# Hardbanding Field Notes > Practical knowledge on hardbanding, hardfacing and drill string wear protection Hardbanding Field Notes is an independent editorial site publishing practical, evergreen explainers on oilfield hardbanding and hardfacing. ## Articles - [What Keeps a Welded Steel Engine Stand Safe in Aviation?](https://techenergyhardbanding.com/blog/welded-steel-engine-stand-safety): FAA AC 43.13-1B covers weld repairs to aircraft and component parts only, not engine ground-support stands, so its practices are advisory context rather than stand requirements. Within aircraft repair, the circular calls for cleaning, fitting and jigging parts before welding, removing all defective welds, and never brushing steel with brass or bronze. National Aero Stands rents and leases the AGSE CFM56-7B engine stand (part number AGSE-E207-G01), which has a steel welded frame with tubular support arms and a total weight with engine of 8,837 lbs (4,008 kg). - [Hardbanding Glossary: Every Term Decoded](https://techenergyhardbanding.com/blog/hardbanding-terms-glossary): Hardbanding terminology covers the weld deposit itself, the welding parameters that control its quality, crack types that determine acceptance or rejection, and inspection dimensions. Precise use of these terms prevents disputes in procedures, datasheets, and inspection reports. - [Oilfield Fabrication Basics for Hardband Shops](https://techenergyhardbanding.com/blog/oilfield-fabrication-hardbanding-basics): Hardbanding is a materials-handling and quality-discipline business, not a welding-technology problem. Success requires proper pipe-handling equipment, 100 percent duty cycle machines at working amperage, controlled preheat, five-zone shop flow, and per-joint documentation. - [The Cost of Skipping Hardbanding: Downtime Math](https://techenergyhardbanding.com/blog/cost-of-downtime-hardbanding-roi): Skipping hardbanding saves a known upfront cost but exposes the operator to probability-weighted losses from extra trips, casing wear, and tool joint replacement. A parametric model shows that on most modern spreads, one avoided wear-related trip pays for full-string hardbanding. - [Why Drill Pipe Tool Joints Wear Out](https://techenergyhardbanding.com/blog/drill-pipe-tool-joint-wear-causes): Drill pipe tool joints wear out because they carry the full torque and axial load while rubbing against casing and the borehole wall. Casing friction, abrasive cuttings, dogleg-induced lateral loads, and rotational speed drive the wear that hardbanding is designed to counter. - [Hardbanding QA Checklist: Before the Pipe Leaves](https://techenergyhardbanding.com/blog/hardbanding-qa-checklist): A hardbanding quality assurance checklist verifies five gates before pipe ships: alloy verification, machine setup and parameters, preheat and thermal control, post-weld visual inspection, and documentation. A joint that fails any gate does not ship. - [Hardbanding Inspection and Acceptance Criteria](https://techenergyhardbanding.com/blog/hardbanding-inspection-acceptance-criteria): Hardbanding acceptance criteria cover seven items: deposit height, width, placement, crack condition, spalling, undercut, and hardness verification. Each criterion exists because a specific downhole failure mode has been traced back to it. - [Portable vs Shop Hardbanding Machines](https://techenergyhardbanding.com/blog/portable-vs-shop-hardbanding-machines): Portable orbital hardbanding machines now match shop welding in deposit quality, but shops retain advantages in throughput, repeatability, and inspection documentation. The right choice depends on pipe location, urgency, lot size, and traceability requirements, and many operators use both. - [Re-Applying Hardband Over Existing Deposits](https://techenergyhardbanding.com/blog/reapply-hardband-over-existing): You can re-apply hardband over an existing deposit only when the old band is crack-free, alloy-compatible, and dimensionally sound; otherwise strip to bare base metal. Most shops cap re-application at two to three cycles before cutback. - [Hardbanding Welding Procedure: Preheat to Cool-Down](https://techenergyhardbanding.com/blog/hardbanding-welding-procedure-preheat): Hardband a tool joint by preheating to 400 to 600 °F based on the steel's carbon equivalent, holding interpass temperature in a controlled band, laying symmetric low-dilution beads on the outer third, and cooling slowly in still air or insulation. - [Crack-Free Hardband Alloys: What Actually Works](https://techenergyhardbanding.com/blog/crack-free-hardband-alloys): Not all hardbanding must crack. Nickel-based alloys and qualified complex alloys deposit crack-free when welded with the right procedure, while traditional chromium-carbide iron-based alloys check-crack by design and remain acceptable in benign, abrasive service. - [Non-Magnetic Hardbanding for Directional Drilling](https://techenergyhardbanding.com/blog/non-magnetic-hardbanding-directional-drilling): Non-magnetic hardbanding uses nickel-, cobalt-, or copper-base alloys on BHA components near MWD magnetometers so surveys stay valid. It trades abrasion life for magnetic cleanliness, so standard hardband remains correct for the drill string. - [Tungsten Carbide vs Chromium Carbide Hardbanding](https://techenergyhardbanding.com/blog/tungsten-carbide-vs-chromium-carbide-hardband): Tungsten carbide hardbanding offers the highest abrasion resistance for drill pipe tool joints, while chromium carbide trades some abrasion resistance for better impact toughness, easier welding, and lower casing wear. The right choice depends on well profile, casing exposure risk, and the failure mode you can least afford. - [Casing-Friendly vs Abrasive Hardband Alloys](https://techenergyhardbanding.com/blog/casing-friendly-vs-abrasive-hardband): No hardband alloy protects both casing and tool joint equally. Casing-friendly crack-free nickel or cobalt matrix alloys are the default for directional, high-angle, or high-grade casing wells, while tungsten and chromium carbide deposits suit open-hole abrasive drilling with little casing exposure. - [How Hardband Alloys Resist Abrasion Downhole](https://techenergyhardbanding.com/blog/how-hardband-alloys-work): Hardband alloys resist downhole abrasion through hard carbide particles, usually tungsten or chromium carbide, held in a tough metallic matrix. The carbides resist cutting while the matrix anchors them and absorbs impact, and alloy selection balances abrasion resistance against casing wear and cracking behavior. - [Oilfield Hardbanding: The Complete Field Guide](https://techenergyhardbanding.com/blog/oilfield-hardbanding-ultimate-guide): Hardbanding is a hardfacing process that deposits a wear-resistant alloy onto drill pipe tool joint outer diameters to protect them from abrasive downhole wear. Correct alloy selection, welding procedure, and inspection determine whether the band performs or fails early. ## Reference - Full site content for LLM consumption: https://techenergyhardbanding.com/llms-full.txt - Glossary of terms: https://techenergyhardbanding.com/glossary