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Inox Steel India is a leading supplier of ASTM A333 Grade 6 Low-Temperature Carbon Steel Pipes, used where pipelines operate in sub-zero and cryogenic environments.
A333 Gr 6 is the global industry standard for LNG, LPG, low-temperature hydrocarbon service, cryogenic gas lines, and cold-region processing plants.
Regular carbon steel becomes brittle under low temperatures, leading to cracks and catastrophic failures.
A333 Grade 6 is engineered to remain tough, ductile, and impact-resistant at −45°C.
That’s why LTCS is mandatory for:
Inox Steel India supplies LTCS pipes with full impact test certification, PMI, hydro, NDT, and TPI-approved documentation.
Low-Temperature Service (LTCS) pipes are used when operating temperatures fall below 0°C, especially in ranges between −45°C and −196°C.
At low temperatures, materials must resist:
A333 Grade 6 offers:
✔ Superior Charpy impact strength at −45°C
✔ High pressure stability in cryogenic environments
✔ Excellent weldability
✔ Dimensional stability
✔ Good toughness & ductility over long-term service
🧪 Why A333 Gr 6 Is the Most Used LTCS Grade
A333 Gr 6 is normally used along with:
Together, they create a complete Low-Temperature piping system.
Raw Material Selection
Low carbon steel with controlled Mn & Ni for low-temperature performance.
Hot Piercing / Rolling
Heat Treatment
Low-Temperature Impact Testing
Mandatory Charpy V-Notch test at −45°C.
NDT & Inspection
Marking & Export Packaging
Grade • Standard • Heat No. • OD • WT • LTCS marking.
| Performance Factor | A333 Gr 6 |
|---|---|
| Low-temperature toughness | Excellent |
| Brittleness at sub-zero | Very Low |
| Cryogenic impact safety | High |
| Pressure resistance | Strong |
| Weldability | Excellent |
| Fatigue life | Long |
A333 Gr 6 provides consistent performance across temperature fluctuations — essential for LNG/LPG loading-unloading, cold storage, and gas plants.
| Parameter / Property | ASTM A333 Grade 6 |
|---|---|
| Material Type | Low-Temperature Carbon Steel (LTCS) |
| Impact Test Requirement | Mandatory @ −45°C (Charpy V-Notch) |
| Min Yield Strength | 240 MPa |
| Min Tensile Strength | 415 MPa |
| Elongation (%) | 30% |
| Carbon (C) | ≤ 0.30% |
| Manganese (Mn) | 0.29–1.06% |
| Phosphorus (P) | ≤ 0.025% |
| Sulphur (S) | ≤ 0.025% |
| Nickel (Ni) | ≤ 0.40% |
| Temperature Suitability | −45°C to +350°C |
| Pipe Type | Seamless (SMLS) |
| Delivery Condition | Normalized / Heat Treated |
| Available OD Range | ½” – 36” |
| Wall Thickness Range | SCH 20 – XXS |
| Common Uses | Cryogenic Lines, LNG, LPG, Low Temp Gas Lines |
| Equivalent Grades | EN 10216-3 P355NL1 / LTCS |
| NDT Requirements | UT / Eddy Current / Hydro |
| Mandatory Tests | Impact test at −45°C |
| End Conditions | Plain / Bevelled |
| Surface Conditions | Black / Oiled |
| HSN Code | 730419 |
| Certificates Provided | EN 10204 3.1 / 3.2 |
LNG / LPG Plants
Refineries & Petrochemicals
Gas Processing Units
Cold Climate Operations
Chemical & Fertilizer Plants
Inox Steel India supplies LTCS material packages including flanges, pipes, fittings, valves & bends.
A333 Grade 6 (LTCS) is engineered for pipelines that experience sub-zero conditions, cold climates, and cryogenic environments.
