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SS400 Seamless Pipes Supplier, Stockist & Exporter in Mumbai, India

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9001:2015 Certified
EN 10204
3.1 MTC Supplied
3–5 Days
Dispatch (Standard Sizes)

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Seamless Pipes in Other Grades

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ISO 9001:2015 • PED 2014/68/EU
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Table of Contents

  1. Introduction
  2. Chemical Composition
  3. Mechanical Properties
  4. Physical & Thermal Properties
  5. Equivalent Grades
  6. Seamless Pipes Details
  7. Manufacturing Process
  8. Sizes & Dimensions
  9. Weight Chart
  10. Pressure Rating
  11. Types Available
  12. Applications
  13. Industries Served
  14. Grade Comparison
  15. Why BB Infras?
  16. Certifications & QC
  17. Export & Packaging
  18. Seamless Pipes Marking
  19. Coating Options
  20. Testing Procedure
  21. Storage Guidelines
  22. Downloads
  23. Cities We Supply
  24. Countries We Export
  25. FAQ
  26. People Also Ask
  27. Related Products
Verified by BB Infras Technical Team  •  Regularly reviewed & updated
SS400 Seamless Pipes – Structural Steel Pipes Supplier India
SS400 Seamless Pipes – Structural Steel Pipes Supplier India SS400 Pipes & Tubes – Ready Stock Steel Pipe Manufacturing – Industrial Plant BB Infras Warehouse – SS400 Seamless Pipes Ready Stock SS400 Seamless Pipes Pipes – Ready for Export Mumbai
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MaterialStructural Steel (JIS)
GradeSS400 / JIS G3101 SS400
StandardJIS G3101 SS400
Pipe TypeSeamless
Size RangePlates 1.6–100 mm; HR coils, angles, channels, bars
ScheduleSCH 10 – XXS (per ASME B36.10M)
LengthSRL (3–5 m) / DRL (6–12 m) / Cut-to-length
End FinishPlain End (PE) / Bevel End (BE) / Threaded (TE)
Tensile Strength400–510 MPa
Yield Strength245 MPa (t ≤ 16 mm)
MTCEN 10204 3.1 Mill Test Certificate
MOQ100 kg (standard sizes)

Quick Answers

What is SS400 Seamless Pipes?
A seamless pipes manufactured to JIS G3101 SS400. SS400 is Japan's most common structural steel, broadly equivalent to ASTM A36 and S235JR. It is the dominant mild steel grade in Asian markets for beams, plates, pipes and fabrications, with wide availability from Japane
What sizes does BB Infras stock?
BB Infras stocks SS400 Seamless Pipes in sizes Plates 1.6–100 mm; HR coils, angles, channels, bars. Same-day quotation from our Mumbai stockyard.
What is the MOQ and delivery time?
MOQ is 100 kg or 1 piece for standard sizes. Standard sizes dispatched within 3–5 business days from our Mumbai stockyard.

SS400 Seamless Pipes – Overview

SS400 is Japan's most common structural steel, broadly equivalent to ASTM A36 and S235JR. It is the dominant mild steel grade in Asian markets for beams, plates, pipes and fabrications, with wide availability from Japanese and Korean mills.

BB Infras sources SS400 Seamless Pipes from approved European, Japanese and domestic mills for heavy engineering fabricators, shipbuilders and infrastructure contractors, with full EN/ASTM mill certification and dimensional compliance reports. We supply SS400 Seamless Pipes in schedules SCH 10 through XXS, in lengths from 3 m single random to 6 m double random, with plain end, bevel end or threaded end as required. PE/BE/TE pipes are stocked for same-day dispatch.

JIS G3101 SS400 Structural Steel (JIS) Sizes: Plates 1.6–100 mm; HR coils, angles, channels, bars EN 10204 3.1 MTC Export Ready

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Chemical Composition of SS400

The following table shows the chemical composition per JIS G3101 SS400.

CPS
≤ 0.25≤ 0.050≤ 0.050

Mechanical Properties of SS400

PropertyValue
Tensile Strength400–510 MPa
Yield Strength245 MPa (t ≤ 16 mm)
Elongation21% min

Physical & Thermal Properties

PropertyValue
Density7.85 g/cm³
Melting Point1420–1530 °C
Thermal Conductivity51 W/m·K
Thermal Expansion11.7 × 10⁻⁶ /°C
Elastic Modulus205 GPa
Specific Heat480 J/kg·K
Electrical Resistivity0.170 μΩ·m

Equivalent Grades of SS400

Standard BodyEquivalent Grade
JISSS400 / G3101
ASTMA36
ENS235JR
ISE250
DINSt37

Seamless Pipes – Product Details

Seamless pipes are manufactured without a longitudinal weld seam by extruding or rotary-piercing a solid billet, then rolling to final dimensions. The absence of a seam gives uniform wall thickness, higher burst pressure and superior fatigue resistance compared to welded alternatives.

