C69400 Silicon Red Brass Pipe is a high strength copper alloy that is a combination of copper, zinc & silicon with use in demanding mechanical & industrial applications. It has a copper content of 80.0 to 83.0% and silicon content of 3.5 to 4.5%, having good strength, wear resistance and atmospheric corrosion resistance. The properties allow it to be used in parts for valves, pump shafts, heavy duty bushings, and in fluid handling equipment that is machined. ASTM B371/B371M covers C69400 rod. Pipe and Hollow are supplied to agreed mill or customer specification. C69400 is an industrial, non-potable service lead that may contain up to 0.30% lead. USA Piping Solution offers you C69400 pipe and hollow bar in your sizes. Please supply the OD, bore and length to get a quote.
Specifications of C69400 Silicon Red Brass Pipe
| Specification Parameter | Technical Detail & Standard Specification |
|---|---|
| Product Name | C69400 Silicon Red Brass Pipe / Hollow Bar / Heavy-Wall Tube |
| UNS / CDA Designation | UNS C69400 / Silicon Red Brass |
| Governing Standards Position | Primary alloy spec: ASTM B371 / B371M (Rod); Pipe/Hollow stock supplied to Mill / Customer Specification(Note: C69400 is not listed in ASTM B135 or ASTM B43) |
| European / Foreign Equivalents | No EN equivalent listed in the sources checked; confirm on the mill certificate |
| Outer Diameter (OD) | Pipe / Seamless Tube: 6.0 mm to 219.0 mm (0.236in to 8.622in) | Solid Rod: 3/8 in to 2 in |
| Wall Thickness | Pipe / Tube: 0.80 mm to 20.0 mm (0.031in to 0.787in) |
| Hollow Bar Sizes | Bore 20 mm min to OD 100 mm max |
| Available Lengths | 1 m to 6 m, or standard bar length 144 in (3658mm); custom cut lengths |
| Length Types | Single Random, Double Random, Standard Fixed & Precision Cut Lengths |
| Manufacturing Type | Seamless (Drawn, Extruded, or Trepanned) |
| Available Profiles / Forms | Round Hollow Bar, Heavy-Wall Pipe, Custom Machined Profiles |
| Standard Tempers | Hard: H04 | Hot Worked: As-Extruded, As-Forged |
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Applications and Industrial Uses of C69400 Silicon Red Brass Pipe
- Industrial Valve Stems
- Pump Shafts and Pump Components
- Heavy-Duty Bushings and Bearings
- Machined Pipe Fittings
- Fluid-Handling Equipment Components
- Hydraulic and Pneumatic Equipment Parts
- Heavy Machinery Components
Frequently Asked Questions
What is a C69400 silicon red brass pipe?
C69400 silicon red brass pipe (or hollow bar) is a high-strength wrought copper-zinc-silicon alloy (UNS C69400) containing 80.0 to 83.0% copper and 3.5 to 4.5% silicon. It provides high tensile strength, wear resistance, and good corrosion performance.
Is C69400 the same as C23000 red brass?
No. C23000 is a binary 85/15 copper-zinc alloy covered by ASTM B43 for standard red brass pipe. C69400 contains 3.5 to 4.5% silicon, providing significantly higher tensile strength and hardness than standard C23000.
Is C69400 lead free?
No. C69400 permits up to 0.30% lead (Pb). Because this exceeds the 0.25% maximum limit established for potable water in North America, C69400 is not classified as lead-free and is intended for industrial (non-potable) service.
Which standard covers C69400?
The core specification naming C69400 is ASTM B371 / B371M for copper-zinc-silicon alloy rod. C69400 pipe and hollow stock are supplied to mill or customer specifications aligned with ASTM B371 chemical and mechanical parameters.
How does C69400 differ from C69300?
C69400 is a leaded silicon red brass (Pb up to 0.30%) with 80 to 83% Cu. C69300 (Eco Brass) is a lead-free alloy (Pb 0.09% max) with 73 to 77% Cu and added phosphorus for dezincification resistance.
How machinable is C69400?
C69400 has a machinability rating of 30% compared to Free-Cutting Brass (C36000 = 100%). Its controlled lead content assists chip breaking during turning and threading operations.
Material documentation and third-party inspection options available according to project requirements.
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