SA 387 Grade 22 Class 1 is a chromium-molybdenum (Cr-Mo) alloy steel plate specified in the ASME SA-387/SA-387M standard, engineered for welded pressure vessels and high-temperature service equipment.
Its low-carbon alloy formulation delivers excellent high-temperature creep resistance, oxidation resistance and weldability. The Class 1 designation requires mandatory ultrasonic testing to eliminate internal defects, guaranteeing structural integrity for critical applications.
It is extensively used across oil and gas, petrochemical and power generation industries to fabricate key components like boilers, reactors, heat exchangers and piping that operate under prolonged high-heat and high-pressure conditions.
Chemical Composition( %):
|
Grade/ Material |
Element |
Composition( Max-A, Min-I) |
|
SA387 Grade 22 Class 1
|
C |
0.05-0.15 |
|
Mn |
0.30-0.60 |
|
|
Si |
A:0.50 |
|
|
P |
0.035 |
|
|
S |
0.035 |
Mechanical Properties( Mpa)
|
Grade/ Material |
Tensile Test |
Ksi/MPa |
|
SA387 Grade 22 Class 1
|
Tensile Strength |
60-85/415-585 |
|
Yield Strengh |
30/205 |
|
|
Elongation |
18% |
|
|
Impact Test( if any) |
Applications
Pressure Vessels
Engineered for containing high-temperature, high-pressure gases and liquids, delivering reliable structural integrity in critical industrial scenarios.
Boilers
Applied in power plants and heavy industrial settings to withstand extreme thermal stress during steam generation and heat transfer processes.
Heat Exchangers
Deployed in petrochemical refining and chemical processing operations, ensuring efficient heat exchange while resisting corrosive and high-temperature media.
Storage Tanks
Designed for elevated-temperature storage of volatile or reactive fluids, withstanding long-term thermal load and media erosion.
Oil & Gas
Ideal for sour gas handling systems and general petrochemical equipment, offering robust resistance to sulfide stress cracking and harsh operating conditions.
Power Generation
Used to fabricate core components in thermal power plants and gas turbines, enduring continuous high-heat, high-pressure operating regimes.
Advantages
High Temperature Resistance: Maintains strength and stability in elevated temperatures, up to around 600°C (1100°F).
Corrosion & Oxidation Resistance: Chromium content provides superior resistance, crucial for harsh environments.
Strength & Durability: Molybdenum enhances tensile strength and hardness, ensuring longevity.
Weldability: Good weldability allows for effective fabrication and repair.
Cost-Effective: Long-term savings through reduced maintenance and extended service life.
Versatility: Suitable for diverse applications requiring both strength and resistance to heat/corrosion.
If you have project requirements for SA 387 Grade 22 Class 1, we welcome your inquiry. GNEE maintains a large inventory of commonly used high strength steel grades for your selection.For detailed mechanical properties, chemical composition, and technical data, as well as free samples, please contact our factory immediately. We offer competitive prices, stable quality, and professional service. Email:beam@gneesteelgroup.com.
1.What is SA 387 Grade 22 Class 1 equivalent to?
SA 387 Grade 22 Class 1 is equivalent to ASTM A387 Grade 22 Class 1, with common international equivalents being EN 10CrMo9-10 and DIN 10CrMo9-10, all signifying a 2.25% Chromium-1% Molybdenum alloy steel for high-temperature pressure vessel service, though Class 1 has lower tensile strength requirements than Class 2.
2.What is the price of SA 387 Grade 22 Class 1?
The price of SA 387 Grade 22 Class 1 alloy steel plate varies significantly by supplier, quantity, thickness, and market conditions, but generally ranges from $600 to over $3,000 USD per ton (or around $100-$500+ per kg), with specific quotes showing prices like $700-$800/ton or ₹210-225/kg, often listed with Class 2 material, so direct inquiry with suppliers for exact pricing is best.