Applicable Standards: ASTM A106, API 5L, ASME B36.10, EN 10216, IS 3589

Manufacturing Process: Hot extrusion or Mannesmann rotary-piercing of solid billets, followed by elongation on a plug/mandrel mill and sizing.

Heat Treatment: As-rolled. Normalise at 880–920 °C if needed.

SS400 Seamless Pipes – Manufacturing Process

Seamless Pipes is produced using a controlled sequence of operations to achieve the dimensional and mechanical requirements of JIS G3101 SS400.

Steel Billet
Heating
1200–1280 °C
Rotary Piercing
Mannesmann
Elongation
Plug / Mandrel Mill
Sizing & Straightening
Heat Treatment
As-rolled / Normalised
NDT & Inspection
Hydro Test
Per standard
Marking & Coating
Packing & Dispatch

SS400 Seamless Pipes – Sizes & Dimensions

Size range: Plates 1.6–100 mm; HR coils, angles, channels, bars. The following dimensional data covers standard sizes. Non-standard sizes available on request.

NPSOD (mm)SCH 40 WT (mm)SCH 80 WT (mm)
½"21.32.773.73
1"33.43.384.55
2"60.33.915.54
4"114.36.028.56
6"168.37.1110.97
8"219.18.1812.70
10"273.19.2712.70
12"323.99.5312.70

SS400 Seamless Pipes – Weight Chart

Weight per metre (kg/m) for common sizes and schedules. Formula: W = 0.02466 × t × (OD − t) where t = wall thickness (mm), OD = outside diameter (mm).

NPSOD (mm) SCH 40
WT (mm)		SCH 40
kg/m		 SCH 80
WT (mm)		SCH 80
kg/m		 SCH 160
WT (mm)		SCH 160
kg/m
½"21.32.771.273.731.624.781.95
¾"26.72.871.693.912.205.562.90
1"33.43.382.504.553.246.354.24
1½"48.33.684.055.085.417.147.25
2"60.33.915.445.547.488.7411.11
3"88.95.4911.297.6215.2711.1321.35
4"114.36.0216.078.5622.3213.4933.57
6"168.37.1128.2610.9742.5614.2754.20
8"219.18.1842.5512.7064.6415.0975.92
10"273.19.2760.3112.7081.5515.0995.97
12"323.99.5373.7812.7097.4417.48132.05

* Weights are approximate and calculated per ASME B36.10M. Actual weights may vary ±2% depending on mill tolerance.

SS400 Seamless Pipes – Pressure Rating

Allowable working pressure (bar) per ASME B31.3 at ambient temperature (38 °C). Pressure reduces at elevated temperature — consult ASME B31.3 Table A-1.

NPSOD (mm) SCH 40
WT (mm)		SCH 40
Pressure (bar)		 SCH 80
WT (mm)		SCH 80
Pressure (bar)		 SCH 160
WT (mm)		SCH 160
Pressure (bar)
½"21.32.773063.734124.78528
¾"26.72.872533.913445.56490
1"33.43.382384.553206.35447
1½"48.33.681795.082477.14348
2"60.33.911535.542168.74341
3"88.95.491457.6220211.13294
4"114.36.021248.5617613.49278
6"168.37.119910.9715314.27199
8"219.18.188812.7013615.09162
10"273.19.278012.7010915.09130
12"323.99.536912.709217.48127

* Pressures are indicative, calculated using Barlow's formula with 72% SMYS design factor. For engineering design, refer to ASME B31.3 / B31.1.

Types of SS400 Seamless Pipes

  • Round seamless
  • Square & rectangular hollow sections
  • Boiler tubes (cold-drawn)
  • Hydraulic & precision tubes

Applications of SS400 Seamless Pipes

Oil & gas pipelines
Refineries & petrochemical plants
Power generation boilers
High-pressure hydraulic systems
Structural hollow sections

Industries We Serve

Oil & Gas
Petrochemical
Power Generation
Chemical
Marine & Offshore
Construction
Water & Sewage
Pharmaceutical
Food & Beverage
Automotive
Fertiliser
Cryogenic / LNG

Ready to order SS400 Seamless Pipes?

