Technical Details Summary
-
Standard Specifications: ASTM A333 / ASME SA333 Grade 6 for low-temperature service.
-
Manufacturing Type: 100% Seamless construction (Hot-Finished or Cold-Drawn).
-
Size Range: 1/2" NB to 36" NB (19.05 mm to 114.3 mm outer diameter; 2.0 mm to 14.0 mm wall thickness).
-
Impact Testing: Charpy V-Notch (CVN) impact tested at -45°C (-50°F) as standard.
-
Certificates & Testing: Includes EN 10204 3.1 Mill Test Certificate, 100% Hydrostatic and NDT testing, and supports Third-Party Inspection (TPI).
ASTM A333 Grade 6 Seamless Pipes Overview
Trident Metal & Alloys is a premier ASTM A333 Grade 6 Seamless Pipes Manufacturer in India, supplying sub-zero seamless piping for cold-climate and cryogenic fluid transfer. This specification covers nominal wall seamless carbon steel pipe designed for low-temperature service down to -45°C (-49°F).
As a leading ASTM A333 Grade 6 Seamless Pipes Supplier in India, we supply fully certified material processed without longitudinal or circumferential weld seams. This seamless structure removes heat-affected zone vulnerabilities, providing gas processing units, refrigeration plants, and LNG terminals with maximum resistance against brittle fracture under thermal shock.
We keep ready stock of A333 Grade 6 Carbon Steel Seamless Pipes from 1/2" NB to 36" NB. All pipes come with clean factory beveling, cut-to-length processing, and anti-corrosion protection. Every order includes official EN 10204 3.1 test certificates and supports 100% Third-Party Inspection (TPI).
For ambient high-temperature steam lines and power plant utility systems, view our ASTM A106 Grade B Seamless Pipes.
Technical Specifications & Size Range
Manufacturing standards, dimensional capabilities, and end configuration options for ASTM A333 Grade 6 seamless pipes.
| Technical Parameter | Specification Limits & Manufacturing Capabilities |
|---|---|
| Standard Specifications | ASTM A333 / ASME SA333 (Grade 6), ASME B36.10M |
| Manufacturing Type | 100% Seamless (Hot-Finished or Cold-Drawn SMLS) |
| Nominal Size Range | 1/2" NB to 36" NB (Seamless Outer Diameters: 19.05 mm to 114.3 mm) |
| Wall Thickness Range | 2.0 mm to 14.0 mm (Schedules: SCH 20, SCH 40, SCH 80, SCH 160, SCH XXS) |
| Length Profiles | Single Random (SRL), Double Random (DRL), Cut Lengths up to 16,000 mm |
| Form Options | Round Pipes, Square Pipes, Rectangular Sections |
| End Profiles | Plain Ends (PE), Beveled Ends (BE at 30° for field joint welding) |
Chemical & Mechanical Properties of ASTM A333 Grade 6
Chemical Composition of ASTM A333 Gr 6
| Chemical Element | ASTM A333 Grade 6 Requirement |
|---|---|
| Carbon (C) max | 0.30% |
| Manganese (Mn) | 0.29 – 1.06% |
| Phosphorus (P) max | 0.025% |
| Sulfur (S) max | 0.025% |
| Silicon (Si) min | 0.10% min |
| Nickel (Ni) | — |
Mechanical Properties of ASTM A333 Gr 6
| Property | Minimum Requirement |
|---|---|
| Yield Strength (min) | 240 MPa (35 ksi) |
| Tensile Strength (min) | 415 MPa (60 ksi) |
| Elongation (min) | 30% |
| Charpy V-Notch Impact Test | Required at -45°C (-50°F) |
Physical Properties & Equivalent Standards
Physical Properties of A333 Grade 6 Seamless Pipe
| Physical Parameter | Value & Unit Measure |
|---|---|
| Density | 0.284 lb/cu. in. |
| Specific Gravity | 7.9 |
| Specific Heat | 0.105 Btu/lb/°F (32–212°F) |
| Melting Point | 2750°F |
| Thermal Conductivity | 360 |
| Mean Coeff. Thermal Expansion | 6.3 |
| Modulus of Elasticity Tension | 30 |
| Modulus of Elasticity Torsion | 11 |
Equivalent Standards for ASTM A333 Grade 6 Pipes
| Former Execution | Former Standard | Former Material | New Standard | New Material |
|---|---|---|---|---|
| Seamless | ASTM A333 | Grade 6 | EN 10216-4 | P265NL |
Key Advantages of A333 Grade 6 Carbon Steel Seamless Pipes
Sub-Zero Strength
Stays tough and resists cracking in extreme freezing temperatures down to -45°C (-50°F).
Cleaner Steel Composition
Strict low limits on sulfur and phosphorus (0.025% max) make the metal stronger against sudden impacts.
Easy Field Welding
Low carbon content makes it simple to weld on job sites without complicated preheating steps.
Strong Seamless Design
Built without welded seams to evenly handle internal pressure without weak points.
