ASTM A276 316Ti / UNS S31635 / 1.4571 Stainless Steel Round Bar With Corrosion Resistance And High-Temperature Resistance

Products Specification

ASTM A276 316Ti / UNS S31635 / 1.4571 Stainless Steel Round Bar

With Corrosion Resistance and High-Temperature Resistance**

Product Description

The ASTM A276 316Ti Stainless Steel Round Bar, designated as UNS S31635 and EN 1.4571, is a titanium-stabilized austenitic stainless steel designed for exceptional performance in corrosive and high-temperature environments. Its chemical balance—particularly the addition of titanium—inhibits carbide formation, ensuring long-term resistance to intergranular corrosion even after prolonged heating cycles.

Our 316Ti round bars are produced through hot rolling, forging, or precision machining, supplied in diameters from 10 mm to 350 mm, and available in custom-cut lengths to suit diverse industrial requirements. With outstanding resistance to chlorides, acids, and elevated temperatures, this grade is widely used in chemical plants, marine systems, food processing lines, energy equipment, and high-temperature process zones.

Chemical Composition

316Ti contains chromium, nickel, and molybdenum in controlled proportions, strengthened by titanium to improve stability at elevated temperatures.

Table 1 – Chemical Composition of 316Ti Stainless Steel (%)

Mechanical Properties

316Ti round bars maintain excellent strength and ductility even at sustained temperatures above 600°C, making them suitable for pressure and heat-exposed fabrication.

Table 2 – Mechanical Properties

Industry Standards & Specifications

Our 316Ti stainless steel round bars comply with strict international material standards to ensure compatibility with global manufacturing and engineering projects.

Applicable Standards

• ASTM A276 — Stainless steel bars (hot-rolled, cold-drawn, or forged)

• ASTM A479 — Stainless bars for pressure vessel and boiler use

• ASTM A182 F316Ti — Forged flanges and fittings

• EN 1.4571 — X6CrNiMoTi17-12-2

• ISO 15510 — Chemical composition requirements

• ASME SA276 / SA479 — For high-temperature and pressure applications

Material certificates (EN 10204 3.1 or 3.2) are available upon request.

Equivalent Grades

316Ti is recognized worldwide under different naming systems. The following equivalents help ensure correct material selection and replacement.

Table 3 – Equivalent Grades for 316Ti Round Bar

Key Characteristics & Advantages

316Ti stainless steel offers enhanced performance over standard 316/316L grades, particularly in harsh or high-temperature environments.

1. Superior Corrosion Resistance

• Excellent resistance to chloride-induced pitting and crevice corrosion

• Enhanced resistance in acidic environments (sulfuric, acetic, phosphoric acids)

• Ideal for coastal, marine, and chemically contaminated environments

2. Outstanding High-Temperature Stability

Titanium stabilization prevents chromium carbide formation, making the alloy suitable for:

• Continuous service temperatures up to 600°C

• Long exposure in heat exchangers and superheated piping

• Applications requiring strong resistance to sensitization

3. Excellent Mechanical Strength

• Maintains structural integrity under stress

• Superior creep and stress-rupture resistance compared to 316/316L

• Ideal for pressure-retaining components

4. Reliable Fabrication and Welding Performance

• Good weldability with TIG, MIG, or SMAW processes

• No need for post-weld annealing in most cases

• Good machinability for precision-engineered parts

5. Long Service Life

Its combined corrosion and heat resistance ensures long operational life under demanding service conditions.

Available Dimensions & Processing

Diameter Range:

10 mm – 350 mm

Length Options:

• Standard lengths: 2 m, 3 m, 6 m

• Fully custom cut to customer specifications

Surface Conditions:

• Hot rolled black

• Peeled and turned

• Polished or ground

• Centerless ground for precision tolerances

Processing Services:

• Saw cutting

• CNC machining

• Threading and drilling

• Groove cutting

• Polishing and grinding

• Ultrasonic examination (UT)

Applications of 316Ti Stainless Steel Round Bar

Due to its stability and corrosion resistance, UNS S31635 is chosen for demanding industries where purity, durability, and reliability matter.

Chemical & Petrochemical Sector

• Chemical storage vessels

• Process piping systems

• Acid-handling equipment

• Reactor vessels and distillation units

Marine & Offshore Engineering

• Boat shafts and hardware

• Desalination equipment

• Offshore platform components

• Heat exchangers exposed to seawater

High-Temperature Equipment

• Furnace parts

• Superheaters and heat exchangers

• Exhaust systems

• Thermal processing equipment

Pharmaceutical & Food Industries

• Food contact machinery

• Clean-in-place (CIP) equipment

• Sterilization devices

• Hygienic processing tanks

Mechanical Components

• Pump shafts

• Fasteners

• Valve stems

• Structural supports

Packaging & Transportation

To ensure safe shipment and maintain product integrity, each round bar is professionally packaged with industry-standard materials.

Packaging Options

• Bundled and strapped with strong steel bands

• Ends capped for moisture protection

• Anti-rust oil coating upon request

• Waterproof fabric, woven bags, or plastic wrapping

• Wooden boxes or pallets for export shipments

Transport Methods

• Sea freight (most economical for bulk orders)

• Air shipping for urgent deliveries

• Land transport by truck or rail

• Worldwide logistics support with delivery tracking

Each shipment is clearly labeled with:

• Grade

• Size

• Heat number

• Standard

• Order reference

Quality Inspection

We maintain strict quality assurance procedures to guarantee compliance with international standards.

Testing includes:

• Chemical composition analysis

• Mechanical performance testing

• Dimensional and surface inspection

• Eddy current or ultrasonic NDT

• PMI (Positive Material Identification)

• Third-party inspection (SGS, BV, TÜV) available

FAQ – Frequently Asked Questions

1. What makes 316Ti different from 316 and 316L?

316Ti contains titanium, which stabilizes the alloy at high temperatures and protects against intergranular corrosion.
316L offers low carbon content but cannot match the high-temperature stability of 316Ti.

2. Are 316Ti round bars suitable for welding?

Yes. Titanium prevents carbide precipitation, allowing welded components to retain corrosion resistance without requiring heavy post-weld heat treatment.

3. What surface finishes are available?

We provide hot rolled, peeled, polished, and centerless-ground bars depending on dimensional and aesthetic requirements.

4. Can you provide customized processing services?

Yes. We offer:

• Precision cutting

• CNC machining

• Threading and turning

• Polishing and grinding

• UT and third-party inspection

5. What is the typical lead time for orders?

• In-stock items: 3–7 days

• Customized machining: 10–20 days

• Large volume production: 20–30 days

6. Do you provide samples?

Sample pieces can be provided for technical evaluation, depending on size availability.

7. Where are 316Ti round bars commonly used?

In chemical plants, refineries, marine engineering, food production, pharmaceutical systems, pressure vessels, and heat exchangers.

8. Can you export globally?

Yes. We serve customers across Europe, America, the Middle East, Southeast Asia, and other regions with stable supply chains and professional export documentation.

Why Partner With Us?

• Comprehensive stock of 316Ti round bars from 10–350 mm

• Strict quality management and international certification

• Fast lead times and flexible customization

• Experienced technical team and reliable global logistics

• Competitive pricing with long-term supply capability