Stock available in Mumbai. Same-day quotation. Export documentation included.

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SS400 – Grade Specification

StandardCategory Tensile StrengthYield StrengthElongation
JIS G3101 SS400 ✓ Structural Steel (JIS) 400–510 MPa245 MPa (t ≤ 16 mm)21% min
JIS (SS400 / G3101) Equivalent See equivalent grades table above
ASTM (A36) Equivalent See equivalent grades table above
EN (S235JR) Equivalent See equivalent grades table above
IS (E250) Equivalent See equivalent grades table above
DIN (St37) Equivalent See equivalent grades table above

* All values are minimum guaranteed per JIS G3101 SS400. Actual mill certificates may show higher values.

Why Buy SS400 Seamless Pipes from BB Infras?

Ready Stock Large inventory of SS400 Seamless Pipes in popular sizes maintained in our Mumbai warehouse for immediate dispatch.
Certified Material All material supplied with EN 10204 3.1 Mill Test Certificates from NABL-accredited labs. TPI by SGS, BV, TUV on request.
Worldwide Export We export SS400 Seamless Pipes to 80+ countries with complete export documentation — COO, packing list, B/L, fumigation certificates.
Competitive Pricing Direct mill sourcing and bulk buying ensures competitive prices. No middlemen. Transparent pricing with no hidden charges.
Fast Delivery Standard sizes dispatched within 3–5 business days. Custom sizes within 3–4 weeks. Urgent orders accommodated.
Value-Added Services Cut-to-length, bevelling, threading, galvanising, painting, marking & stencilling available in-house.
Technical Support Our metallurgical team assists with grade selection, standard interpretation, and material substitution queries.
MSME Registered Registered MSME supplier. Eligible for GeM portal procurement and government tenders.

Certifications & Quality Inspection

Every SS400 Seamless Pipes supplied by BB Infras undergoes the following quality controls:

ISO 9001:2015 EN 10204 3.1 MTC PED 2014/68/EU NACE MR0175 BIS / IS Marked NABL Lab Reports TPI Available

Quality Inspection Checklist

  • Chemical composition analysis (OES / wet analysis)
  • Mechanical testing: tensile, yield, elongation, impact
  • Dimensional inspection per applicable ASME standard
  • Visual and surface finish inspection
  • Hydrostatic or pneumatic pressure testing
  • Non-Destructive Testing: UT, RT, MT, PT on request
  • Positive Material Identification (PMI) on request

Export Packaging & MOQ

  • Minimum Order Quantity (MOQ): 100 kg or 1 piece (standard sizes); 500 kg for custom sizes
  • Packing for Pipes/Tubes: Bundled with steel strapping, plastic end caps, moisture-proof wrapping
  • Packing for Fittings/Flanges: Wooden box / wooden pallet, plywood case for heavy items
  • Sea Freight: FCL / LCL container, fumigation certificate provided
  • Air Freight: Available for urgent requirements
  • Documents: Commercial Invoice, Packing List, Certificate of Origin, MTC, Bill of Lading, Insurance Certificate
  • Marking: Heat number, grade, size, schedule, standard per ASTM A5.40 / ASME marking requirements

Seamless Pipes Marking & Identification

Every SS400 Seamless Pipes supplied by BB Infras is marked per JIS G3101 SS400 and ASME marking requirements. Standard marking sequence:

BB INFRAS | JIS G3101 SS400 | TYPE | 4" SCH 40 | SMLS | HEAT: XXXXXX | NDE
  • Manufacturer name / mark — BB Infras or mill of origin
  • Specification — JIS G3101 SS400
  • Grade — SS400
  • Type — S (Seamless)
  • Size & schedule — NPS × SCH or wall thickness
  • Heat / lot number — for full traceability to MTC
  • Length — actual pipe length in metres
  • NDE symbol — if nondestructive examination was performed

Coating & Surface Finish Options

Coating TypeStandardApplicationLead Time
Black (Mill Finish)Per standardGeneral service, indoor pipingIn Stock
Hot-Dipped Galvanised (HDG)ASTM A123Outdoor, water & plumbing3–5 days
Oil Coated—Export transit corrosion protectionIn Stock
FBE (Fusion Bonded Epoxy)CSA Z245.20Underground water/gas pipelines2–3 weeks
3LPE (3-Layer Polyethylene)DIN 30670Buried oil & gas pipelines2–3 weeks
Coal Tar EpoxyAWWA C203Offshore & marine1–2 weeks

Testing & Inspection Procedure

All SS400 Seamless Pipes supplied by BB Infras undergo a multi-stage inspection and testing process before dispatch:

