.065 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 10 % (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — | 0.065 | 510.2 MPa | 379.2 MPa | 10 % | — | — | — | VERIFIED |
| Tube | Hard Drawn (H80)Source values and qualifiersRockwell F Hardness: 80 HRF (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — | 0.065 | — | — | — | — | — | 80 HRF | VERIFIED |
| Tube | Nominal Grain Size 0.025 mm (OS025) · 20 °CSource values and qualifiersTensile Strength: 386.1 MPa (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — Yield Strength (0.5% Ext): 158.6 MPa (TYPICAL)Section Size: 0.065; Section Size: 0.065 in; Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 50 % (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — | 0.065 | 386.1 MPa | 158.6 MPa | 50 % | — | — | — | VERIFIED |
| Tube | Nominal Grain Size 0.025 mm (OS025)Source values and qualifiersRockwell F Hardness: 82 HRF (TYPICAL)Section Size: 0.065; Section Size: 0.065 inCopper Development Association (CDA) — | 0.065 | — | — | — | — | — | 82 HRF | VERIFIED |
Practical Engineering & Fabrication Notes
By Mat Grades Editorial Desk · Updated 2026-11-14. Use alongside the specified product standard and supplier certificate.
Machining & shop-floor behavior
For C27200 Yellow Brass 63%, a qualified cutting-speed or tool-life recommendation is not supplied in the available record. A relevant hardness example is Rockwell F Hardness: 80 HRF (typical; Hard Drawn (H80), H80, Tube, 0.065). Use that supplied condition for a trial of the difficult feature. Record tool changes, burr removal, unclamped dimensions and accepted parts per hour. Relative machinability ratings from different reference scales should not be compared as if they were one common test.
Weldability, brazing & joining
No qualified weld procedure, filler selection or preheat/interpass schedule is established by this material record. Obtain a procedure for the actual joint, supplied condition and section rather than copying one from a nearby grade. The first cataloged strength example is Tensile Strength: 510.2 MPa (typical; Hard Drawn (H80), H80, Tube, 0.065; test temperature 20 °C). Assess the final part after joining or thermal processing. Include distortion, cleanup and inspection in the quotation. A material designation or favorable process rating is a starting point for qualification, not evidence that an untested joint meets the drawing.
Corrosion & service environment
Review the working fluid, cleaning agents and dissimilar-metal contacts as separate exposures. The word copper, brass or bronze is too broad to establish compatibility. A process rating does not qualify a pressure boundary, and a thermal-property measurement does not establish a continuous service-temperature limit. The recorded thermal example is Thermal Conductivity: 115.96 W/(m·K) (typical; ; test temperature 20 °C). State the exposure and inspection access in the design record so that a change of installation or cleaning method triggers a review. The selected composition entries are Cu 62–65 wt%, Pb maximum 0.07 wt%. Chemistry documents identity; it does not establish fluid compatibility.
Selection trade-offs & applications
Use UNS C27200, COMMERCIAL Yellow Brass 63%, CDA Alloy 272 to identify the candidate, then specify the product form and delivered condition separately. The catalog lists Cold Headed Parts: Conductivity (Thermal) as an application example. The related candidate C27000 Yellow Brass 65% is linked for comparison; its approximate equivalent relationship must be checked before substitution. Compare the complete route through machining, joining, finish and inspection. Keep the certificate, required test location and acceptance criteria with the first-article record. A later change of grade, condition or source should be assessed against that same requirement.
Technical references: Copper Development Association (CDA); Copper Development Association (CDA)
C27200 Yellow Brass 63% Equivalent & Comparable Grades
Comparable Grades & Cross-References: Carefully classified cross-reference relationships for C27200 Yellow Brass 63%. Comparable does not mean equivalent.
| Related Material | Family | Relationship Classification | Metallurgical Notes & Differences | Status | Action |
|---|---|---|---|---|---|
| C27000 Yellow Brass 65% | Copper Alloys | Approximate Equivalent | C27200 Yellow Brass 63% and C27000 Yellow Brass 65% have differing Cu/Zn balance and forming response; substitution requires design review.Engineering substitution review required. Design calculations must verify temper, formability, and corrosion limits before specifying as a direct replacement. | VERIFIED | |
| C26800 Yellow Brass 66% | Copper Alloys | Approximate Equivalent | C27200 has higher zinc content than C26800; not directly interchangeable without engineering review of deep drawing vs bending limits.Engineering substitution review required. Design calculations must verify temper, formability, and corrosion limits before specifying as a direct replacement. | VERIFIED |
Yellow Brass Alloy Family
Copper alloys sharing common alloying formulations and metallurgical classifications under the Yellow Brass branch.
Sources
Sources & Provenance Trail: Authoritative reference publications, standards specifications, and data registers cited across this material record.
Copper Development Association authoritative technical reference profile for C27200 Yellow Brass 63%.
Unified Numbering System (UNS) designation registration register confirming active C27200 status.