Table of Contents
- Introduction
- Chemical Composition
- Mechanical Properties
- Physical & Thermal Properties
- Equivalent Grades
- Coupling Details
- Manufacturing Process
- Sizes & Dimensions
- Types Available
- Applications
- Industries Served
- Grade Comparison
- Why BB Infras?
- Certifications & QC
- Export & Packaging
- Coupling Marking
- Coating Options
- Testing Procedure
- Storage Guidelines
- Downloads
- Cities We Supply
- Countries We Export
- FAQ
- People Also Ask
- Related Products
| Material | Structural Steel |
| Grade | S235JR / EN 10025-2 S235JR / DIN 1.0038 |
| Standard | EN 10025-2 S235JR / DIN 1.0038 |
| Type | Coupling |
| Size Range | Plates 1.5–150 mm; HR coils, sections, bars |
| Pressure Class | 2000# – 9000# (ASME B16.11) |
| Tensile Strength | 360–510 MPa |
| Yield Strength | 235 MPa (t ≤ 16 mm) |
| MTC | EN 10204 3.1 Mill Test Certificate |
| MOQ | 100 kg (standard sizes) |
Quick Answers
S235JR Coupling – Overview
S235JR is the most widely used European structural steel, equivalent to ASTM A36. With 235 MPa yield and guaranteed 27 J at +20 °C it covers the majority of general-purpose structural fabrication requirements across construction and manufacturing.
BB Infras sources S235JR Coupling 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. S235JR Coupling is supplied to ASME B16.11 in Class 2000#, 3000# and 6000# with NPT or socket weld ends. Sizes from ¼” to 4” NB are available ex-stock from our Mumbai warehouse.
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Request Quote WhatsAppChemical Composition of S235JR
The following table shows the chemical composition per EN 10025-2 S235JR / DIN 1.0038.
| C | Mn | P | S | N |
|---|---|---|---|---|
| ≤ 0.17 (t ≤ 16 mm) | ≤ 1.40 | ≤ 0.035 | ≤ 0.035 | ≤ 0.012 |
Mechanical Properties of S235JR
| Property | Value |
|---|---|
| Tensile Strength | 360–510 MPa |
| Yield Strength | 235 MPa (t ≤ 16 mm) |
| Elongation | 26% min |
| Charpy (+20 °C) | 27 J |
Physical & Thermal Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1420–1530 °C |
| Thermal Conductivity | 50 W/m·K |
| Thermal Expansion | 12.0 × 10⁻⁶ /°C |
| Elastic Modulus | 210 GPa |
| Specific Heat | 460 J/kg·K |
| Electrical Resistivity | 0.170 μΩ·m |
Equivalent Grades of S235JR
| Standard Body | Equivalent Grade |
|---|---|
| EN | S235JR / 1.0038 |
| ASTM | A36 |
| IS | E250 |
| JIS | SS400 |
| BS | 43A |
Coupling – Product Details
Applicable Standards: ASME B16.11, BS 3799, MSS SP-83
Manufacturing Process: Forged from bar stock; machined to socket or thread specifications.
Heat Treatment: As-rolled standard. Normalise if Charpy sub-grade required.
S235JR Coupling – Manufacturing Process
Coupling is produced using a controlled sequence of operations to achieve the dimensional and mechanical requirements of EN 10025-2 S235JR / DIN 1.0038.
900–1100 °C
Thread / Socket bore
Per ASME B16.11
S235JR Coupling – Sizes & Dimensions
Size range: Plates 1.5–150 mm; HR coils, sections, bars. The following dimensional data covers standard sizes. Non-standard sizes available on request.
| NPS | OD (mm) | SW Bore (mm) | Threaded Class 3000 |
|---|---|---|---|
| ½" | 21.3 | 13.8 | ½" NPT |
| ¾" | 26.7 | 17.3 | ¾" NPT |
| 1" | 33.4 | 22.2 | 1" NPT |
| 1½" | 48.3 | 32.5 | 1½" NPT |
| 2" | 60.3 | 40.9 | 2" NPT |
| 3" | 88.9 | 62.7 | 3" NPT |
| 4" | 114.3 | 81.8 | 4" NPT |
Types of S235JR Coupling
- Full Coupling (SW)
- Half Coupling (SW)
- Reducing Coupling
- Threaded Coupling
Applications of S235JR Coupling
Industries We Serve
Ready to order S235JR Coupling?
Stock available in Mumbai. Same-day quotation. Export documentation included.