#Test / InspectionStandard / MethodAcceptance
1Chemical Composition (OES)ASTM E415Per JIS G3101 SS400 Table 1
2Tensile & Yield StrengthASTM E8≥400–510 MPa / ≥245 MPa (t ≤ 16 mm)
3ElongationASTM E8≥21% min
4Hardness (HB)ASTM E10Per standard max
5Hydrostatic TestJIS G3101 SS400 / ASME B31.3Leak-free at test pressure
6Dimensional InspectionASME B36.10MWithin tolerance
7Visual & SurfaceASTM A530 / MSS SP-55Free from defects
8Ultrasonic Testing (UT)ASTM E213 (on request)No sub-surface defects
9PMI (XRF)ASTM E1476 (on request)Grade confirmation

Storage & Handling Guidelines

  • Store on wooden dunnage or pipe racks — never directly on concrete to avoid moisture-induced corrosion.
  • Stack with appropriate separators; observe safe stack heights to prevent deformation.
  • Apply plastic end caps or plugs to all open ends to prevent ingress of moisture, dust and insects.
  • Keep material dry and ventilated; store under cover in humid or coastal climates.
  • Use nylon slings or padded lifting hooks — never bare wire rope directly on surface.
  • For long-term storage (>6 months), re-apply protective oil coating or wrap with VCI (Vapour Corrosion Inhibitor) film.
  • Identify items with heat number tags throughout storage for full MTC traceability.

Downloads & Technical Resources

Request product documentation from our technical team. Available on enquiry:

Contact our technical team with your enquiry details and we will share the relevant document within 24 hours.

SS400 Seamless Pipes Supplier in India

BB Infras supplies SS400 Seamless Pipes to customers across India from our Mumbai stockyard. We serve all major industrial hubs — refineries in Jamnagar and Haldia, petrochemical clusters in Dahej and Panipat, shipyards in Kochi and Visakhapatnam, and fabrication workshops across Pune, Rajkot, Surat and Coimbatore — with same-day quotation and fast dispatch.

View all cities we supply ▾
MumbaiDelhi BangaloreChennai HyderabadPune AhmedabadKolkata SuratJaipur RajkotVadodara CoimbatoreNagpur IndoreBhopal LucknowKanpur PatnaBhubaneswar VisakhapatnamKochi ChandigarhLudhiana AmritsarFaridabad GurgaonNoida AgraNashik AurangabadSolapur BhavnagarJamnagar AnkleshwarHaldia MundraParadip

SS400 Seamless Pipes Exporter – Countries We Ship To

BB Infras exports SS400 Seamless Pipes to 80+ countries with complete export documentation — Certificate of Origin, Material Test Certificate, Packing List, Bill of Lading and Fumigation Certificate. We are a trusted exporter to UAE, Saudi Arabia, Qatar, Oman and Kuwait in the Middle East; to Singapore, Malaysia, Indonesia and Vietnam in Southeast Asia; to South Africa, Nigeria and Kenya in Africa; and to the USA, UK, Germany and Netherlands in Europe and North America.

View all export countries ▾
USAUAE Saudi ArabiaQatar KuwaitOman BahrainIraq UKGermany FranceItaly SpainNetherlands BelgiumPoland TurkeyRussia BrazilMexico ArgentinaColombia AustraliaNew Zealand South AfricaNigeria KenyaEgypt MalaysiaSingapore IndonesiaThailand VietnamPhilippines South KoreaJapan BangladeshSri Lanka PakistanCanada NorwaySweden DenmarkSwitzerland AustriaIsrael JordanKazakhstan

