Here’s a professional English summary of the brass materials (H59, H62, C3600, CW614) with technical specifications:
Material Classification & Composition Grade Int’l Equivalent Type Composition (wt.%) Key Characteristic H59 C28000 (ASTM) Common Brass Cu 57-60, Bal. Zn Low Cu/Zn ratio (~60:40) H62 C27400 (ASTM) High-Strength Brass Cu 60.5-63.5, Bal. Zn Standard brass ratio C3600 C36000 (ASTM) Leaded Brass Cu 60-63, Pb 1.8-3.7, Bal. Zn Free-cutting grade CW614 CW614N (EN) Forging Brass Cu 57-60, Pb 0.5-2.0, Bal. Zn Hot-forging optimized
Mechanical Properties Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness (HV) Conductivity (%IACS) H59 300-400 150-250 15-25 80-120 28-32 H62 340-440 180-300 20-30 90-130 26-30 C3600 340-380 170-220 25-35 75-100 24-28 CW614 350-450 200-280 18-28 85-115 25-29
Physical Properties Density : 8.4-8.7 g/cm³ (all grades)Melting Range : 900-940°C (lower with higher Zn)Thermal Conductivity : 110-130 W/(m·K) (~30% of pure Cu)Processing Characteristics Property H59 H62 C3600 CW614 Cold Work Moderate Good Poor (brittle) Good Hot Work Preheating req. Excellent (750-850°C) Not recommended Excellent (700-800°C) Machinability (vs C3600=100%)60% 70% 100% 85% Weldability Poor (Zn fumes) Moderate (shielding req.) Very poor Moderate
Corrosion Resistance General : Good in freshwater/atmosphere, but inferior to pure copperDezincification Resistance : H59 > H62 > C3600/CW614 (higher Zn = worse)Stress Corrosion Cracking : Leaded grades (C3600/CW614) more susceptibleTypical Applications Grade Primary Applications H59 Low-cost hardware (locks, hinges), decorative items H62 Springs, radiators, electrical connectors, musical instruments C3600 Precision-turned parts (valves, clock gears), plumbing fittings (non-potable water) CW614 Hot-forged components (pipe valves, marine fittings)
Key Comparisons Aspect H59 H62 C3600 CW614 Advantage Low cost Balanced properties Best machinability Superior forgeability Limitation Poor corrosion resist. Stringy chips Lead contamination risk Higher cost Zn Equivalent 40% 37% 36% 39%
Material Selection Guide Cost-sensitive applications : H59General-purpose use : H62 (most versatile)High-volume machining : C3600 (note lead restrictions)Complex forged parts : CW614Note : C3600 is restricted for potable water contact (use lead-free alternatives like C3771/C4640). All brasses are susceptible to stress corrosion cracking in ammonia environments.
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