Titanium Gr 2 Hex Bar

Product Overview

Stop struggling with inconsistent rod dimensions. Our Titanium Gr 2 Hex Bar (UNS R50400) is precision-engineered specifically for the high-volume manufacturing of nuts, bolts, and fittings.

As a dedicated titanium hex bar manufacturer, we understand that for CNC machinists and fastener producers, consistency is king. Unlike standard hot-rolled bars that often require centerless grinding, our Cold Drawn process guarantees ISO 286 h11 tolerances right out of the box. This means you can feed them directly into your Swiss-type CNC lathes or automatic screw machines without worrying about jamming or runout.

Why Engineers Choose Our Gr 2 Hex Bars:

• Ready-to-Machine Accuracy: Strict h11 tolerance (e.g., +0/-0.09mm for 10mm sizes) ensures seamless compatibility with automatic bar feeders.
• Stress-Free Stability: Supplied in the fully Annealed (M) condition to relieve internal stress, ensuring your parts stay straight (Straightness ≤ 0.5mm/m) even after heavy material removal.
• Optimised for Corrosion: We cap Iron (Fe) at 0.20% (33% lower than the ASTM limit) to maximize resistance in saltwater environments, making these bars ideal for marine fasteners.
• Heading Quality: Carefully controlled Oxygen levels balance strength with the ductility needed for cold heading operations without cracking.

Key Technical Specifications

We don’t just meet ASTM B348 standards; we tighten the limits to give you a more reliable material for critical applications.

1. Dimension Availability & Tolerance

2. Chemical Composition (The “Secret Sauce” for Durability)

3. Mechanical Properties (ASTM B348 Gr 2)

Manufacturing Quality & Testing

Quality isn’t just a certificate; it’s a process. We use a triple-check system before any bar leaves our factory:

1. Ultrasonic Testing (UT): 100% inspection per AMS 2631 Class A. We ensure there are no internal voids or inclusions that could cause a bolt head to snap under torque.
2. Surface Integrity: Continuous Eddy Current testing combined with visual checks guarantees a defect-free surface, critical for thread rolling.
3. Traceability: From titanium sponge to the final hex bar, every step is tracked. You will receive a full EN 10204 3.1 Material Test Certificate (MTC) with every shipment.

Applications & Machining Guidelines

Ideal Applications:

• Marine fasteners (DIN 931/933 Bolts, DIN 934 Nuts)
• Chemical processing valve stems & nozzles
• Medical instrument housings (Biocompatible)
• Subsea connectors

Machining Tips: How to Handle Gr 2 Titanium While Titanium Gr 2 is “softer” than Gr 5 (Ti-6Al-4V), it can be “gummy” or sticky. To avoid galling and built-up edge (BUE):

• Keep it Cool: Use high-pressure, high-volume water-soluble coolant. Titanium is a poor heat conductor, so heat concentrates at the cutting edge.
• Don’t Dwell: Maintain a constant feed rate. If the tool dwells, the material work-hardens instantly, destroying your insert.
• Tooling: Use sharp, positive-rake carbide tools (K grade recommended).
• Post-Processing: Since our bars are bright and cold-drawn, you can often leave the hex flats “as-is” for the finished nut/bolt head, saving milling time.

Supply, Packaging & Logistics

We know that a dinged edge on a hex bar means a rejected part. Our packaging ensures your material arrives in pristine condition.

• Scratch-Free Packaging:
  • Small Sizes (< 20mm): Individually sleeved in plastic mesh to prevent metal-on-metal contact.
  • Bulk Shipment: Packed in reinforced plywood cases with moisture-proof barriers and internal dividers.
• Custom Services:
  • Precision Cutting: We can cut to length with a tolerance of ± 1.0mm.
  • Chamfering: We can chamfer both ends (~45°) to save you setup time on your bar feeder.

Frequently Asked Questions (FAQ)

Q: Can I use Titanium Gr 2 Hex Bars for high-stress aerospace bolts?

A: Generally, no. Gr 2 is a “medium strength” material (Yield ≥ 275 MPa). For high-load structural bolts, you likely need Ti-6Al-4V (Grade 5), which we also supply. Gr 2 is best for corrosion resistance and non-structural joining.

Q: What is the difference between h9 and h11 tolerance?

A: h11 is the standard tolerance for cold-drawn bars (e.g., +0/-0.09mm for 10mm) and fits most standard collets. h9 is a tighter precision tolerance for high-end Swiss machining. If you aren’t sure, h11 is usually sufficient for standard fasteners.

Q: Do you require a Minimum Order Quantity (MOQ)?

A: For stock sizes (e.g., SW 10, 13, 17, 19mm), we accept small orders (from 10kg). For custom non-standard sizes, MOQ is typically 100kg.

Q: Is Gr 2 titanium magnetic?

A: No, Commercially Pure (CP) Titanium Gr 2 is non-magnetic, making it ideal for electronic and medical applications where magnetic interference must be avoided.

Ready to Order?

Get a Quote for Titanium Gr 2 Hex Bars Need a specific AF size or h9 tolerance? Contact our engineering team for a custom solution and current stock list.