Typical Applications
Service Characteristics
Industries
LNG | LPG | Refinery | Petrochemical | Gas Processing | Fertilizer | Cold Storage | Refrigeration Plants
| NB Size | OD (mm) | SCH 40 WT (mm) | SCH 80 WT (mm) | SCH 160 WT (mm) |
|---|---|---|---|---|
| ½” | 21.3 | 2.77 | 3.73 | 4.78 |
| 1″ | 33.4 | 3.38 | 4.55 | 6.35 |
| 2″ | 60.3 | 3.91 | 5.54 | 8.74 |
| 3″ | 88.9 | 5.49 | 7.62 | 11.13 |
| 4″ | 114.3 | 6.02 | 8.56 | 13.49 |
| 6″ | 168.3 | 7.11 | 10.97 | 18.26 |
| 8″ | 219.1 | 8.18 | 12.70 | 23.01 |
| 10″ | 273.0 | 9.27 | 15.09 | 28.58 |
| 12″ | 323.9 | 9.53 | 17.48 | 33.32 |
| 16″ | 406.4 | 12.70 | 23.01 | 41.28 |
Seamless LTCS Pipes — ASTM A333 Grade 6
| Type | INR/kg | USD/kg |
|---|---|---|
| A333 Gr 6 SCH 40 | ₹ 125 – ₹ 165 | $1.65 – $2.20 |
| A333 Gr 6 SCH 80 | ₹ 135 – ₹ 175 | $1.80 – $2.35 |
| A333 Gr 6 SCH 160 / XXS | ₹ 145 – ₹ 190 | $1.95 – $2.50 |
✔ 730419 — LTCS Seamless Pipes (A333 Gr 6)
✔ 730439 — Alternative for certain OD ranges
A333 Grade 6 requires strict low-temperature testing & certification.
Mechanical Tests
Non-Destructive Tests (NDT)
Pressure Tests
Chemical Analysis
Documentation Supplied
A333 Gr 6 pipes are usually procured along with:
| Component | Material Standard |
|---|---|
| Flanges | A350 LF2 (LTCS) |
| Fittings | A420 WPL6 (LTCS) |
| Valves | A352 LCB / LCC |
| Bends | LTCS Matching Spec |
Inox Steel India supplies all LTCS components as a package for EPC projects.
A333 Grade 6 is a mission-critical material for low-temperature and cryogenic applications. These pipelines operate under sub-zero conditions where ordinary carbon steel becomes brittle.
Inox Steel India supplies fully impact-tested, certified, and traceable LTCS pipes with strict adherence to −45°C Charpy test requirements.
Top Advantages of Choosing Inox Steel India
❄️ LNG & LPG Plants
🏭 Refinery & Petrochemical
🏔 Cold Climate Operations
Used in regions like:
🧪 Gas Processing Plants
🧬 Chemical & Fertilizer
Inox Steel India is a preferred LTCS partner for EPC contractors, Oil & Gas majors, cryogenic plants, and refinery shutdown teams.
To ensure pipe integrity during long-distance transport:
✔ Export Packaging Includes:
🌍 Major Export Countries
UAE • Saudi Arabia • Oman • Qatar • Kuwait • Bahrain
Singapore • Indonesia • Malaysia • Thailand
Kenya • Nigeria • South Africa • Egypt
Poland • Italy • Spain • Netherlands • UK
If you’re looking for a reliable LTCS (Low-Temperature Carbon Steel) pipe supplier near Alankar Cinema, Mumbai, Inox Steel India provides:
Trusted by leading refineries, gas processing plants & EPC contractors.
We help with:
✔ LTCS material selection
✔ Impact test requirements
✔ BOQ preparation
✔ EPC technical documentation
✔ Shutdown project supply
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in, steel@inoxsteelindia.in
+91 9930796690
Charpy V-Notch impact test at −45°C is mandatory for every heat.
Yes — it is the standard material for LNG & LPG plant lines.
Yes — SGS, TUV, BV, DNV & Lloyds approved inspections can be arranged.
−45°C to +350°C.
Yes — to GCC, Europe, Africa, Southeast Asia & USA.
Inox Steel India supplies impact-tested, fully certified, high-quality A333 Grade 6 LTCS pipes for LNG, LPG, refinery, petrochemical & cold-region applications.