Sub-Critical Stress-Relief Annealing (280°C to 300°C) for Brass Bodies
Engineering Overview: Metallurgical guide on thermal stress-relief annealing (280°C) for extruded brass cylinder bodies to eliminate residual stresses and seasonal cracking.
Technical & Engineering Specifications
| Standard | ASTM B154 Ammonia Vapor Verification |
|---|---|
| Soak Time | 120 Minutes Slow Air Cool |
| Temperature | 280°C - 300°C Controlled Atmosphere Furnace |
| Thermal Process | Sub-Critical Stress-Relief Annealing |
Preventing Stress Corrosion Cracking (SCC)
Heavy cold extrusion and high-speed CNC milling induce residual tensile stresses in brass lock cylinder bodies.
Annealing Protocol
- Furnace Cycle: Heated to $280^\circ\text{C}$ to $300^\circ\text{C}$ for 2 hours, relieving 90% of internal stresses without reducing hardness.
Frequently Asked Engineering & Selection Questions
Q1: What are the primary material characteristics of this finish?
Metallurgical guide on thermal stress-relief annealing (280°C) for extruded brass cylinder bodies to eliminate residual stresses and seasonal cracking.