What welding rod for ASTM A387 Grade 22 Class 1?

What welding rod for ASTM A387 Grade 22 Class 1?

For ASTM A387 Grade 22 Class 1 (2.25Cr-1Mo steel), you need low-alloy consumables matching the base metal's composition, typically an E9016-B3 (SMAW), ER90S-G (GTAW/TIG), F9P2-EG-B3 (SAW flux/wire), or similar B3 classified electrodes/wires, ensuring proper preheat and post-weld heat treatment (PWHT) to prevent cracking and temper embrittlement.

ASTM A387 Grade 22 Class 1 is a chromium-molybdenum (Cr-Mo) alloy steel plate containing approximately 2.25% Chromium and 1.00% Molybdenum. It is a cornerstone material in the global energy and petrochemical infrastructure, serving as the backbone for critical high-temperature equipment such as hydrocracking units and catalytic reformers.

Key Characteristics:

Material: Chromoly (Chromium-Molybdenum) Alloy Steel.

Standard: ASTM A387/A387M for pressure vessel plates.

Performance: Excellent resistance to corrosion, oxidation, and high temperatures, suitable for sour (H2S) gas environments.

Applications: Welded boilers, pressure vessels, heat exchangers, and power generation equipment.

What precautions should be taken when welding ASTM A387 Grade 22 Class 1 ?

When welding ASTM A387 Grade 22 Class 1, key precautions involve thorough surface cleaning, implementing preheating and post-weld heat treatment (PWHT) to prevent cracking (especially stress relief at ~690°C), using low-hydrogen consumables, ensuring proper ventilation, and wearing full Personal Protective Equipment (PPE) like a helmet, gloves, and flame-retardant clothing to manage risks from fumes, radiation, and spatter. This low-alloy Cr-Mo steel is prone to cold cracking due to its hardenability, necessitating careful control of heat input and residual stress.

What is ASTM A387 Grade 22 Class 1 high speed steel?

ASTM A387 Grade 22 Class 1 is a chromium-molybdenum alloy steel plate designed for high-temperature pressure vessels and boilers, offering good corrosion resistance, with specific mechanical properties like lower yield/tensile strength than Class 2, and requiring normalization

What is the hardness of ASTM A387 Grade 22 Class 1 ?

ASTM A387 Grade 22 Class 1 steel typically has a Brinell hardness of around 190 HBW, though specific hardness can vary slightly with heat treatment, but it's usually within a range corresponding to its tensile properties, with common values around 415-585 MPa tensile strength and minimum yield strength around 205-240 MPa.

Plate Specification :

Equivalents for ASTM A387 Grade 22 Alloy Steel Plates

Specifications for ASTM A387 Grade 22 Alloy Steel Plates

ASTM A387 GR 22 CLASS 1

1What welding rod for ASTM A387 Grade 22 Class 1?

For welding ASTM A387 Grade 22 Class 1 (2.25Cr-1Mo steel), you typically use matching low-alloy steel consumables like E/ER70S-2 for GTAW/SMAW or E7018 for SMAW, often with preheat and post-weld heat treatment (PWHT) to prevent cracking, but for demanding applications, nickel-based electrodes (like ENiCrMo-3/ERNiCrMo-3) are used to avoid carbide formation and carbon migration,  Key considerations are the 2.25% Cr and 1% Mo content, requiring filler metals that match or exceed these elements for service at elevated temperatures, often requiring PWHT, and potentially nickel-based fillers for dissimilar joints or to mitigate issues like temper embrittlement,

2What is ASTM A387 Grade 22 Class 1 material ?

ASTM A387 Grade 22 Class 1 is a chromium-molybdenum alloy steel plate designed for welded

boilers and high-temperature pressure vessels, featuring around 2.25% Chromium and 1% Molybdenum, offering good strength and corrosion resistance, with Class 1 indicating a specific, lower tensile strength range compared to Class 2.

3What are the typical application fields of ASTM A387 Grade 22 Class 1 ?

ASTM A387 Grade 22 Class 1 is a chrome-moly alloy steel primarily used for high-temperature pressure vessels, boilers, and heat exchangers, serving the oil, gas, petrochemical, and power generation industries due to its excellent resistance to heat, oxidation, and corrosion, especially in demanding environments like refineries. It's ideal for components such as flanges, ducting, and pressure vessels operating under elevated temperatures, with a working range up to about 600°C (1100°F).

4What is the composition of ASTM A387 Grade 22 Class 1 ?

ASTM A387 Grade 22 Class 1 is a chromium-molybdenum alloy steel for pressure vessels, primarily containing around 2.25% Chromium (Cr) and 1.00% Molybdenum (Mo), with specified limits for Carbon (C), Manganese (Mn), Phosphorus (P), Sulfur (S), and Silicon (Si) to ensure high-temperature strength and corrosion resistance, particularly suitable for welded boiler and pressure vessel service.

5Is ASTM A387 Grade 22 Class 1 carbon steel?

No, ASTM A387 Grade 22 Class 1 is not plain carbon steel; it's a chromium-molybdenum (Cr-Mo) alloy steel, specifically designed as a pressure vessel plate for elevated temperature service, offering better heat resistance and corrosion properties than standard carbon steels due to its ~2.25% Chromium and ~1.00% Molybdenum content. While it's related to carbon steel (as it's a steel), the added alloying elements classify it as an alloy steel for high-temperature, high-pressure applications in industries like oil, gas, and petrochemicals, unlike basic carbon steels

6What is ASTM A387 Grade 22 Class 1 equivalent to?

ASTM A387 Grade 22 Class 1 is equivalent to ASME SA387 Grade 22 Class 1, and internationally to standards like EN 10 CRMO 9-10, DIN 10CrMo9-10, and BS 622-515B, all specifying a 2.25% Chromium, 1% Molybdenum alloy steel for high-temperature pressure vessels, with Class 1 indicating lower tensile strength than Class 2.

7What temperature is ASTM A387 Grade 22 Class 1 ?

ASTM A387 Grade 22 Class 1 is designed for high-temperature service, with its minimum tempering temperature being 1250°F (675°C), and it performs well in applications up to around 600°C (1112°F), offering excellent strength and corrosion resistance in elevated temperature environments like boilers and pressure vessels.

8What precautions should be taken when welding ASTM A387 Grade 22 Class 1 ?

When welding ASTM A387 Grade 22 Class 1, key precautions involve thorough surface cleaning, implementing preheating and post-weld heat treatment (PWHT) to prevent cracking (especially stress relief at ~690°C), using low-hydrogen consumables, ensuring proper ventilation, and wearing full Personal Protective Equipment (PPE) like a helmet, gloves, and flame-retardant clothing to manage risks from fumes, radiation, and spatter. This low-alloy Cr-Mo steel is prone to cold cracking due to its hardenability, necessitating careful control of heat input and residual stress.

9What is ASTM A387 Grade 22 Class 1 high speed steel?

ASTM A387 Grade 22 Class 1 is a chromium-molybdenum alloy steel plate designed for high-temperature pressure vessels and boilers, offering good corrosion resistance, with specific mechanical properties like lower yield/tensile strength than Class 2, and requiring normalization

10What is the hardness of ASTM A387 Grade 22 Class 1 ?

ASTM A387 Grade 22 Class 1 steel typically has a Brinell hardness of around 190 HBW, though specific hardness can vary slightly with heat treatment, but it's usually within a range corresponding to its tensile properties, with common values around 415-585 MPa tensile strength and minimum yield strength around 205-240 MPa.

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