MATERIALS & SURFACE FINISHES
A practical guide for engineers and buyers preparing material, heat-treatment and surface-finish requirements for a machining quotation.
A material family can cover different standards, supply conditions and possible equivalents. These differences affect stock availability, machining, heat treatment, inspection and cost. State the grade and governing standard rather than relying on a generic name.
Specific information helps a supplier check the correct stock and process.
Terms such as anodizing, electroless nickel, zinc plating, black oxide or hard chrome are only a starting point. State the standard, treated and masked areas, colour, coating thickness and cosmetic requirements when they matter.
Coating and heat treatment can change dimensions or surface condition. For critical features, define whether tolerance applies before or after treatment, where allowance is needed and how final inspection will be performed. VietTech reviews these points drawing by drawing.
VietTech machines confirmed grades of carbon steel, alloy steel, stainless steel, aluminium, brass, copper and engineering plastics subject to drawing review. Heat and surface treatments are coordinated with suitable partners; standards, hardness, coating thickness and records are agreed per order.
Before issuing an RFQ, check that the 2D drawing, 3D model and purchasing requirements agree.
FAQ
Include the grade, standard and supply condition so similar but non-equivalent grades are not substituted.
Define this according to function. Critical dimensions should identify the final inspection condition and any masking or machining allowance.
No. Heat and surface treatments are coordinated with suitable partners, with technical and documentation requirements confirmed for each order.
MATERIALS & SURFACE FINISHES