Frequently Asked Questions

What is SS400 Seamless Pipes?
SS400 Seamless Pipes is a seamless pipes manufactured to the JIS G3101 SS400 specification. SS400 is Japan's most common structural steel, broadly equivalent to ASTM A36 and S235JR. It is the dominant mild steel grade in Asian markets for beams, plates, pipes and fabrications, with wide availability from Japanese and Korean mills.
What sizes of SS400 Seamless Pipes does BB Infras supply?
BB Infras supplies SS400 Seamless Pipes in the size range Plates 1.6–100 mm; HR coils, angles, channels, bars. Special sizes are available on request with 3–4 weeks lead time.
What is the chemical composition of SS400?
See the chemical composition table above for the complete element breakdown per the standard.
What is the tensile strength of SS400 Seamless Pipes?
Per JIS G3101 SS400, the minimum tensile strength is 400–510 MPa and the yield strength is 245 MPa (t ≤ 16 mm).
Do you supply SS400 Seamless Pipes with MTC?
Yes. All products are supplied with EN 10204 3.1 Mill Test Certificates. Third-party inspection by SGS, TUV, BV or Lloyd's is available on request.
What is the equivalent grade of SS400?
See the equivalent grades table above for ASTM, EN, DIN, JIS and IS cross-references.
What are the applications of SS400 Seamless Pipes?
SS400 Seamless Pipes is used in: Oil & gas pipelines, Refineries & petrochemical plants, Power generation boilers, High-pressure hydraulic systems, Structural hollow sections.
What is the heat treatment for SS400?
As-rolled. Normalise at 880–920 °C if needed.
Can BB Infras export SS400 Seamless Pipes worldwide?
Yes. BB Infras exports to 80+ countries. We provide all export documentation including COO, packing list, bill of lading and fumigation certificates.
What is the minimum order quantity for SS400 Seamless Pipes?
Minimum order quantity is 100 kg or 1 piece for standard sizes. For custom or exotic grades, MOQ may be 500 kg. Contact us for exact pricing.
What schedules or pressure classes are available for SS400 Seamless Pipes?
Schedules SCH 10 through XXS per ASME B36.10M are available for pipes. Pressure classes 150# through 2500# per ASME B16.5 for flanges. Contact us for exact stock availability.
What coating options are available for SS400 Seamless Pipes?
SS400 Seamless Pipes is available in mill finish (black), hot-dipped galvanised (HDG), oil-coated, FBE and 3LPE coating on request. Specify coating type at time of enquiry.
Do you offer cut-to-length or value-added processing?
Yes. BB Infras offers cut-to-length, bevelling (30° per AWS/ASME), threading (NPT per ASME B1.20.1), grooving, galvanising, painting and stencilling in-house. Custom lengths from 0.5 m to 12 m available.
What are your payment terms and delivery methods?
We accept T/T, L/C at sight, and advance payment. Delivery is ex-works Mumbai or FOB JNPT/Nhava Sheva. For domestic customers we offer road transport; for export we arrange FCL/LCL container with full documentation.
Is SS400 suitable for high-temperature service?
SS400 is rated per JIS G3101 SS400. Heat treatment: As-rolled. Normalise at 880–920 °C if needed.. Contact our technical team for temperature-derated stress values per ASME B31.3 Appendix A.

Get the best price for SS400 Seamless Pipes

Talk to our sales team — available Mon–Sat, 9 AM – 7 PM IST. Same-day quotes.

Contact Us Today +91-9152677155
Reviewed by Abhishek Virkar
Industrial Piping Specialist • 12+ Years Experience • BB Infras, Mumbai
This page has been reviewed for technical accuracy against JIS G3101 SS400 standard requirements. Last updated: June 2026.

People Also Ask

Is SS400 pipe seamless or welded?

SS400 is available in both seamless and welded (ERW, SAW) forms under JIS G3101 SS400. BB Infras stocks seamless Seamless Pipes and welded variants. Seamless offers higher burst pressure and superior fatigue resistance.

What schedules are available for SS400 Seamless Pipes?

Per ASME B36.10M: SCH 10, 20, 30, 40 (Standard), 60, 80 (Extra Strong), 100, 120, 140, 160 and XXS. BB Infras stocks SCH 40 and SCH 80 in popular sizes for immediate dispatch.

Can SS400 pipe be hot-dip galvanised?

Yes. Galvanising per ASTM A123 is available. Galvanised SS400 pipe is suitable for water supply, plumbing and outdoor structural applications. Specify HDG at time of enquiry.

What is the tensile and yield strength of SS400?

Per JIS G3101 SS400: minimum tensile is 400–510 MPa and minimum yield is 245 MPa (t ≤ 16 mm). Actual mill certificates typically show values 5–15% above the standard minimum.

What is the price of SS400 Seamless Pipes in India?

Prices vary by size, schedule, quantity and current steel market rates. Contact BB Infras for a firm quotation from our Mumbai stockyard.

Authoritative Standards Referenced

StandardIssuing BodyScope
JIS G3101 SS400ASTM / ASMEMaterial specification for SS400
ASME B36.10MASMEWelded and seamless wrought steel pipe — dimensional standard
ASTM A530ASTMGeneral requirements for specialised carbon and alloy steel pipe
EN 10204:2004CENMetallic products — types of inspection documents (3.1 MTC)
NACE MR0175 / ISO 15156NACE/ISOMaterials for H₂S service in oil and gas production
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