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Product Overview
Introduction To Engineering Steel P12
MOKSH TUBES & FITTINGS LLP is a leading manufacturer, supplier, exporter, importer, and stockist of P12 steel products including seamless and welded pipes, tubes, plates, and forgings.
EN P12, is a chromium-molybdenum alloy steel designed for high-temperature service, offering enhanced strength and corrosion resistance compared to P11 steel. It is commonly used in boilers, superheaters, and pressure vessels operating up to 565°C (1050°F). P12 provides improved creep resistance and toughness, making it suitable for more demanding thermal and mechanical conditions.
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Alloy Steel P12 Specifications
| Category | Details |
|---|---|
| Grade | ASTM A335 / ASME SA335 Grade P12 |
| Type | High-Temperature Chromium-Molybdenum Alloy Steel |
| Typical Chemical Composition | C 0.05–0.15%, Mn 0.30–0.60%, Si 0.10–0.35%, Cr 0.80–1.10%, Mo 0.40–0.60%, P ≤ 0.025%, S ≤ 0.025% |
| Conditions | Annealed, Normalized, Hot Rolled, Forged, Quenched & Tempered |
| Heat Treatment | Normalizing, Quenching & Tempering, Stress Relieving |
| Testing | Tensile, Hardness, Chemical, UT / NDT (on request) |
| Certification | EN 10204 3.1 / 3.2 |
Chemical Composition of P12 Alloy Steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.07 – 0.15 |
| Manganese (Mn) | 0.30 – 0.60 |
| Silicon (Si) | 0.10 – 0.40 |
| Chromium (Cr) | 1.00 – 1.50 |
| Molybdenum (Mo) | 0.44 – 0.65 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
The balanced chromium–molybdenum chemistry of P12 ensures high strength, thermal stability, creep resistance, and oxidation control at elevated temperatures.
Physical Properties of P12 Alloy Steel
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Melting Range | 1340 – 1400 °C | 2450 – 2550 °F |
| Elastic Modulus (Tension) | 200 GPa | 29,000 ksi |
| Elastic Modulus (Torsion) | 80 GPa | 11,600 ksi |
| Poisson’s Ratio | 0.29 | — |
| Thermal Conductivity | 45 W/m·K | — |
| Specific Heat | 460 J/kg·K | — |
Heat Treatment of Alloy Steel P12
| Process | Temperature Range | Cooling Method |
|---|---|---|
| Annealing | 680 – 720 °C | Furnace cool |
| Normalizing | 900 – 950 °C | Air cool |
| Hardening / Austenitizing | 940 – 980 °C | Air or oil quench |
| Tempering | 650 – 700 °C | Air cool (double temper recommended) |
| Stress Relieving | 675 – 725 °C | Hold 1–2 hours, air cool |
Mechanical Properties of P12 Alloy Steel (Normalized & Tempered)
| Property | Annealed | Hot-Finished | Hot-Rolled |
|---|---|---|---|
| Tensile Strength (MPa) | 517–655 | 552–758 | 517–655 |
| Yield Strength (MPa) | 276–414 | 310–620 | 276–414 |
| Elongation (%) | 20–30 | 15–25 | 20–30 |
| Brinell Hardness (HB) | 140–190 | 160–220 | 140–190 |
| Rockwell Hardness | 75–85 B | 85–90 B | 75–85 B |
P12 maintains excellent creep strength, thermal stability, and oxidation resistance in long-term high-temperature service.
International Standards & Equivalent Grades of P12 Alloy Steel
| Standard | Equivalent Grade |
|---|---|
| EN | P12 |
| AISI / SAE | 1/2 Cr 1 Mo (Approx.) |
| DIN | 13CrMo44 / 13CrMo4-5 |
| JIS | SCM422H / SCM440 |
| GB | 12Cr1MoV |
Products in Engineering Steel P12
Engineering Steel P12 is typically available in:
✔
Seamless Pipes
✔
Welded Pipes (ERW & EFW)
✔
Tubes (Capillary, U-Bend)
✔
Sheets & Plates
✔
Coils & Strips
✔
Round Bars, Flat Bars, Hex Bars, Square Bars
✔
Pipe Fittings (Elbows, Tees, Reducers, Caps, Stub Ends)
✔
Flanges (Weld Neck, Slip-On, Blind, Socket Weld, Threaded)
✔
Fasteners (Bolts, Nuts, Screws, Washers, Studs)
✔
Custom Fabricated Components
Engineering Steel P12 products are produced to the following global standards:
Uses and Advantages
Higher chromium content for better oxidation and corrosion resistance than P11
Excellent strength and creep resistance at elevated temperatures
Suitable for high pressure and thermal cycling applications
Good weldability and mechanical properties
Applications of Engineering Steel P12
Engineering Steel P12 is widely used in:
Power Generation
Boiler tubes, superheater tubes, and heat exchanger tubes operating at elevated temperatures and pressures.
Petrochemical Industry
Pressure vessels, reactors, and piping systems for hot fluids and gases.
Oil & Gas Industry
High-temperature pipelines and equipment requiring good creep resistance.
Chemical Processing
Components exposed to high temperature and corrosive environments.
WHY CHOOSE US?
FAQ's
What is P12 steel used for?
P12 steel is used in high temperature and high pressure applications, including boiler tubes, superheater tubes, pressure vessels, and heat exchanger components in power generation, petrochemical, oil & gas, and chemical processing industries.
What are the key properties of P12 steel?
P12 steel offers enhanced strength, excellent creep resistance, superior oxidation and corrosion resistance, good weldability, and mechanical performance at elevated temperatures up to 565°C (1050°F).
In what forms is P12 steel available?
P12 steel is available in seamless and welded pipes, tubes, sheets, plates, bars, flanges, fasteners, and custom fabricated components to meet diverse industrial requirements.
Why is P12 steel preferred over P11 steel?
With higher chromium content, P12 steel provides better oxidation and corrosion resistance, improved creep resistance, and enhanced strength, making it suitable for more demanding high temperature and high pressure applications.
Why choose MOKSH TUBES & FITTINGS LLP for P12 steel?
We offer certified high-quality P12 steel products, extensive stock, custom sizing, technical expertise, competitive pricing, timely deliveries, and full traceability for critical alloy steel applications.
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For inquiries or quotations for P12 steel products, contact Moksh Tubes & Fittings LLP — your dependable partner for alloy steel solutions.
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