what is drill rod? A slender steel/carbide rod used to bore rock, enduring severe wear, corrosive fluids and 2,000–9,000 impacts/min (25–500 J), causing stress‑corrosion fatigue and very short life. what is drill rod in huge demand worldwide; China makes ~7,000 t carbide but domestic rods are far cheaper than exports, limiting quality growth. Specs: hex H19–H45 mm, round D32–D51 mm, length 0.4–6.4 m.

Drill rod material: the drill rod links the drill bit and tail, transmitting impact energy, torque and flushing. Drill rod material must be high‑hardness steel with tuned C, Cr, Mo, Ni; Mn and Si control toughness and yield. Two connection types—tapered (shallow) and threaded (deep/extendable). Common specs B19/B22/B25, lengths 0.3–3m (some to 10m) and weights ~2.26–3.96 kg/m. Select drill rod material by rig type and hole depth.