GB/T 35368-2017 in English

VALID

Ti75 titanium alloy bars for submersible

Issued on:2017-12-29
Implemented on:2018-07-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $160.00
$156.00

Standard No:	GB/T 35368-2017
Document status:	VALID
Superseded by:	GB/T 35368-2026 Titanium and titanium alloy bars for submersible
Superseded on:	2027-02-01
Title in English:	Ti75 titanium alloy bars for submersible
Title in Chinese:	潜水器用Ti75合金棒材
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2017-12-29
Implemented on:	2018-07-01
ICS Classification:	77.150-Products of non-ferrous metals
Chinese Classification:	H64-Rare light metals and their alloys
Professional Classification:	GB-National Standard
Related Keywords:	ti75 titanium alloy bars ti75 alloy bars technology evolution ti75 titanium alloy submersible introduction gb/t ensure alloy uniformity
Related Topics:	submersible Alloy bar GBT35368 GB/T 35368-2017

《GB/T 35368-2017潜水器用Ti75合金棒材》由TC306（全国潜水器标准化技术委员会）归口，主管部门为国家标准化管理委员会。

Introduction

GB/T 35368—2017 Standard Overview

This standard specifies in detail the classification, requirements, test methods and quality assurance measures of Ti75 alloy bars for submersible frames and other structural parts, and is applicable to the manufacturing of high-end equipment such as deep-sea submersibles and manned cabins.

Standard Development Background and Technology Evolution

Ti75 titanium alloy is widely used in the field of submersibles due to its excellent strength-density ratio and corrosion resistance. This standard is based on the vacuum consumable arc furnace melting process and combined with modern material testing technology to ensure product performance stability and consistency.

Project	Requirements	Technical basis	Scope of application
Chemical composition control	Ti: balance, Mo: 2.5~3.5%, Zr: 1.0~2.5%	GB/T 3620.2	Ensure alloy uniformity and stability
Mechanical properties	Rm≥700MPa, A%≥13%	GB/T 228.1	Meet the needs of deep-sea high-pressure environment
Dimensional accuracy requirements	±0.4mm~±2.0mm (divided by diameter)	GB/T 4698	Adapt to precision machining needs

Implementation suggestions and practical applications

Case study: Manufacturing of a deep-sea submersible frame

In a 4500-meter deep-sea detector project, Ti75 alloy bars were selected as the main structural material. By strictly implementing GB/T 35368-2017 standard:

Chemical composition uniformity improved by 30%
Mechanical properties compliance rate increased to 98%
Dimensional deviation controlled within ±0.5mm

Comparative analysis of standard frameworks

Compared with similar international standards (such as ASTM B381), GB/T 35368-2017 has advantages in the following aspects:

Stricter chemical composition control requirements
Complete ultrasonic flaw detection inspection standards
Special performance test specifications for deep-sea environments

Quality assurance and supply chain management

The following measures are recommended in the supply chain:

Establish a raw material supplier qualification certification mechanism
Implement a full-process traceability system
Regularly conduct standard compliance reviews

Summary and Outlook

As the core material of deep-sea equipment, the quality of Ti75 titanium alloy bars is directly related to the safety and reliability of submersibles. By strictly following the GB/T 35368-2017 standard and continuously optimizing process parameters in combination with practical applications, it will provide strong technical support for my country's deep-sea exploration.

More samples: JJG 21-2008 DL/T 5154-2012 JC/T 2453-2018

Sample only — not a preview of GB/T 35368-2017