Titanium Alloy Bar Execution Standards

 

1. Chinese National Standards (GB/T Series)

GB/T 2965-2023 Titanium and Titanium Alloy Bars

Core Status: The latest national standard for general industrial titanium bars, replacing the 2007 version.

Key Requirements: Specifies dimensional tolerance (e.g., diameter 20–50mm: ±0.2mm), mechanical properties (e.g., TC4 annealed yield strength ≥860MPa), and ultrasonic inspection (GB/T 5193 Class B).

Applicable Grades: TA1, TA2, TA9, TA10, TC4, TC4ELI, etc.

GB/T 39799-2021 Dimensions, Shape, Weight and Allowable Deviations

Focuses on dimensional accuracy, straightness and weight tolerance of titanium bars, supporting precision machining scenarios.

GB/T 42159-2022 Titanium and Titanium Alloy Bars for Fasteners

Special standard for aerospace/automotive fasteners, with stricter fatigue resistance and surface quality requirements.

Other Common GB Standards

GB/T 13810: Titanium bars for medical implants (biocompatibility certified).

GB/T 3620.1: Titanium alloy grade & chemical composition specification.

2. American Standards (ASTM Series, Most Widely Used Globally)

ASTM B348/B348M-25 Standard Specification for Titanium and Titanium Alloy Bars and Billets

Core Status: The most authoritative international standard for titanium bars, recognized by aerospace, medical and industrial fieldsASTM International.

Covered Grades:

Pure Titanium: GR1 (R50250), GR2 (R50400), GR3, GR4ASTM International.

Alloys: GR5 (Ti-6Al-4V, R56400), GR7, GR9, GR23 (ELI)ASTM International.

Key Features: Unified UNS numbering system, clear mechanical property indicators (tensile strength, elongation), and non-destructive testing requirementsASTM International.

ASTM F67/F136 Medical Grade Standards

ASTM F67: Pure titanium bars for medical devices (surgical instruments, implants).

ASTM F136: GR5 (Ti-6Al-4V ELI) for orthopedic implants, with ultra-low interstitial elements (oxygen, nitrogen).

AMS 4928 Aerospace Standard

For high-strength titanium bars in aerospace structures, with strict high-temperature performance and fatigue resistance requirements.

3. International & Other Regional Standards

ISO 7217

International standard for titanium bar technical delivery conditions, consistent with ASTM B348 in core indicators.

Japanese JIS H4650 & German DIN 17862

Common in Asian/European markets, equivalent to ASTM B348 for conventional grades (GR1/GR2/GR5).

4. Standard Selection Guide for Foreign Trade

General Industrial (Chemical/Marine): Choose GB/T 2965-2023 or ASTM B348 GR1/GR2 (cost-effective, corrosion-resistant).

Aerospace/High-Strength: Mandatory ASTM B348 GR5 (Ti-6Al-4V) or AMS 4928 (high strength, fatigue resistance)ASTM International.

Medical Implants: ASTM F136 GR23 or GB/T 13810 (biocompatible, low impurity).

European/Japanese Clients: Accept ISO 7217, JIS H4650 or DIN 17862.

All our titanium alloy bars comply with above standards, providing MTC (Material Test Report), chemical composition certificate and ultrasonic inspection report for export customs clearance and customer verification.