ASTM A285 Grade B|A285 Gr.B|A285GrB STEEL PLATE

ASTM A285 Grade B Pressure Vessel Plate supplier

In the essential field of pressure vessel and boiler fabrication, choosing cost-effective materials with reliable performance is key for low- to intermediate-pressure applications in industries like oil refining, chemical processing, and power generation.

At Gangsteel, we are a premier producer and exporter of carbon steel plates, specializing in ASTM A285 Grade B (A285 Gr B), a low-carbon steel under the ASTM A285/A285M steel plate standard.

This grade is designed for fusion-welded vessels at ambient temperatures, offering good ductility and moderate strength.

Gangsteel ensures our plates meet ASTM requirements for global delivery.

If comparing, consider our ASTM A 285 Grade A for lower tensile or ASTM A 285 Grade C for higher strength needs.

ASTM A285 Grade B Pressure Vessel Plate

ASTM A285 Grade B pressure vessel plate is a carbon steel specification for low- and intermediate-tensile strength plates used in fusion-welded boilers and pressure vessels.

It is supplied in as-rolled condition, with options for normalization to improve uniformity.

Known for its affordability and formability, A285 Grade B is suitable for services where moderate strength suffices but good impact resistance is needed.

The standard controls carbon to enhance weldability, making it ideal for vessels handling non-corrosive media at pressures up to 8 bar and temperatures up to 400°C.

At Gangsteel, we produce ASTM A 285 Grade B plates for applications like storage tanks, low-pressure boilers, and heat exchangers, ensuring compliance with ASME Section VIII for diverse markets.

Compared to higher grades, it provides economic benefits in non-critical setups, with astm a 285 grade equivalent material often including EN P265GH for similar uses.

Chemical Composition of ASTM A285 Grade B

The chemical makeup of ASTM A285 Grade B prioritizes low carbon for superior weldability and controlled manganese for basic strength without alloy costs.

In astm a285 grade b boiler steel chemical composition details, phosphorus and sulfur are limited to avoid embrittlement during service.

No additional deoxidants are required, keeping the formulation simple and production economical.

Composition table (heat analysis):

This straightforward composition, with no silicon specified, aligns with equivalents like ASTM A 285 Grade equivalent material in P265GH, which has comparable low-carbon limits for pressure equipment.

Mechanical Properties of ASTM A285 Grade B

ASTM A285 Grade B provides moderate mechanical properties tailored for low-pressure vessels, with good elongation for easy forming.

Per a 285 gr b mechanical properties and density guide, it offers consistent tensile for ambient services.

Properties table:

No mandatory impact testing, but Gangsteel provides optional Charpy for enhanced assurance. Density is 7.85 g/cm³, typical for carbon steels.

Density and Delivery Condition

As noted in a 285 gr b mechanical properties and density guide, density is 7.85 g/cm³ (7850 kg/m³), supporting precise engineering calculations.

Plates are delivered as-rolled, with Gangsteel offering normalization or stress relieving to minimize residual stresses post-welding.

We include ultrasonic testing for quality, ensuring defect-free plates ready for fabrication.

Available Specifications and Models

Gangsteel supplies ASTM A285 Grade B in thicknesses from 6mm to 50mm (limited for this low-strength grade), widths up to 3500mm, and lengths to 18000mm.

Compliant with ASTM A285/A285M, we provide custom beveling and cuts.

For varying strengths, compare with ASTM A 285 Grade A or C.

Pricing Insights for ASTM A285 Grade B

As of September 29, 2025, current pricing for astm a285 grade b pressure vessel plates ranges $500-1,000 per metric ton globally, with Indian prices at ₹70-110 per kg ($0.85-1.30/kg) due to local availability.

Standard 20-30mm plates average $550-750/ton in Asia, $800-1,000 in Europe/NA.

In India, Mumbai suppliers quote ₹80-100 per kg for ex-stock, with imported or tested plates at ₹100-110 per kg plus 18% GST.

Gangsteel offers FOB quotes from $500/ton, landed in India ~₹70-90 per kg after duties.

Equivalent Materials for ASTM A285 Grade B

Equivalents facilitate affordable sourcing.

Key matches include EN 10028-2 P265GH (EU), DIN 17155 HII (Germany), JIS G3115 SPV315 (Japan), BS 1501 161-430A (UK), GB 713 Q275R (China), KS D 3560 SPV315 (Korea), AFNOR A42CP (France), IS 2041 R260 (India), AS 1548-430R (Australia).

These provide similar low-strength properties, per astm a 285 grade equivalent material.

Table:

Applications and Advantages in Pressure Vessel Systems

A285 Grade B is applied in low-pressure tanks, boilers, and exchangers, offering easy welding without preheating.

In India, it's favored for cost-sensitive refinery vessels.

Advantages include low cost over alloy steels and good formability in mild conditions.

Frequently Asked Questions (FAQs) About ASTM A285 Grade B Pressure Vessel Plate

What is ASTM A285 Grade B material?

ASTM A285 Grade B is a low-carbon steel plate for low- and intermediate-pressure vessels, with tensile 50-70 ksi and yield 27 ksi min. It's as-rolled or normalized for ductility and weldability in ambient services.

What is the difference between A285 Grade B and Grade C?

Grade B has tensile 50-70 ksi and yield 27 ksi, while Grade C (55-75 ksi tensile, 30 ksi yield) suits slightly higher pressures. Both are low-carbon, but Grade B is for lower-strength needs.

What applications suit A285 Grade B plates?

A285 Grade B fits low-pressure boilers, storage tanks, and heat exchangers in chemicals and power, handling non-corrosive fluids at moderate temps.

Is A285 Grade B equivalent to SA285 Grade B?

Yes, ASTM A285 Grade B is equivalent to ASME SA285 Grade B, with identical composition (carbon 0.22% max) and properties for ASME code use.

What thickness ranges for A285 Grade B plates?

Typically 6-50mm, as it's low-strength; Gangsteel offers widths to 3500mm and lengths to 18000mm with custom cuts.

Does A285 Grade B require impact testing?

No standard requirement, but optional Charpy for low-temp; suitable for ambient without it.

Can A285 Grade B be used in sour service?

Not recommended without testing, as it's basic carbon steel; for sour, opt for HIC-tested or higher grades like A516.

In summary, ASTM A285 Grade B from Gangsteel is an economical choice for low-pressure vessels, with reliable supply and customization. Contact us for quotes on ASTM A 285 Grade B.

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