ZHD Hardware: ISO-Certified Full-Process Quality Control for Cast Iron Table Bases

For B2B buyers in the furniture hardware industry, the stability and durability of Cast Iron Table Bases directly determine the operational cost and brand reputation of downstream commercial catering and household scenarios. As a seasoned furniture hardware manufacturer, ZHD Hardware has built a rigorous full-process quality control system based on 20 years of industry experience and ISO 9001:2015 international standards, ensuring that every batch of Cast Iron Table Bases meets the high standards of global B-end customers. Among them, the first line of defense for quality lies in the strict selection of raw materials.

Raw material selection is the foundation of quality, and ZHD Hardware implements a three-level access standard for cast iron alloy raw materials. All incoming gray cast iron materials (HT200/HT250 grade, in line with GB/T 9439-2010 standard) must go through elemental composition testing (using a direct-reading spectrometer to detect C, Si, Mn, P, S content with an error margin ≤±0.02%) and physical performance testing (tensile strength ≥200MPa, hardness 180-220HB). Only raw materials that pass all tests are allowed to enter the production link, fundamentally eliminating quality hazards such as brittle fracture and poor load-bearing caused by unqualified materials—this is the core guarantee for ZHD Hardware’s Cast Iron Table Bases to achieve a long service life of over 15 years in commercial scenarios.

Dynamic quality control during production is the key to ensuring consistent product quality, and ZHD Hardware has set up 8 key inspection nodes for the core processes of Cast Iron Table Bases production. In the pouring and cooling links, professional inspectors conduct real-time patrol inspections, using 10x magnifying glasses for visual inspection to eliminate surface defects such as cracks (allowance ≤0.2mm) and air holes (diameter ≤1mm, quantity ≤2 per 100cm²). For internal quality, ZHD Hardware adopts magnetic particle inspection (MPI) and ultrasonic scanning (detection depth ≥50mm, defect recognition accuracy ≥99%)—non-destructive testing technologies that can accurately identify hidden internal defects such as shrinkage cavities and inclusions. In the machining stage, a 3-axis coordinate measuring machine (CMM) with an accuracy of ±0.005mm is used to inspect key dimensions: the position tolerance of mounting holes is controlled within ±0.1mm, and the flatness of theCast Iron Table Bases bearing surface is ≤0.05mm/m. Especially for commercial restaurant Cast Iron Table Bases, ZHD Hardware additionally conducts static load-bearing tests (rated load 250kg, continuous loading for 48 hours without permanent deformation) to ensure adaptability to high-frequency use scenarios with multiple people.

Surface treatment is the "protective armor" of Cast Iron Table Bases, and ZHD Hardware’s quality control in this link is equally uncompromising. Before powder coating or painting, the Cast Iron Table Bases surface undergoes two-stage sandblasting (first with 80-mesh corundum, then with 120-mesh corundum) and alkaline degreasing (alkali concentration 50-60g/L, temperature 50-60℃, soaking time 15-20min) to ensure the surface roughness reaches Ra 3.2-6.3μm, which maximizes coating adhesion. After coating, the coating thickness is tested with a digital coating thickness gauge (film thickness 60-80μm, uniformity error ≤±5μm), and the cross-cut tape test (ASTM D3359 standard, adhesion grade ≥4B) and wear resistance test (CS-10 abrasive wheel, 1000 cycles, wear loss ≤5mg) are conducted. These strict tests ensure that ZHD Hardware’s Cast Iron Table Bases can resist rust and coating peeling even in humid catering environments or outdoor semi-outdoor scenarios.

To ensure full-process traceability, ZHD Hardware has established a complete Product Quality Management System (PQMS) that is fully aligned with ISO 9001:2015. Each batch of Cast Iron Table Bases is assigned a unique traceability code, covering detailed data such as raw material batch numbers, production process parameters, and inspection results of each link. Once a quality problem occurs, the crux can be located within 2 hours and solved, completely solving the industry pain point of "difficult after-sales tracking" for B-end buyers. More importantly, ZHD Hardware integrates real-world feedback from global customers into quality control optimization: for example, aiming at the high-collision scenario of commercial restaurant Cast Iron Table Bases, it has optimized the edge chamfering standard (chamfer radius ≥3mm) to reduce collision damage; for household scenarios that focus on appearance, it has upgraded the surface flaw inspection standard (visible surface flaw size ≤0.1mm). This "production-inspection-feedback-improvement" closed loop continuously enhances Cast Iron Table Bases adaptability.

Backed by 20 years of industry experience and a rigorous full-process quality control system, ZHD Hardware’s Cast Iron Table Bases have won trust from 500+ global B-end customers, including chain catering brands, office furniture manufacturers, and hotel project contractors. Whether it is the high-load-bearing requirement of commercial restaurants or the high-appearance demand of household scenarios, ZHD Hardware can provide consistent, reliable quality Cast Iron Table Bases.

If you are looking for a Cast Iron Table Bases supplier with stable quality and full-process traceability, please feel free to contact ZHD Hardware. We provide free product samples, detailed quality inspection reports, and customized solutions for different scenarios (commercial/household, indoor/outdoor). Send your inquiry today, and our professional team will reply within 24 hours!