IS / BIS / EN Certified

IS 4923 YST 240 / 310 / 355 Pipes Manufacturer in India

Building strong bridges, buildings, and industrial frames requires reliable steel pipes that can handle heavy loads safely. As a leading IS 4923 YST 240 Pipes Manufacturer in India, we supply top-quality carbon steel piping designed for maximum strength, stability, and long-lasting performance.

Our factory produces high-grade IS 4923 YST 240 Pipes, IS 4923 YST 310 Pipes, and IS 4923 YST 355 Pipes available in round, square, and rectangular shapes to fit various construction designs. We also supply precision-made IS 4923 YST 240 Tubes and higher grades for scaffolding, support pillars, and general engineering work.

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Round / Square / RectangularProfiles Available

YST 240 / 310 / 355Available Grades

1/2″ NB to 36″ NBSize Range

Certified IS 4923 YST 240, YST 310, and YST 355 carbon steel pipes and structural hollow sections stocked at the factory

Overview

What are IS 4923 YST 240 / 310 / 355 Carbon Steel Pipes?

IS 4923 carbon steel pipes are specialized structural hollow sections manufactured for load-bearing and construction applications. The designation "YST" stands for Yield Stress Steel, where the accompanying numbers (240, 310, and 355) represent the minimum yield strength of the material measured in megapascals (MPa).

These pipes offer an exceptional strength-to-weight ratio, high resistance to torsional stress, and uniform cross-sectional dimensions. Whether produced as seamless or ERW profiles, IS 4923 YST 310 Tubes and IS 4923 YST 355 Pipes provide structural stability while remaining easy to weld, cut, and fabricate on project sites.

While IS 4923 is specified primarily for square and rectangular structural hollow sections, many civil and structural projects also require circular tubular profiles. For round structural piping engineered to similar load-bearing standards, explore our range of IS 1161 YST 210 / 240 / 355 Carbon Steel Pipes suitable for scaffolding, piling, and structural columns.

Grade Comparison: YST 240 vs. YST 310 vs. YST 355

Choosing the right grade depends on the weight load, span distance, and structural stress required for your project. Here is a brief snapshot to help you select the ideal grade:

Feature / Metric	YST 240	YST 310	YST 355
Primary Strength Level	Standard Strength	Medium-High Strength	Maximum High-Tensile
Min. Yield Strength	240 MPa	310 MPa	355 MPa
Best Suited For	Light trusses, scaffolding & general framing	Industrial warehouse roofs, columns & equipment frames	Heavy bridges, high-rises, crane booms & heavy loads
Formability & Bending	Highest flexibility & easiest to shape	Balanced strength & formability	Rigid & high load resistance

Need a deeper breakdown? For complete load-calculation formulas, deflection charts, and engineering selection criteria, check out our comprehensive technical guide on choosing structural pipe grades.

Key Characteristics & Performance Benefits of IS 4923 Pipes

Choosing certified IS 4923 steel piping gives your structural framework superior physical durability under heavy static and dynamic loads. These pipes feature low carbon content, ensuring clean field welds without causing material cracking or structural weakness. In addition, their smooth surface finish makes them highly receptive to hot-dip galvanization and protective anti-corrosion coatings. Working with an IS 4923 YST 355 Pipes Manufacturer in India allows engineering teams to optimize frame designs, reduce structural dead-weight, and maintain strict building safety margins.

IS 4923 Carbon Steel Pipes Pricing

By manufacturing in large volumes, we keep production costs down and pass direct savings on to you at competitive factory rates. Here is a helpful price guide for our structural carbon steel pipes:

Material Grade & Pipe Profile	Indicative Market Price (INR)	Sizing Covered
IS 4923 YST 240 Pipes (Seamless / ERW)	₹75 to ₹85 / Kg	1/2" to 24" Outer Diameter
IS 4923 YST 310 Pipes (Structural Profile)	₹80 to ₹95 / Kg	25mm to 500mm Profiles
IS 4923 YST 355 Pipes (Heavy Wall)	₹82 to ₹105 / Kg	Custom Thickness / Schedules

Note: These rates serve as an industry baseline. Final prices depend on raw material market fluctuations, required wall thickness, and total order volume.

Specifications of IS 4923 Carbon Steel Pipes

Buying directly from an established IS 4923 YST 310 Pipes Manufacturer in India ensures accurate sizing and material compliance. Whether you need standard IS 4923 YST 310 Tubes or high-tensile piping, our technical range covers all standard dimensional parameters:

Feature	Available Options
Standard Grade	IS 4923 (Structural Steel Pipes)
Pipe Sizes	1/2″ NB to 36″ NB (Custom sizes up to 60″)
Shapes Available	Round, Square, and Rectangular Profiles
Thickness Range	3.0 mm to 12.0 mm (Light, Medium, Heavy)
Manufacturing Method	Seamless, ERW (Welded), or Fabricated
Pipe Lengths	3 to 18 Meters, or custom cut lengths
Pipe Ends	Plain End, Beveled End, or Threaded

Chemical Composition of IS 4923 Carbon Steel Pipes

The element balance in IS 4923 YST 355 Tubes is carefully controlled so the steel stays strong while remaining easy to weld and shape on construction sites:

Element	Maximum Percentage Allowed
Carbon (C)	0.20% Max (Keeps steel easy to weld)
Manganese (Mn)	1.30% Max (Adds toughness)
Phosphorus (P)	0.050% Max (Prevents brittleness)
Sulphur (S)	0.050% Max (Ensures smooth finish)
Silicon (Si)	Trace amounts

