JIS H 3300 Standard Specification for Copper and Copper Alloy Seamless Pipes and Tubes

 1. Scope  

JIS H 3300 applies to seamless pipes and tubes made of copper and copper alloys, primarily used for plumbing, heat exchangers, and general engineering applications.

 2. Ordering Information  

When ordering, the following details must be specified:  

- Standard designation (JIS H 3300)  

- Material code (e.g., C1220, C6870)  

- Dimensions (outer diameter, wall thickness, length)  

- Temper designation (e.g., soft, hard, half-hard)  

- Quantity  

- Special requirements (e.g., surface finish, end treatment)  

 3. Material Codes and Alloys  

Common material codes include:  

- C1020 (Oxygen-free copper)  

- C1220 (Phosphorus-deoxidized copper)  

- C2801 (Brass: 60% Cu, 40% Zn)  

- C4430, C6870 (Aluminum brass, Arsenic-added brass)  

- C7060, C7150 (Copper-nickel alloys)  

Each material has specified chemical composition limits per JIS H 3300.

 4. Manufacturing Process  

- Pipes/tubes are produced by extrusion, cold drawing, or rolling.  

- Heat treatment (annealing) may be applied to achieve desired temper.  

 5. Dimensions and Tolerances  

- Standard outer diameters, wall thicknesses, and lengths are specified.  

- Tolerances for dimensions (OD, WT, straightness, etc.) are defined based on material and temper.  

 6. Mechanical Properties  

- Tensile strength, elongation, and hardness requirements vary by material and temper.  

- Example:  

  - C1220 (Soft) – Tensile strength ≥ 200 MPa, Elongation ≥ 40%  

  - C2801 (Hard) – Tensile strength ≥ 370 MPa, Elongation ≥ 15%  

 7. Inspection Requirements  

- Chemical analysis (to verify composition).  

- Mechanical tests (tensile, hardness).  

- Hydrostatic or nondestructive testing (e.g., eddy current) for leak tightness.  

- Visual inspection (surface defects, scratches, dents).  

- Dimensional checks (OD, WT, length).  

 8. Surface Condition  

- Surfaces must be clean, free from cracks, and excessive imperfections.  

- Minor scratches or discoloration may be allowed within limits.  

 9. Marking and Packaging  

- Each pipe/tube must be marked with:  

  - Manufacturer’s name or trademark.  

  - Material code.  

  - Dimensions.  

  - Heat number/batch identification.  

- Packaging must prevent damage during transit.  

 Material Codes in JIS H 3300  

 1. Pure Copper (Copper ≥ 99.90%)  

- C1020 (Oxygen-free copper)  

- C1100 (Electrolytic tough pitch copper, Cu ≥ 99.90%)  

- C1220 (Phosphorus-deoxidized copper, Cu + Ag ≥ 99.90%)  

 2. Brass (Copper-Zinc Alloys)  

- C2100 (95% Copper Brass, Cu 84–86%, remainder Zn)  

- C2200 (90% Copper Brass, Cu 88–91%, remainder Zn)  

- C2300 (85% Copper Brass, Cu 84–86%, remainder Zn)  

- C2400 (80% Copper Brass, Cu 78.5–81.5%, remainder Zn)  

- C2600 (70% Copper Brass, Cu 68.5–71.5%, remainder Zn)  

- C2680 (Yellow Brass, Cu 64–68%, remainder Zn)  

- C2700 (65% Copper Brass, Cu 63–68.5%, remainder Zn)  

- C2720 (Common Brass, Cu 62–64%, remainder Zn)  

- C2801 (60% Copper Brass, Cu 58–61%, remainder Zn)  

 3. Leaded Brass (Free-Cutting Brass)  

- C3140 (Leaded Brass, Cu 87–90%, Pb 1.3–2.5%, remainder Zn)  

- C3501 (Leaded Brass, Cu 60–63%, Pb 1.3–2.5%, remainder Zn)  

- C3604 (Free-Cutting Brass, Cu 57–61%, Pb 1.8–3.7%, remainder Zn)  

 4. Tin Brass & Special Brass  

- C4430 (Admiralty Brass, Cu 70–73%, Sn 0.8–1.2%, Zn + As remainder)  

- C4621 (Naval Brass, Cu 60–63%, Sn 0.5–1.0%, Pb ≤ 0.2%, remainder Zn)  

- C6870 (Aluminum Brass, Cu 76–79%, Al 1.8–2.5%, As 0.02–0.06%, remainder Zn)  

 5. Copper-Nickel Alloys  

- C7060 (90-10 Cu-Ni, Cu 86.5–90.5%, Ni 9–11%, Fe 1–1.8%, Mn ≤ 1.0%)  

- C7150 (70-30 Cu-Ni, Cu 63–70%, Ni 29–33%, Fe 0.4–1.0%, Mn ≤ 1.0%)  

 6. Other Copper Alloys  

- C5111 (Phosphor Bronze, Cu + Sn 99.5%, P 0.03–0.35%)  

- C5191 (Phosphor Bronze, Cu 93.5–95.5%, Sn 6–7%, P 0.1–0.25%)  

- C7060, C7150 (Copper-Nickel, as above)  

 Key Notes:  

- The exact chemical composition limits are specified in JIS H 3300.  

- Some alloys may have additional restrictions on impurities (e.g., Pb, Fe, Ni).  

- Temper designations (e.g., soft, hard, half-hard) affect mechanical properties.  

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