A387 Grade 22 Class 1 pressure vessel steel

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A387 Grade 22 Class 1 pressure vessel steel Description

A387 Grade 22 Class 1 pressure vessel steel. Check the complete grade, product form, applicable edition and ordered dimensions.

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A387 Grade 22 Class 1 steel adheres to the ASTM A387/A387M specification, which outlines requirements for chromium-molybdenum steel plates used in pressure vessels and boilers. A387 Grade 22 Class 1 is a high-performance chromium-molybdenum alloy steel designed specifically for pressure vessels operating under elevated temperatures and high-pressure conditions. A387 Grade 22 Class 1 offers good weldability and formability, making it ideal for fabricating complex pressure vessel components.

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ASTM A387 Grade 22 Class 1 pressure vessel steel is widely used in industries such as oil and gas, petrochemical, and power generation. It is ideal for constructing pressure vessels, boilers, and heat exchangers that operate at temperatures up to 600°C. Common applications include refinery reactors, gas storage vessels, and steam drums. Its ability to resist hydrogen embrittlement and thermal fatigue makes it a preferred choice for critical components in harsh environments. The steel’s versatility also extends to welded structures in chemical processing plants.

A387 Grade 22 Class 1 pressure vessel steel Datasheet

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A387 Grade 22 Class 1 high-temperature steel is available primarily as steel plates, with thicknesses typically ranging from 6 mm to 150 mm, though custom thicknesses may be produced based on project requirements. Plate widths generally span 1500 mm to 4000 mm, and lengths can extend up to 12000 mm, accommodating diverse vessel designs. The steel can be supplied in normalized and tempered conditions to optimize its mechanical properties.

A387 Grade 22 Class 1 pressure vessel steel Chemical composition

The chemical composition of A387 Grade 22 Class 1 is carefully controlled to ensure its performance under high-temperature and high-pressure conditions.

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Legacy technical table
Element	Composition (% by weight)
Carbon (C)	0.05 - 0.15
Manganese (Mn)	0.30 - 0.60
Phosphorus (P)	≤ 0.035
Sulfur (S)	≤ 0.035
Silicon (Si)	0.15 - 0.40
Chromium (Cr)	2.00 - 2.50
Molybdenum (Mo)	0.90 - 1.10

This composition ensures a balance of strength, toughness, and resistance to thermal degradation.

A387 Grade 22 Class 1 pressure vessel steel Mechanical Properties

The mechanical properties of A387 Grade 22 Class 1 make it suitable for pressure vessel applications requiring reliability at elevated temperatures.

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Legacy technical table
Property	Value
Tensile Strength (MPa)	415 - 585
Yield Strength (MPa)	≥ 205
Elongation (% in 50 mm)	≥ 18
Reduction of Area (%)	≥ 45
Hardness (HB, max)	≤ 200 (normalized)

These properties ensure the steel can withstand significant mechanical stress while maintaining ductility.

Equivalent Grade of A387 Grade 22 Class 1 pressure vessel steel

A387 Grade 22 Class 1 has equivalents in other international standards, allowing for flexibility in global sourcing. The table below lists common equivalent grades:

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Legacy technical table
Standard	Equivalent Grade
EN 10028-2	10CrMo9-10
DIN	10CrMo9-10
BS	622 Gr. 31
JIS G4109	SCMV4

Source and scope

ASTM A387/A387M, ASTM steel standards catalogue · Chromium-molybdenum alloy pressure vessel plate entry. ASTM identifies A387/A387M as a chromium-molybdenum alloy steel pressure-vessel plate specification. The grade and class are both part of the order.

Apply the cited scope to the matching designation and form. Confirm any remaining technical values with the applicable edition or material certificate.

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