4130 Capillary Tubing
Procurement of 4130 Capillary Tubing requires exact specification of outside diameter, wall thickness, and material condition. Applicable standards determine the mechanical properties and certification requirements for this chromium-molybdenum alloy.
When 4130 is Appropriate for Capillary Applications
Most instrumentation capillary tubing is stainless steel (for corrosion resistance) or instrument steel with specific bore requirements. 4130 chromoly capillary tube is an uncommon product. If a capillary-range tube is required in 4130, this is likely because: a specific strength requirement at fine bore dimension is needed; or the application is within an existing 4130-alloy assembly and material consistency is required.
Buyers should submit an enquiry with the exact OD, wall, and bore requirements for a feasibility and availability assessment.
Specification for Very Small OD Tube
For small-diameter tube, dimensional tolerances become proportionally larger relative to the tube cross-section. Specifying the exact OD tolerance, wall tolerance, and bore smoothness requirements is essential for very small tube. The applicable standard and inspection requirements should also be explicitly stated.
| Parameter | Consideration for Capillary-Range Tube |
|---|---|
| OD range | Below approximately 0.25" — confirm availability at enquiry |
| Wall | Very thin walls — confirm minimum wall feasibility |
| Tolerance | Must be explicitly specified — tighter than standard may be needed |
| Material | 4130 alloy — confirm application suitability |
| Standard | State applicable standard or tolerance class explicitly |
Frequently Asked Questions
Is stainless steel typically used instead of 4130 for capillary applications?
Yes, in most instrumentation and medical capillary applications, stainless steel (e.g., 316SS) is standard due to its corrosion resistance. 4130 capillary tube would be a specialist requirement.
Enquire About Small-OD 4130 Tube
Provide your exact OD, wall, bore, tolerance, and standard requirements for a feasibility assessment.
- OD (in inches or mm)
- Wall Thickness
- Bore dimension required
- Tolerance class
- Standard or Specification
- Quantity