IS / BIS / EN Certified

IS 1161 YST 210 / 240 / 355 Pipes Manufacturer in India

Constructing modern civil infrastructure, high-rise frameworks, and industrial plants requires structural piping capable of carrying immense loads without compromising safety. As a premier IS 1161 YST 210 Pipes Manufacturer in India, we supply heavy-duty tubular carbon steel solutions tailored for superior tensile capacity, dimensional consistency, and long-term durability.

Our manufacturing facility produces an extensive inventory of IS 1161 carbon steel pipes across YST 210, YST 240, YST 310, and YST 355 grades. Engineered in round structural profiles, these pipes meet diverse engineering blueprints for both commercial and heavy-duty industrial developments. Whether your site needs versatile circular hollow sections for temporary staging or high-yield structural tubes for permanent load-bearing frames, we deliver factory-direct material ready for immediate deployment.

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Round / CircularProfiles Available

YST 210 / 240 / 355Available Grades

1/2″ NB to 36″ NBSize Range

Certified IS 1161 YST 210, YST 240, and YST 355 carbon steel pipes and structural circular hollow sections stocked at the factory

Overview

What are IS 1161 YST 210 / 240 / 355 Carbon Steel Pipes?

IS 1161 carbon steel pipes are tubular structural sections specifically engineered for load distribution, structural framing, and staging operations under Indian standard specifications. In this grading system, "YST" denotes Yield Stress Steel, and the trailing numbers (210, 240, 310, and 355) signify the minimum yield strength threshold of the metal, expressed in megapascals.

These circular hollow sections deliver an excellent strength-to-weight profile, superior resistance against torsional forces, and uniform wall thickness across every batch. Manufactured through electric resistance welding (ERW) or seamless hot-finishing processes, IS 1161 YST 240 Pipes and IS 1161 YST 355 Pipes maintain structural stability while allowing contractors to cut, bend, and weld components efficiently in the field.

While IS 1161 governs circular tubular members, many building layouts mandate box-section structural profiles for vertical column work. If your engineering drawings call for square or rectangular profiles engineered to similar yield criteria, browse our line of IS 4923 YST 240 / 310 / 355 Carbon Steel Pipes suited for heavy structural trusses and architectural columns.

Grade Comparison: YST 210 vs. YST 240 vs. YST 355

Selecting the correct grade involves balancing expected load stress, structural spans, and fabrication flexibility. Use this quick snapshot to evaluate performance differences across all four designations:

Property	YST 210	YST 240	YST 355
Primary Strength Level	Standard Ductility Grade	General Construction Grade	Ultra High-Tensile Grade
Min. Yield Strength	210 MPa	240 MPa	355 MPa
Min. Tensile Strength	330 MPa	410 MPa	490 - 510 MPa
Best Suited For	Modular scaffolding, staging towers & light posts	Commercial building frames, railings & agricultural structures	Bridge supports, piling casings, crane booms & high-rises
Formability & Bending	Maximum bending capacity & easiest to weld	High ductility with easy cold-forming	Rigid composition for 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 1161 Pipes

Integrating certified IS 1161 piping into your structural assembly ensures high mechanical endurance against static loads and dynamic operational stresses. As an established IS 1161 YST 240 Pipes Manufacturer in India, we maintain precise carbon equivalent ratios across all batches, permitting rapid, crack-free field welding without requiring specialized pre-heating procedures. Furthermore, the clean surface scale on our circular tubes ensures smooth adherence for protective paints, epoxy linings, and hot-dip galvanization treatments. Partnering directly with an IS 1161 YST 355 Pipes Manufacturer in India gives engineering teams the ability to slim down member thickness without sacrificing safety factors, helping lower total structural dead-weight on foundations.

Factory Direct Rates for IS 1161 YST Pipes (Price Per KG)

By leveraging large-scale manufacturing and bulk raw material purchasing, we offer direct factory rates that minimize contractor procurement expenses. Review our indicative pricing table below:

Material Grade & Pipe Profile	Indicative Market Price (INR)	Sizing Covered
IS 1161 YST 210 / 240 Pipes (ERW / Seamless)	₹42 to ₹65 / Kg	1/2" to 24" Outer Diameter
IS 1161 YST 355 Pipes (Heavy Wall)	₹65 to ₹80 / Kg	Custom Thickness / Schedules

Note: These prices serve as general industry benchmarks. Final quotations vary depending on global steel market shifts, specific wall thickness demands, and overall order volume.

Specifications of IS 1161 Carbon Steel Pipes

Ordering straight from a certified mill ensures exact outer diameter control and full material traceability. Whether your schedule calls for general-purpose IS 1161 YST 210 Pipes or heavy-wall structural piping, our manufacturing scope covers all standard dimensions:

Feature	Available Options
Standard Grade	IS 1161 (Steel Tubes for Structural Purposes)
Pipe Sizes	1/2″ NB to 36″ NB (Custom sizes up to 60″)
Shapes Available	Circular (Round) Structural Sections
Thickness Range	2.0 mm to 40.0 mm (SCH 10 through SCH 160, XS, XXS)
Manufacturing Method	Seamless (HFS/CDS), Electric Resistance Welded (ERW), or Fabricated
Pipe Lengths	Single Random (4 to 7 m), Double Random, Cut-to-Length (up to 18 m)
Pipe Ends	Plain End (PE), Beveled End (BE), Threaded & Coupled

Chemical Composition Requirements

The chemistry of IS 1161 structural steel is carefully balanced to deliver high tensile performance while preserving formability and field weldability:

Element	YST 210	YST 240	YST 310	YST 355
Carbon (C) Max	0.12%	0.16%	0.25%	0.25%
Manganese (Mn) Max	0.60%	0.90%	1.30%	1.60%
Phosphorus (P) Max	0.040%	0.040%	0.040%	0.040%
Sulfur (S) Max	0.040%	0.040%	0.040%	0.040%

Mechanical Strength of IS 1161 Pipe Grades

Understanding yield and tensile thresholds helps structural engineers select the precise grade needed for safe load distribution:

Property	YST 210	YST 240	YST 310	YST 355
Yield Strength (Min)	210 MPa	240 MPa	310 MPa	355 MPa
Tensile Strength (Min)	330 MPa	410 MPa	450 MPa	490 - 510 MPa
Elongation (Min)	20%	17%	14%	10% to 14%
Primary Application	Scaffolding & staging	General construction	Roof trusses & sheds	Bridges & heavy columns

What is the difference between Yield Strength and Tensile Strength?