Email Quote Call NowS235JR – Grade Specification
| Standard | Category | Tensile Strength | Yield Strength | Elongation |
|---|---|---|---|---|
| EN 10025-2 S235JR / DIN 1.0038 ✓ | Structural Steel | 360–510 MPa | 235 MPa (t ≤ 16 mm) | 26% min |
| EN (S235JR / 1.0038) | Equivalent | See equivalent grades table above | ||
| ASTM (A36) | Equivalent | See equivalent grades table above | ||
| IS (E250) | Equivalent | See equivalent grades table above | ||
| JIS (SS400) | Equivalent | See equivalent grades table above | ||
| BS (43A) | Equivalent | See equivalent grades table above | ||
* All values are minimum guaranteed per EN 10025-2 S235JR / DIN 1.0038. Actual mill certificates may show higher values.
Why Buy S235JR Coupling from BB Infras?
| Ready Stock | Large inventory of S235JR Coupling 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 S235JR Coupling 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 S235JR Coupling supplied by BB Infras undergoes the following quality controls:
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
Coupling Marking & Identification
Every S235JR Coupling supplied by BB Infras is marked per EN 10025-2 S235JR / DIN 1.0038 and ASME marking requirements. Standard marking sequence:
- Manufacturer name / mark
- Material specification — EN 10025-2 S235JR
- Product type — Coupling
- Wall thickness / Schedule
- Heat / lot number — for MTC traceability
Coating & Surface Finish Options
| Coating Type | Standard | Application | Lead Time |
|---|---|---|---|
| Black (Mill Finish) | Per standard | General process service | In Stock |
| Yellow Zinc Chromate Primer | — | Corrosion protection in transit | In Stock |
| Hot-Dipped Galvanised (HDG) | ASTM A123 | Plumbing & utility service | 3–5 days |
| Two-Coat Epoxy | — | Chemical & offshore service | 1–2 weeks |
Testing & Inspection Procedure
All S235JR Coupling supplied by BB Infras undergo a multi-stage inspection and testing process before dispatch:
| # | Test / Inspection | Standard / Method | Acceptance |
|---|---|---|---|
| 1 | Chemical Composition (OES) | ASTM E415 | Per EN 10025-2 S235JR Table 1 |
| 2 | Tensile & Yield Strength | ASTM E8 | ≥360–510 MPa / ≥235 MPa (t ≤ 16 mm) |
| 3 | Elongation | ASTM E8 | ≥26% min |
| 4 | Hardness (HB) | ASTM E10 | Per standard max |
| 5 | Hydrostatic Test | EN 10025-2 S235JR / ASME B31.3 | Leak-free at test pressure |
| 6 | Dimensional Inspection | ASME B16.9 / B16.11 | Within tolerance |
| 7 | Visual & Surface | ASTM A530 / MSS SP-55 | Free from defects |
| 8 | Ultrasonic Testing (UT) | ASTM E213 (on request) | No sub-surface defects |
| 9 | PMI (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.
S235JR Coupling Supplier in India
BB Infras supplies S235JR Coupling 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.
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S235JR Coupling Exporter – Countries We Ship To
BB Infras exports S235JR Coupling 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.
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Frequently Asked Questions
Get the best price for S235JR Coupling
Talk to our sales team — available Mon–Sat, 9 AM – 7 PM IST. Same-day quotes.
Contact Us Today +91-9152677155People Also Ask
What standard does S235JR Coupling conform to?
S235JR Coupling conforms to ASME B16.11, BS 3799, MSS SP-83. Dimensional inspection is carried out per these standards before dispatch.
What end connections are available for S235JR Coupling?
Available with buttweld (BW) per ASME B16.25, socket weld (SW) and threaded (NPT/BSP) ends. Specify end connection at enquiry.
What is the tensile and yield strength of S235JR?
Per EN 10025-2 S235JR: minimum tensile is 360–510 MPa and minimum yield is 235 MPa (t ≤ 16 mm).
Do you supply S235JR Coupling with MTC?
Yes. EN 10204 3.1 Mill Test Certificates supplied with all products. TPI by SGS, TUV, BV or Lloyd's available on request.
What is the price of S235JR Coupling in India?
Prices vary by size, schedule, quantity and current market rates. Contact BB Infras for a firm quotation from our Mumbai stockyard.
Authoritative Standards Referenced
| Standard | Issuing Body | Scope |
|---|---|---|
| EN 10025-2 S235JR / DIN 1.0038 | ASTM / ASME | Material specification for S235JR |
| ASME B16.11 | ASME | Forged fittings — socket welding and threaded |
| EN 10204:2004 | CEN | Metallic products — types of inspection documents (3.1 MTC) |
| NACE MR0175 / ISO 15156 | NACE/ISO | Materials for H₂S service in oil and gas production |
