SUS304 / AISI304 8K Mirror Stainless Steel Sheet Thickness 0.4 - 3.0mm 4ft*8ft for Decoration

SUS304 / AISI304 8K Mirror Stainless Steel Sheet Thickness 0.4 - 3.0mm 4ft*8ft for Decoration

SUS304 / AISI304 8K Mirror Stainless Steel Sheet (0.4–3.0mm, 4ft×8ft) – Premium Decorative Finish for Modern Architecture & Interior Design

Introduction

In the world of architectural metals and decorative materials, SUS304/AISI304 8K mirror stainless steel sheet stands out as a premium choice for designers, architects, and fabricators seeking both aesthetic brilliance and functional durability. With its ultra-smooth, highly reflective surface finish—commonly referred to as “8K”—this stainless steel variant offers a mirror-like appearance that rivals glass while providing superior strength, corrosion resistance, and longevity.

This article explores the key features, technical specifications, applications, advantages, and sourcing considerations of SUS304/AISI304 8K mirror stainless steel sheets in standard dimensions of 4 feet by 8 feet (1220mm × 2440mm) and thicknesses ranging from 0.4mm to 3.0mm, making it ideal for high-end decorative projects worldwide.

What Is SUS304 / AISI304 Stainless Steel?

SUS304 (Japanese Industrial Standard, JIS) and AISI304 (American Iron and Steel Institute) refer to the same grade of austenitic stainless steel—often simply called Grade 304. It is the most widely used stainless steel globally due to its excellent balance of:

• Corrosion resistance (especially against atmospheric and mild chemical exposure)
• Formability and weldability
• Hygienic properties
• Aesthetic versatility

Its composition typically includes:

• Chromium: 18–20%
• Nickel: 8–10.5%
• Carbon: ≤0.08%
• Manganese: ≤2.0%
• Iron: Balance

This alloy structure ensures non-magnetic properties (in annealed condition) and outstanding performance in both indoor and outdoor environments.

Understanding the “8K Mirror” Finish

The term “8K” originates from Japanese surface finish standards and denotes the highest level of polish achievable on stainless steel—comparable to a clear, distortion-free mirror. Unlike brushed or satin finishes, the 8K finish undergoes multiple stages of mechanical polishing followed by buffing with fine abrasives (often down to 0.2–0.5 microns), resulting in:

• Reflectivity >90%
• Zero visible grain lines
• Smooth, glass-like tactile feel
• Enhanced visual depth and luminosity

This finish is often further protected with a transparent PVC film during shipping and installation to prevent scratches.