ASTM A285/A285M carbon steel plate
ASTM A285/A285M carbon steel plate is a low to intermediate tensile strength steel specifically designed for pressure vessel applications. This grade features excellent welding characteristics, good formability, and reliable performance in moderate temperature service conditions, making it suitable for fusion welding, riveting, and other fabrication methods.
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◉ PRODUCT SPECIFICATION


1. Material Standards & Grades


Primary Standard:

ASTM A285/A285M - Pressure Vessel Plates, Carbon Steel, Low- and Intermediate-Tensile Strength


Available Grades:

Grade

Minimum Yield Strength (MPa)

Minimum Tensile Strength (MPa)

Equivalent Standards

Grade A

165

310

P235GH (EN 10028-2)

Grade B

185

345

P265GH (EN 10028-2)

Grade C

205

380

P295GH (EN 10028-2)


2. Chemical Composition (% by weight)


Element

Grade A

Grade B

Grade C

Product Analysis Tolerance

Carbon (C)

≤ 0.17

≤ 0.22

≤ 0.28

+0.02%

Manganese (Mn)

≤ 0.90

≤ 0.90

≤ 0.90

+0.04%

Phosphorus (P)

≤ 0.035

≤ 0.035

≤ 0.035

+0.005%

Sulfur (S)

≤ 0.04

≤ 0.04

≤ 0.04

+0.005%

Silicon (Si)

-

-

-

+0.02%


3. Mechanical Properties


Property

Grade A

Grade B

Grade C

Test Standard

Yield Strength (MPa)

≥ 165

≥ 185

≥ 205

ASTM A370

Tensile Strength (MPa)

310-450

345-485

380-515

ASTM A370

Elongation (%)

≥ 27

≥ 25

≥ 23

ASTM A370

Hardness (HB)

≤ 121

≤ 137

≤ 156

ASTM E10


4. Physical Properties


Property

Typical Value

Test Standard

Density

7.85 g/cm³

ASTM E1266

Modulus of Elasticity

200 GPa

ASTM E111

Poisson's Ratio

0.29

-

Thermal Expansion Coefficient

11.7 × 10⁻⁶/°C

ASTM E228

Thermal Conductivity

51.9 W/m·K

ASTM E1225


5. Product Specifications


Parameter

Standard Range

Tolerance

Available Customization

Thickness

6mm - 100mm

±0.25-1.0mm

5mm - 150mm

Width

1500mm - 3000mm

±5-15mm

1000mm - 4000mm

Length

3000mm - 12000mm

+20mm/-0mm

2000mm - 18000mm

Flatness

≤ 8mm/2000mm

-

≤ 5mm/2000mm

Weight

1-20 tons per plate

±3%

Custom weights available


6. Heat Treatment Options


Treatment Type

Temperature Range

Purpose

Applicable Thickness

Normalizing

890-940°C

Grain refinement

All thicknesses

Stress Relieving

595-675°C

Stress reduction

>50mm thickness

Annealing

870-900°C

Softening

As required


7. Testing & Inspection


Mandatory Tests:

  • Tensile test (ASTM A370)

  • Bend test (ASTM A370)

  • Chemical analysis (ASTM A751)

  • Visual inspection

  • Dimensional inspection


Optional Tests:

  • Impact test

  • Hardness test

  • Ultrasonic testing (ASTM A578)

  • Macro examination

  • Third-party inspection


8. Applications


Primary Applications:

  • Pressure Vessels: Storage tanks, boilers

  • Heat Exchangers: Shells, tube sheets

  • Chemical Equipment: Reactors, process vessels

  • Water Treatment: Storage tanks, pressure vessels

  • Oil & Gas: Storage containers, separators


Service Conditions:

  • Maximum temperature: 400°C

  • Pressure rating: Per ASME Section VIII

  • Suitable for welding and forming operations


*All ASTM A285/A285M carbon steel plates are manufactured and tested in accordance with ASTM standards and can be supplied with additional testing to meet specific project requirements.*

◉ Surfcae selection

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SURFACE CHARACTERISTIC SUMMARY OF MANUFACTURING METHOD APPLICATION
NO.1 Silvery white Hot rolled to specified thickness Do not need to have a glossy surface use
lackluster
NO.2D Silvery white After cold rolling, heat treatment and pickling are carried out General material, deep material
NO.2B Gloss is stronger than No.2D After No.2D treatment, the final light cold rolling is carried out through the polishing roller The general material
BA As bright as a sixpence No standard, but usually a bright annealed surface with high reflectivity. Building materials, kitchen utensils
NO.3 Rough lapping Grind with 100~200# (unit) strop tape Building materials, kitchen utensils
NO.4 Intermediate grinding Polished surface obtained by grinding with 150~180# strop abrasive tape Building materials, kitchen utensils
NO.240 Fine lapping Grinding with 240# strop abrasive tape kitchenware
NO.320 Very fine grinding Grinding was carried out with 320# strop abrasive tape kitchenware
NO.400 The luster is close to BA Use 400# polishing wheel to grind General timber, building timber, kitchen appliances
HL Hairline grinding Suitable particle material for hair stripe grinding (150~240#) with many grains Building, construction material
NO.7 It's close to mirror grinding Use a 600# rotary polishing wheel to grind For art or decoration
NO.8 Mirror ultrafinish The mirror is ground with a polishing wheel Reflector, for decoration

◉ PRODUCTION AND WAREHOUSING

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