At Lakshya Steel, we are proud to be a reliable Alloy Steel Pipes Manufacturer & Supplier, providing technically superior and performance-driven piping solutions to industries around the world. With decades of metallurgical experience and a customer-first experience, we have become the partner of choice for engineers, EPC contractors, and procurement professionals in oil & gas, petrochemicals, refineries, power plants, and the list goes on.
We manufacture and supply a large array of Alloy Steel Pipes including a variety of high-pressure Alloy Steel Seamless Pipes, according to any acceptable specifications including ASTM A335 (Grades P1, P5, P9, P11, P22, P91), ASTM A213, and ASTM A519. Our Alloy Steel Pipes are suitable for being deployed in the most critical applications in the presence of hostile conditions, and properly engineered for strength, durability, and corrosion resistance.
All pipes are rigorously tested and delivered with full traceability and documentation, including:
- Mill Test Certificates (EN 10204 3.1/3.2)
- Third-party inspections by BV, TUV, SGS, or DNV
- Certifications: ISO 9001, PED, IBR, NACE compliance
Lakshya Steel aims to provide fast delivery and total customer satisfaction through ready-to-ship inventory, flexible MOQ, and customizable options like cut-to-length, bevel ends, and protective coating during the manufacturing process.
If you need small quantities for urgent shutdowns or you are ordering in bulk for larger projects, you can rely on Lakshya Steel — a name recognized for quality, accuracy, and dependability in the alloy steel space.
Alloy Steel P5 Seamless Pipes
Alloy Steel P9 Seamless Pipes
Alloy Steel P11 Seamless Pipes
Alloy Steel P12 Seamless Pipes
Alloy Steel P22 Seamless Pipes
Alloy Steel P1 Seamless Pipes
What is Alloy Steel Pipes & Tubes?
Alloy Steel Pipes find their application in scenarios that demand moderate corrosion resistance, excellent durability, and cost-effectiveness. In simple terms, alloy pipes are preferred over carbon steel pipes in areas where the latter may fall short. Alloy steels can be categorized into two classes: high alloys and low alloy steels. Low alloy steels have an alloying content below 5%, while high alloy steels range from 5% to approximately 50% alloying content. Similar to most alloys, Alloy Steel Seamless Pipes exhibit a working pressure capacity approximately 20% higher than welded pipes. Therefore, in applications requiring elevated working pressures, the use of seamless pipes is justified. Although stronger than welded pipes, seamless pipes come at a higher cost. Additionally, welded products pose a higher risk of intergranular corrosion in the heat-affected weld zone. One noticeable difference between an Alloy Steel Welded Pipe and a seamless product is the presence of a visible latitudinal seam along the length of the pipe. However, with technological advancements today, the seam on an Alloy Steel ERW Pipe can be significantly reduced through surface treatment, rendering it nearly invisible to the human eye.
What is Alloy Steel Seamless Pipes & Tubes?
Alloy Steel Seamless Pipes & Tubes are commonly employed in applications that demand moderate corrosion resistance, along with good durability and cost-effectiveness. The High Temperature Alloy Steel Boiler Pipe is typically utilized in scenarios where the ambient temperature reaches 500°C. For instance, in drilling rigs, hollow and thin-walled Alloy Steel Drill Pipes must withstand pressure differentials occurring both inside and outside these Alloy Steel Seamless Pipes. Products made of alloy steel outperform those made of carbon steel. While they are less expensive than stainless steel grades, they exhibit superior corrosion resistance compared to carbon steel pipes, albeit inferior to stainless steels.
Product Specifications – Alloy Steel Pipes
At Lakshya Steel, we manufacture our Alloy Steel Pipes to meet even the most rigorous industry specifications, guaranteeing high performance under high pressure, temperature, and corrosive conditions. Whether you’re sourcing for power plants, refineries, or petrochemical industries, our alloy steel piping solutions provide reliability and longevity.
We supply both Alloy Steel Seamless Pipes and welded variant pipes available from a variety of schedules, weights, and sizes that can be customized to meet your project needs.
| Parameter | Specification |
| Product Type | Alloy Steel Seamless Pipes / Welded Pipes |
| Manufacturing Standards | ASTM A335 / ASME SA335, ASTM A213, ASTM A519, DIN 17175, EN 10216-2 |
| Available Grades | P1, P2, P5, P9, P11, P12, P22, P91, T1, T5, T11, T22 |
| Size Range (NB) | 1/4″ NB to 36″ NB (larger sizes on request) |
| Wall Thickness | SCH 10 to SCH XXS / Custom Schedules |
| Length | Single Random (SRL), Double Random (DRL), or Custom Cut Lengths (up to 12m) |
| Pipe Ends | Plain End (PE), Beveled End (BE), Threaded End (TE) |
| Surface Finish | Black, Bare, Polished, Anti-Rust Oil Coated, Galvanized (on request) |
| Manufacturing Process | Hot Finished, Cold Drawn, Normalized, Quenched & Tempered (Q&T) |
| Dimensional Tolerances | As per ASTM / ASME / EN standards or project-specific requirements |
| NDT Testing Options | Ultrasonic Testing, Eddy Current, Hydrostatic Testing, Radiographic Testing |
Material Details – Alloy Chemistry & Mechanical Properties
At Lakshya Steel, we are acutely aware that the performance of Alloy Steel Pipes for use in demanding environments with extreme stress and high temperature, is heavily influenced by both the chemical composition and the mechanical properties of the alloys. We adhere to rigidly tight material specification and standards such as ASTM A335 / A213 / A519 which are internationally recognized for dependable performance suitable for critical applications such as boilers, heat exchangers, pumping of high temperature liquids in plants or petrochemical facilities.