Yield strength indicates the limit where steel begins to deform permanently under load. Tensile strength defines the peak load or pulling force the material withstands right before complete physical fracture. Every shipment we dispatch undergoes rigorous mechanical and flattening tests to verify compliance.

Dimensional Tolerances of IS 1161 Steel Pipes

Strict adherence to dimensional limits ensures seamless fit-up, accurate joint alignment, and predictable welding performance on structural sites:

Parameter / Parameter Detail	Allowed Variation
Outside Diameter (Up to 48.3 mm OD)	+0.4 mm / -0.8 mm
Outside Diameter (Over 48.3 mm OD)	± 1.0%
Wall Thickness (All Circular Sizes)	-10% (Upper limit unconstrained)
Single Pipe Weight (Light Class)	+10% / -8%
Single Pipe Weight (Medium & Heavy Class)	± 10%
Bulk Weight (10+ MT Lot)	± 7.5%
Straightness Deviation (Total Length)	1 mm per 1000 mm (0.1% max)

Equivalent International Standards for IS 1161 Steel Pipes

Our structural piping meets international cross-reference standards, facilitating smooth approval for global export contracts:

Region / Standard	Equivalent Steel Grade
Europe (EN)	EN 10210 / EN 10219 S235JRH / S275J0H / S355J2H
United Kingdom (BS)	BS 1775 / BS 4360 Grade 40A / 43C
Germany (DIN)	DIN 2440 / DIN 2441 (St 33 / St 37-2 / St 52-3)
International (ISO)	ISO 65 / ISO 559

Applications

Where are IS 1161 Circular Hollow Sections Used?

Circular structural tubes offer multi-directional strength, making them top choices across engineering and industrial sectors:

APP / 01

Infrastructure & Commercial High-Rises

Integrated into roof trusses, atrium space frames, structural columns, and airport terminal canopies.

APP / 02

Bridges & Civil Engineering

Utilized for pedestrian bridge pillars, highway signage gantries, piling casings, and structural arches.

APP / 03

Scaffolding & Staging Systems

Essential for building modular scaffolding frames, temporary shoring towers, and heavy staging platforms.

APP / 04

Industrial Warehousing & Racks

Form the core load-bearing posts for multi-tier storage racking systems and heavy mezzanine flooring.

APP / 05

Heavy Machinery & Equipment

Applied in constructing crane booms, heavy vehicle sub-frames, conveyor structures, and agricultural equipment mounts.

APP / 06

Architectural Elements

Ideal for exposed structural railings, safety barriers, exterior facades, and decorative fencing posts.

Quality Assurance

Quality Testing Protocols & Certified Credentials

To guarantee project-ready quality and site safety, all materials undergo exhaustive physical and chemical testing:

Proven Market Authority & Official Government Certifications

CREDENTIALS

Certificate / Test Type	Purpose & Safety Utility
ISO 9001:2015 Certification	Validates quality management systems throughout production.
EN 10204 3.1 Mill Test Report (MTC)	Verifies exact heat codes, chemical breakdowns, and tensile stress tests.
Non-Destructive Testing (NDT)	Hydrostatic testing, eddy current inspection, and ultrasonic weld testing.
Government & Export Clearances	Fully authorized for major Indian public works and export dispatches.

View & Download Our Full-Resolution Quality Certificates

FAQ

Frequently Asked Questions

What does "YST" stand for in IS 1161 steel pipes?

"YST" stands for Yield Stress Steel. It represents the official designation under Indian Standards for steel tubes manufactured for structural load-bearing applications.

How do YST 210, YST 240, and YST 355 pipe grades differ?

The numeric value indicates minimum yield strength in megapascals (MPa). YST 210 handles lighter staging/scaffolding tasks, YST 240 is suited for general structural framing, and YST 355 is built for high-tensile, heavy infrastructure projects.

What is the difference between IS 1161 and IS 4923 standards?

IS 1161 covers circular (round) steel tubes intended for general structural and scaffolding applications. IS 4923 specifically governs square and rectangular hollow steel sections used for structural columns, trusses, and box-section framing.

Can IS 1161 carbon steel pipes be galvanized?

Yes. The low-carbon formulation allows hot-dip galvanizing, applying a zinc coating that guards against environmental rust and outdoor exposure.

What is the structural difference between ERW and Seamless IS 1161 pipes?

Both meet IS 1161 load criteria. ERW (Electric Resistance Welded) pipes are produced from rolled strip steel and offer cost savings for general framing. Seamless pipes have no longitudinal seam, providing uniform stress resistance under extreme pressure or bending loads.

How do I request a wholesale price quote?

Contact our engineering sales team with your specific requirements including grade, size, wall thickness, and quantity. We provide immediate factory-direct quotes with delivery timelines.

Request a Technical Sourcing Quote

Source certified structural materials backed by mill guarantees and quick dispatch schedules. Whether you require standard stock lengths or custom heavy-wall specifications, contact our engineering sales office today for immediate factory quotes.

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