Industrial Applications for ASTM A333 Gr 6 Seamless Pipes
Liquefied Natural Gas (LNG) Processing
Cold transfer lines, inlet headers, and storage facility piping handling sub-zero liquefied hydrocarbons.
Low-Temperature Gas Extraction
Offshore and onshore wellhead piping operating in extreme freezing climates.
Refrigeration & Cryogenic Plants
Chiller loops, ammonia transport piping, and industrial gas separation columns.
Petrochemical Cold Units
Low-temperature fractionating towers, ethylene plant piping, and cold-service heat exchangers.
Grade Selection: ASTM A333 Grade 6 vs ASTM A106 Grade B
Comparative technical evaluation between low-temperature service (A333 Grade 6) and high-temperature service (A106 Grade B).
| Engineering Parameter | ASTM A333 Grade 6 | ASTM A106 Grade B |
|---|---|---|
| Primary Design Intent | Low-temperature and freezing service down to -45°C | High-temperature steam and heat service up to 427°C (800°F) |
| Mandatory Impact Testing | Mandatory Charpy V-Notch impact testing at -45°C | Standard CVN impact testing is not mandatory |
| Impurity Controls | Phosphorous & Sulfur max restricted to 0.025% | Phosphorous & Sulfur max allowed up to 0.035% |
| Minimum Yield Strength | 240 MPa (35,000 psi) | 240 MPa (35,000 psi) |
| Minimum Tensile Strength | 415 MPa (60,000 psi) | 415 MPa (60,000 psi) |
Regional Supply Across India
Western Region (Maharashtra & Gujarat Belts)
We supply ASTM A333 Grade 6 Carbon Steel Seamless Pipes directly to gas processing hubs, refineries, and chemical projects across Mumbai, Pune, Thane, Navi Mumbai, Ahmedabad, Surat, Vadodara, Rajkot, Hazira, and Ankleshwar.
Northern & Central Region (NCR, Punjab & MP)
Direct distribution channels for industrial refrigeration and cold-chain infrastructure across Delhi NCR, Faridabad, Gurgaon, Ghaziabad, Noida, Ludhiana, Indore, and Bhopal.
Southern Region (Tamil Nadu, Karnataka, Telangana & AP)
Regular dispatches of A333 Grade 6 Seamless Pipes to cryogenic facilities, power plants, and gas terminals in Chennai, Coimbatore, Bengaluru, Hyderabad, Visakhapatnam, and Tiruchirappalli.
Eastern Region (West Bengal, Odisha, Jharkhand & Chhattisgarh)
Bulk supply of low-temperature seamless pipe for gas grids and heavy chemical plants in Kolkata, Durgapur, Rourkela, Jamshedpur, Bhilai, and Paradip.
Quality Verification & Material Documentation
Trident Metal & Alloys subjects all ASTM A333 Grade 6 Seamless Pipes to rigorous destructive and non-destructive quality checks prior to project dispatch.
Mill Test Certificates (MTC)
Fully compliant EN 10204 3.1 MTCs containing heat analysis, tensile curves, freezing impact test logs, and hydrostatic pressure reports.
Third-Party Verification
Open to 100% inspection by TUV, SGS, Bureau Veritas, DNV, or Lloyds to meet global project criteria.
Non-Destructive Testing
All seamless pipes undergo 100% full-body ultrasonic or electromagnetic inspection to guarantee zero structural defects.
All dispatches comply with dimensional tolerances established across our broader Carbon Steel Seamless Pipe Product Ranges.
Frequently Asked Questions
Q: What is an ASTM A333 Grade 6 Seamless Pipe used for?
A: It is designed for low-temperature and freezing environments down to -45°C (-50°F), such as LNG lines, cold chemical plants, and refrigeration systems.
Q: How does ASTM A333 Grade 6 differ from ASTM A106 Grade B?
A: A333 Grade 6 requires mandatory impact testing at -45°C and lower impurity levels, while A106 Grade B is made for high-heat utility lines.
Q: What heat treatment is applied to A333 Grade 6 Carbon Steel Seamless Pipes?
A: The pipes are heat treated (typically normalized) to achieve a uniform fine-grained micro-structure necessary for low-temperature impact toughness.
Q: What size range is available for A333 Grade 6 Seamless Pipes?
A: Standard sizes range from 1/2" NB up to 36" NB, with wall thicknesses between 2.0 mm and 14.0 mm across standard and extra-heavy schedules.
Q: What certifications accompany the material upon delivery?
A: Every shipment includes EN 10204 3.1 Mill Test Certificates detailing heat analysis, physical/mechanical test reports, sub-zero CVN impact logs, and NDT results.
Request a Quote
Partner with Trident Metal & Alloys for reliable stock, competitive project pricing, custom beveling, and rapid dispatch across Indian and international markets.
- Email Inquiries: tridentmetal96@yahoo.com
- Direct Phone / WhatsApp: +91 9619282829 / +91 9619966304