Chemical Composition (Typical Values for ASTM A335 P11, P22, P91 Grades)
| Element | P11 (%) | P22 (%) | P91 (%) |
| Carbon (C) | 0.05 – 0.15 | 0.05 – 0.15 | 0.08 – 0.12 |
| Manganese (Mn) | 0.30 – 0.60 | 0.30 – 0.60 | 0.30 – 0.60 |
| Phosphorus (P) | ≤ 0.025 | ≤ 0.025 | ≤ 0.020 |
| Sulfur (S) | ≤ 0.025 | ≤ 0.025 | ≤ 0.010 |
| Chromium (Cr) | 1.00 – 1.50 | 1.90 – 2.60 | 8.00 – 9.50 |
| Molybdenum (Mo) | 0.44 – 0.65 | 0.87 – 1.13 | 0.85 – 1.05 |
| Nickel (Ni) | — | — | ≤ 0.40 |
| Vanadium (V) | — | — | 0.18 – 0.25 |
| Nitrogen (N) | — | — | ≤ 0.030 |
Mechanical Properties (As per ASTM A335 Standard)
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HBW) |
| P11 | ≥ 415 | ≥ 205 | ≥ 30 | ≤ 163 |
| P22 | ≥ 415 | ≥ 205 | ≥ 30 | ≤ 163 |
| P91 | ≥ 585 | ≥ 415 | ≥ 20 | ≤ 250 |
Tolerance of ASME SA335 Alloy Pipe:
| ASTM A450 | Hot rolled | Outside Diameter, mm | Tolerance, mm |
| OD≤101.6 | +0.4/-0.8 | ||
| 101.6＜OD≤190.5 | +0.4/-1.2 | ||
| 190.5＜OD≤228.6 | +0.4/-1.6 | ||
| Cold Drawn | Outside Diameter, mm | Tolerance, mm | |
| OD＜25.4 | ±0.10 | ||
| 25.4≤OD≤38.1 | ±0.15 | ||
| 38.1＜OD＜50.8 | ±0.20 | ||
| 50.8≤OD＜63.5 | ±0.25 | ||
| 63.5≤OD＜76.2 | ±0.30 | ||
| 76.2≤OD≤101.6 | ±0.38 | ||
| 101.6＜OD≤190.5 | +0.38/-0.64 | ||
| 190.5＜OD≤228.6 | +0.38/-1.14 | ||
| ASTM A530 & ASTM A335 | NPS | Outside Diameter, inch | Tolerance, mm |
| 1/8≤OD≤1-1/2 | ±0.40 | ||
| 1-1/2＜OD≤4 | ±0.79 | ||
| 4＜OD≤8 | +1.59/-0.79 | ||
| 8＜OD≤12 | +2.38/-0.79 | ||
| OD>12 | ±1% |
ASME SA335 Alloy Steel Custom Pipes Wall thickness:
| STM A450 | Hot rolled | Outside Diameter, mm | Tolerance, % |
| OD≤101.6, WT≤2.4 | +40/-0 | ||
| OD≤101.6, 2.4＜WT≤3.8 | +35/-0 | ||
| OD≤101.6, 3.8＜WT≤4.6 | +33/-0 | ||
| OD≤101.6, WT>4.6 | +28/-0 | ||
| OD>101.6, 2.4＜WT≤3.8 | +35/-0 | ||
| OD>101.6, 3.8＜WT≤4.6 | +33/-0 | ||
| OD>101.6, WT>4.6 | +28/-0 | ||
| Cold Drawn | Outside Diameter, mm | Tolerance, % | |
| OD≤38.1 | +20/-0 | ||
| OD>38.1 | +22/-0 | ||
| ASTM A530 | NPS | Outside Diameter, inch | Tolerance, % |
| 1/8≤OD≤2-1/2 | +20.0/-12.5 | ||
| 3≤OD≤18, WT/OD≤5% | +22.5/-12.5 | ||
| 3≤OD≤18, WT/OD>5% | +15.0/-12.5 | ||
| OD≥20, WT/OD≤5% | +22.5/-12.5 | ||
| OD≥20, WT/OD>5% | +15.0/-12.5 |
Alloy Steel Pipes Heat Treatment:
| P5, P9, P11, and P22 | |||
| Grade | Heat Treatment Type | Normalizing Temperature Range F [C] | Subcritical Annealing or Tempering Temperature Range F [C] |
| P5 (b,c) | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| Subcritical Anneal (P5c only) | ***** | 1325 – 1375 [715 – 745] | |
| P9 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| P11 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1200 [650] | |
| P22 | Full or Isothermal Anneal | ||
| Normalize and Temper | ***** | 1250 [675] | |
| P91 | Normalize and Temper | 1900-1975 [1040 – 1080] | 1350-1470 [730 – 800] |
| Quench and Temper | 1900-1975 [1040 – 1080] | 1350-1470 [730 – 800] |
Certifications & Quality Assurance – Alloy Steel Pipes
Quality Certifications You Can Trust
Key Certifications & Standards
- Mill Test Certificate (MTC): EN 10204 3.1 / 3.2
- ISO Certified:
- ISO 9001:2015 (Quality)
- ISO 14001:2015 (Environment)
- ISO 45001:2018 (Health & Safety)
- Regulatory Approvals:
- IBR, PED 2014/68/EU, CE Marking
- NACE MR0175 / MR0103 (Sour service)
- Standards Compliance: ASTM, ASME, DIN, EN as per order
Third-Party Inspections
By agencies like BV, SGS, TÜV, LR, DNV, ABS, Intertek, and more on request.