Mechanical Strength of IS 4923 Pipe Grades

To help you choose the right material, here is a simplified breakdown of how much pressure and load these pipes can handle before bending or breaking:

Property / Feature	YST 240	YST 310	YST 355
Load Level	Standard Strength	Medium Strength	High Strength
Yield Strength	Medium loads (240 MPa min)	Heavier loads (310 MPa min)	Heavy-duty loads (355 MPa min)
Tensile Strength	Good tension (410 MPa min)	High tension (450 MPa min)	Max strength (490 - 510 MPa)
Elongation	Flexible & easy to shape (10%–15%)	Balanced strength & flex (8%–10%)	High-stress durable (10%–14%)

What is the difference between Yield Strength and Tensile Strength?

Yield strength is the point where a pipe starts to bend under heavy weight. Tensile strength is the maximum force or stretching pressure a pipe can handle before it completely breaks apart. All our structural line products undergo strict pressure and load testing before final delivery.

Parameter	Allowed Variation
Outer Diameter	± 1%
Wall Thickness	± 10%
Corner Angles	90 Deg (± 2 Deg)
Single Pipe Weight	+10% to -8%
Bulk Weight (10+ MT Lot)	± 7.5%

Equivalent Designations for IS 4923 Steel Pipes

Our structural pipe inventory seamlessly aligns with major international steel specifications:

Region / Standard	Equivalent Steel Grade
Europe (EN)	EN 10219 / EN 10210 S235JRH / S355J2
United Kingdom (BS)	BS 4360 Grade 40A / 43C / 50D
Germany (DIN)	DIN 2440 / DIN 2441 (St 37-2 / St 52-3)
International (ISO)	ISO 65

Applications

Practical Applications of IS 4923 Steel Pipes

These structural hollow profiles distribute weight evenly, making them ideal for heavy load-bearing environments. They are widely implemented across several core sectors.

APP / 01

Infrastructure & High-Rise Buildings

Used for structural columns, support pillars, space frames, and roof trusses in airport terminals, industrial warehouses, and pre-engineered buildings (PEBs).

APP / 02

Bridges & Civil Support Systems

Essential for constructing footover bridges, highway sign gantries, public transit shelters, and heavy-duty scaffolding frameworks.

APP / 03

Pre-Engineered Storage & Racking

Ideal for constructing multi-tier warehouse storage racks, industrial shelving, and mezzanine floor supports.

APP / 04

Architectural & Urban Elements

Preferred for aesthetic exterior facades, decorative structural railings, handrails, staircases, and fence posts.

APP / 05

Machinery & Equipment

Used to construct heavy vehicle frames, crane booms, conveyor belts, and agricultural machine mounts.

APP / 06

Civil Engineering

Ideal for highway sign supports, footover bridges, public transit shelters, and scaffolding frameworks.

Choosing certified IS 4923 steel piping gives your structural framework superior physical durability under heavy static and dynamic loads. These pipes feature low carbon content, ensuring clean field welds without causing material cracking or structural weakness. Working with an IS 4923 YST 355 Pipes Manufacturer in India allows engineering teams to optimize frame designs, reduce structural dead-weight, and maintain strict building safety margins.

Quality Assurance

Quality Testing Protocols & Certified Credentials

To ensure complete reliability on site, our steel products undergo rigorous quality checks prior to dispatch.

Proven Market Authority & Official Government Certifications

CREDENTIALS

Certificate / Test Type	Purpose & Safety Utility
ISO 9001:2015 Certification	Confirms strict, quality-controlled manufacturing processes.
EN 10204 3.1 Mill Test Report (MTC)	Verifies exact chemical breakdown and mechanical strength tests.
Non-Destructive Testing (NDT)	Includes Hydrostatic testing and Ultrasonic testing to ensure zero leaks or cracks.
Government & Export Clearances	Fully compliant with Indian trade regulations and international export norms.

View & Download Our Full-Resolution Quality Certificates

FAQ

Frequently Asked Questions

What does "YST" mean in IS 4923 steel pipes?

"YST" stands for Yield Stress Steel. It is the standard Indian designation used to identify steel pipes specifically manufactured for structural and load-bearing applications.

What is the main difference between YST 240, YST 310, and YST 355 pipes?

The numbers represent the yield strength of the steel. Grade 240 handles standard structural tasks, 310 offers medium load resistance, and 355 provides high-tensile capacity for heavy construction.

Can IS 4923 pipes be galvanized for rust protection?

Yes. The low carbon and silicon chemistry of these pipes allows for effortless hot-dip galvanizing to prevent rust in exposed environments.

Are ERW and Seamless IS 4923 pipes different in strength?

Both types meet IS 4923 yield strength requirements. ERW (welded) pipes are cost-effective for general framing, while Seamless pipes have no weld seam and are preferred for heavy structural stress.

What is the difference between ERW and Seamless IS 4923 pipes?

ERW pipes are made by electric resistance welding from steel strips and are cost-effective. Seamless pipes are extruded without a weld seam, providing higher uniform pressure rating under extreme loads.

Why source directly from an Indian structural pipe manufacturer?

Direct factory sourcing eliminates middleman markups, gives you access to custom cut lengths, and guarantees authentic mill test certificates with full heat traceability.