D28 Modular Welding Fixture Table with Nitrided Cast Iron Table Top

Our D28 Modular Welding Fixture Table with Nitrided Cast Iron Table Top is a heavy-duty 5-sided 3D flexible welding platform engineered for high-precision metal fabrication, robotic welding stations and heavy-load structural assembly. Constructed from integrally cast HT300 grey cast iron with full gas nitriding heat treatment across the entire tabletop, side walls and inner locating holes, this modular welding table delivers superior wear resistance, high-temperature spatter resistance and long-term anti-rust performance that ordinary shot-blast steel welding tables and untreated cast iron fixture tables cannot match.

Adopting global standard D28 Φ28 hole system with 100mm uniform grid spacing, all matching modular welding fixtures, locating pins and clamping accessories are fully interchangeable, allowing fast three-dimensional workpiece positioning without custom single-purpose jigs. Dual stress relief casting eliminates thermal deformation under continuous welding heat and heavy component pressure, maintaining stable flatness and consistent clamping accuracy for years of workshop production, ideal for construction machinery frames, new energy vehicle chassis, rail transit steelwork and marine engineering welding projects.

Nitriding is a premium heat treatment for cast iron tabletops that provides superior corrosion and wear resistance—the key feature distinguishing this 3D modular welding table from standard shot-blasted or black-oxide finished tables.

Process Principle: Nitrogen atoms diffuse into the cast iron surface at high temperatures, creating a dense, hardened nitride layer that eliminates the risk of surface flaking or peeling.

• Surface Hardness: Increases from HB200 to HV400+, enhancing wear resistance more than fourfold
• High-Temperature Resistance: Withstands localized welding arc spatter (800-1500°C) without softening or surface ablation
• Rust and Corrosion Resistance: Dense nitride layer blocks moisture and prevents corrosion from weld spatter
• Anti-Adhesion: Cooled weld spatter is easily removed and does not readily stick to the surface

• Standard Shot-Blasted / Black-Oxide Steel Tables: Prone to rust, weld spatter adhesion, and rapid wear; hole precision degrades within 1-2 years
• Standard Non-Nitrided Cast Iron Tables: Poor wear and rust resistance; requires frequent maintenance
• Nitrided Cast Iron Tables: Low maintenance, sustained high precision, and double the service life

System Certifications: ISO 9001 production control, CE machinery safety certification, ISO 3834 welding standards; compliance with DIN 876 industrial flatness specifications

Documentation Included with Shipment: Cast iron material analysis report, nitriding hardness test report, flatness and hole-spacing accuracy inspection sheet, pre-shipment visual/flaw detection record, and packing list

Optional Third-Party Testing: SGS material analysis, salt spray corrosion resistance testing, and third-party on-site supervision/video inspection; meets factory audit requirements of major European and American clients

Compared to imported Siegmund tables: Features the same nitriding process and adheres to the same global D28 standards, delivering equivalent precision at just one-third of the price; accessories are fully interchangeable, and after-sales support is faster.

Compared to low-cost, non-nitrided cast iron tables: Standard tables lack a nitrided layer, leading to rust, wear, and enlarged holes within 1-2 years; this product features a permanently wear-resistant nitrided layer with no significant loss of precision over three years, resulting in a lower total cost of ownership.

Compared to welded steel welding tables: Cast iron offers superior vibration damping, ensuring the workpiece does not shift during welding; in contrast, steel plates are prone to thermal deformation, causing flatness to deteriorate rapidly during prolonged high-temperature welding.

Warranty Period: 1-year warranty on the tabletop unit and cast housing; 1-year warranty on the complete nitrided fixture set (free replacement parts provided for non-man-made quality issues).

Technical Support: 2-hour online response time; fixture configuration proposals provided within 24 hours; provision of 3D fixture assembly diagrams and welding workstation layout guidance.

Value-Added Services: On-site precision calibration, custom fixture design for production lines, and comprehensive solutions for robotic welding workstations.