Quality Testing
Our Commitment to Excellence
Applications & Industries Served – Alloy Steel Pipes
We supply industries where failure of materials is not an option — providing solutions that are trusted with an emphasis on quality, certification, and global reach.
Common Applications of Alloy Steel Pipes
| Application Area | Purpose |
| Boilers & Superheaters | Withstand high steam pressure and temperature in power plants |
| Heat Exchangers | Efficient thermal transfer in petrochemical, oil & gas, and power sectors |
| Refineries & Petrochemicals | Transport of hydrocarbons and corrosive fluids under high pressure |
| Power Generation | Steam lines, condensers, and reheaters in thermal and nuclear plants |
| Pressure Vessels | Structural support in critical, high-pressure systems |
| Oil & Gas Transmission | Onshore and offshore pipelines, risers, flowlines |
| Fertilizer Plants | Piping systems for process gases and aggressive chemicals |
| Automotive & Aerospace | Precision tubing and structural components requiring high tensile strength |
| Structural Applications | Support systems, frameworks, and mechanical structures under heavy loads |
Product Availability & Delivery – Alloy Steel Pipes
Whether you require urgent maintenance in small numbers, or you need large quantities for extensive industrial projects, we have the capacity to deliver in a prompt and timely manner.
In-Stock Availability
- Standards: ASTM A335, A213, A519, A691 / ASME SA series / EN & DIN equivalents
- Grades: P1, P5, P9, P11, P22, P91, T11, T22, 4130, 4140, and more
- Sizes:
- Outer Diameter: 1/2″ to 24″ (12.7mm – 610mm)
- Wall Thickness: SCH 40 to SCH 160, XXS
- Lengths: Single Random, Double Random, or Custom Cut Lengths
- Types: Seamless, ERW, Welded, Hot Finished, Cold Drawn
Alloy Steel Pipes Price Per KG in India
Indicative Price Range – May 2025
| Product Type | Grade | Size Range | Price per KG (INR) |
| Alloy Steel Seamless Pipes | ASTM A335 P11 | 1/2″ to 6″ | ₹130 – ₹170 |
| Alloy Steel Seamless Pipes | ASTM A335 P22 | 1″ to 10″ | ₹145 – ₹185 |
| Alloy Steel Seamless Pipes | ASTM A335 P91 | 2″ to 12″ | ₹260 – ₹320 |
| Alloy Steel Welded Pipes | ASTM A691 5Cr | 4″ to 24″ | ₹120 – ₹160 |
| Chrome Moly Pipes | 4130 / 4140 | As per requirement | ₹180 – ₹240 |
Why Choose Lakshya Steel for Alloy Steel Pipes?
Here are why engineers, EPC contractors, and purchasing professionals around the world have chosen Lakshya Steel as their preferred partner for alloy steel:
- Proven Industry Expertise
Backed by decades of experience, we deliver tailored alloy steel piping solutions for critical sectors like power, oil & gas, petrochemicals, and infrastructure. - Wide Range of Alloy Steel Pipes
We supply seamless and welded pipes in grades like ASTM A335 (P1–P91), A213, A519, A691, 4130, 4140, and global equivalents—available in various sizes and finishes. - Strict Quality Assurance
Certified to ISO 9001, 14001, OHSAS 18001, with MTCs (EN 10204 3.1/3.2), third-party inspections (SGS, TUV, BV), and approvals like IBR, PED, and NACE. - Ready Stock & Fast Delivery
Large inventory for immediate dispatch, custom cuts on request, and global shipping via air, sea, or land—ensuring on-time delivery. - Competitive & Flexible Pricing
Affordable rates, bulk discounts, flexible payment terms, and fast quotations—designed for long-term partnerships. - Global Client Trust
Supplying to top projects across India, UAE, USA, Europe, Africa, and more—with strong client retention and repeat business.