ASTM A387 Grade 5 Class 1 is a chromium-molybdenum alloy steel plate compliant with industry standards, engineered for high-temperature and high-pressure service. Optimized via heat treatment, it offers excellent toughness, formability and weldability. The chromium-molybdenum synergy delivers strong heat, corrosion and creep resistance, suiting it for critical equipment like boilers, pressure vessels and heat exchangers in oil and gas, petrochemical and power generation sectors.
Chemical Requirements for ASTM A387 Grade 5 Alloy Steel Plates
| Element | Chemical Composition (%) | |
| A 387 Grade 5 | ||
| Carbon: | Heat Analysis: | 0.15 max |
| Product Analysis: | 0.15 max | |
| Manganese: | Heat Analysis: | 0.30 - 0.60 |
| Product Analysis: | 0.25 - 0.66 | |
| Phosphorus: | Heat Analysis: | 0.035 |
| Product Analysis: | 0.035 | |
| Sulphur (max): | Heat Analysis: | 0.030 |
| Product Analysis: | 0.030 | |
| Silicon: | Heat Analysis: | 0.50 max |
| Product Analysis: | 0.55 max | |
| Chromium: | Heat Analysis: | 4.00 - 6.00 |
| Product Analysis: | 3.90 - 6.10 | |
| Molybdenum: | Heat Analysis: | 0.45 - 0.65 |
| Product Analysis: | 0.40 - 0.70 |
Tensile Requirements for ASTM A387 Grade 5 Alloy Steel Plates Class 1 Plates
| Designation: | Requirement: | Grade 5 |
|
A387 Grade 5 |
Tensile strength, ksi [MPA] | 75 to 100 [515 to 690] |
| Yield strength, min, ksi [MPa]/(0.2% offset) | 45 [310] | |
| Elongation in 8 in. [200mm], min % | ... | |
| Elongation in 2 in. [50mm], min, % | 18 | |
| Reduction of area, min % | 45 (measured on round specimen) 40 (measured on flat specimen) |
Key Applications & Industries:
Oil & Gas: Refineries, gas processing, offshore drilling equipment, and pipelines handling hot liquids/gases.
Power Generation: Boilers, condensers, and components in power plants.
Chemical Processing: Equipment in chemical plants where high temperatures and corrosive substances are present.
Heat Exchangers: Fabrication of units requiring strength and resistance to high temperatures.
General Industrial: Manufacturing industries, cement, sugar, pulp & paper, and marine applications.
If you have project requirements for ASTM A387 Grade 5 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.
What is the ASTM A387 equivalent to?
Among the ASTM A387 Grade 22 equivalent steel grades, SA387 Grade 22, 10CrMo9-10 is more popular than other equivalents. SA387 Grade 22 steel is under ASME SA387/ SA387M standard. The chemical performance and technical requirements of SA387 Grade 22 steel is almost same with ASTM A387 Grade 22 steel.
What are the grades of ASTM steel?
ASTM steel grades are standardized designations (e.g., A36, A572, A992) set by ASTM International that classify steels by their chemical composition, mechanical properties (like strength), and intended use in construction, piping, or other applications, with common examples including versatile A36 for general structural use and stronger A572 for high-strength structural needs, all ensuring material consistency.