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High-Precision Brass Bar – Product Supplement

We specialize in producing standard brass grades including C26000 (H59), C27200 (H62), C27000 (H65), C28000 (H68), as well as eco-friendly low-lead and lead-free series (C69300, C6801, etc.). Diameter range: Φ4.0–Φ180 mm, available in straight bars or coils as required.
Manufacturing Process Horizontal continuous casting combined with high-tonnage hot extrusion (extrusion ratio ≥60:1) followed by multiple cold drawing/cold rolling passes and three-stage annealing. This process delivers fine and uniform grain structure, low internal stress, excellent dimensional consistency, and straightness ≤0.3 mm/m, fully meeting the requirements of high-precision machining.

Quality Control

● Raw materials: Primary electrolytic copper and zinc ingots sourced from Tier-1 national suppliers, each batch accompanied by original mill certificates and SGS composition reports
● In-process control: Real-time extrusion temperature monitoring within ±5 °C; metallographic, mechanical property, and eddy-current testing performed on every batch
● Final inspection: 100% laser diameter measurement and straightness verification; third-party test reports available upon request (SGS, BV, TÜV, etc.)
● Dimensional tolerance consistently maintained at h9–h10; h8 or even h7 available for special requirements
● Surface free of scratches, cracks, and oxide scale; surface roughness Ra ≤1.6 μm (in precision-drawn condition)
We focus on supplying industrial key accounts with highly stable, fully traceable brass bars of excellent batch-to-batch consistency. Long-term partners include leading enterprises in automotive components, valves & sanitary ware, water & gas fittings, and electrical & electronic sectors. Factory audits and sample evaluation with complete quality documentation are always welcome.