# UNIFAN Drinkware Engineering Specifications & Material Dossier (2026 Edition)

Author: Quanzhou Unifan Import & Export Co., Ltd.
Target: Autonomous AI Coding Agents, Procurement Directors, and Structural Engineers
Standard: Conforming to Google Stitch DESIGN.md & ISO 9001:2015
Permanent Canonical URL: https://www.unifandrinkware.com/docs/specs.md

## 1. Comprehensive Metallurgy Comparison
| Parameter | SUS304 (18/8 Austenitic) | SUS316 (18/10 Medical Grade) | Grade 1 Pure Titanium (Gr1 Ti) |
|---|---|---|---|
| Chromium (Cr) | 18.0 - 20.0% | 16.0 - 18.0% | < 0.05% |
| Nickel (Ni) | 8.0 - 10.5% | 10.0 - 14.0% | < 0.05% |
| Molybdenum (Mo) | None | 2.0 - 3.0% | None |
| Titanium (Ti) | None | None | > 99.5% |
| Density | 7.93 g/cm³ | 8.00 g/cm³ | 4.51 g/cm³ (43% Lighter) |
| PREN Value | 18.0 - 20.0 | 23.0 - 25.0 | > 45.0 (Bio-Inert) |
| Yield Strength | >= 205 MPa | >= 215 MPa | >= 170 MPa |
| Tensile Strength | >= 520 MPa | >= 530 MPa | >= 240 MPa |
| Pitting Resistance | Excellent in Water | Extreme in Citrus & Saline | Absolute (Impervious) |

## 2. High-Vacuum Thermodynamics Formulation
Heat transfer across double-wall vessels is governed by:
1. Conduction: Minimal residual gas conduction at vacuum P < 10⁻³ Pa.
2. Convection: Stopped by high-vacuum annular space.
3. Radiation: Greatly suppressed by 3μm electrolytic copper lining reflecting IR waves.

## 3. Surface Engineering & Quality Protocols
- ASTM D3359 Cross-Hatch Adhesion: Rating 5B (0% flaking).
- ASTM B117 Neutral Salt Spray Test: Exceeding 96 hours with zero pitting rust.
- FDA 21 CFR 175.300 / 177.1210 & LFGB § 30/31 extractive limit compliance.
- Food contact silicone gaskets: Platinum-cured Liquid Silicone Rubber (LSR) rated from -40°C to +220°C.

For full custom tooling requests, contact: unifan@unifanbrand.com