A285 Steel Plate

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ASTM A285 Grade C is a low to intermediate yield steel used in the fabrication of carbon steel pressure vessels and boilers.

The steel is intended for use in standard tanks and boilers rather than high pressurised vessels due to the steels lower yield strength. ASTM A285 Grade C is supplied throughout the oil gas and petrochemical industry, and Masteel UK Limited hold this material in stock.

The material has good forming and welding characteristics under conventional methods.

Pressure Vessel Plates, Carbon Steel, Low and Intermediate Tensile Strengh to ASTM A285 Standard:

ASTM A285 Steel plates are intended for fusion-welded pressure vessels. Plates under this specification are available in three grades having different strength levels

We can supply:

Thickness from 6mm to 150mm (although thicker plates might be manufactured under special order)
Width: from 1,500mm to 4,100mm
Length: from 6,000mm to 20,000mm

This specification covers low and intermediate tensile strength carbon steel plates produced as killed, semi-killed, capped, or rimmed steel. These plates are intended for fusion-welded pressure vessels. The maximum plate thickness under ASTM A285, for reasons of internal soundness, is 2 in. [50 mm] for all grades. For killed carbon steels only refer to the following ASTM specifications:
A299/A299M Manganese-silicon carbon steel pressure vessel plates.
A515/A515M Carbon steel pressure vessel plates for intermediate and high temperature service.

A516/A 516M Carbon steel pressure vessel plates for moderate and low temperature service.

For plates produced from coil, additional requirements, including additional testing and reporting of test results, of ASTM A20/A20M apply.

Standard Specification for Pressure Vessel Plates, Carbon Steel, Low- and
Intermediate-Tensile Strength

1. Scope
1.1 This specification2 covers carbon steel plates of lowand intermediate-tensile strengths which may be made by killed, semi-killed, capped, or rimmed steel practices at the producer’s option. These plates are intended for fusion-welded pressure vessels.
1.2 Plates under this specification are available in three grades having different strength levels as follows:

1.3 The maximum thickness of plates under this specification, for reasons of internal soundness, is limited to a maximum thickness of 2 in. [50 mm] for all grades.
NOTE 1—For killed carbon steels only refer to the following ASTM specifications:3
A 299/A 299M Pressure Vessel Plates, Carbon Steel, Manganese-Silicon.
A 515/A 515M Pressure Vessel Plates, Carbon Steel, for Intermediate and
Higher-Temperature Service.
A 516/A 516M Pressure Vessel Plates, Carbon Steel, for Moderate- and
Lower-Temperature Service.

1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the
two systems may result in nonconformance with the specification.

2. General Requirements and Ordering Information

2.1 Material supplied to this material specification shall conform to Specification A 20/A 20M. These requirements outline the testing and retesting methods and procedures, permissible variations in dimensions and mass, quality and
repair of defects, marking, loading, etc.

2.2 Specification A 20/A 20M also establishes the rules for the ordering information that should be complied with when purchasing material to this specification.

2.3 In addition to the basic requirements of this specification, certain supplementary requirements are available when additional control testing or examination is required to meet end use requirements. The purchaser is referred to the listed supplementary requirements in this specification and to the detailed requirements in Specification A 20/A 20M.

2.4 If the requirements of this specification are in conflict with the requirements of Specification A 20/A 20M, the requirements of this specification shall prevail.

3. Heat Treatment
3.1 Plates are normally supplied in the as-rolled condition. The plates may be ordered normalized or stress relieved, or both.

4. Chemical Requirements

4.1 The steel shall conform to the requirements as to chemical composition as shown in Table 1.

5. Mechanical Requirements

5.1 Tension Tests:

5.1.1 Requirements—The material as represented by the tension-test specimens shall conform to the requirements shown in Table 2.

Table 1 Chemical Composition

^AApplies to both heat and product analyses.

Table 2 Tensile Requirements

^ADetermined by either the 0.2 % offset method or the 0.5 % extension-under-load method.
^BSee Specification A 20/A 20M for elongation adjustment.

Supplementary Requirements

Supplementary requirements shall not apply unless specified in the order.
A list of standardized supplementary requirements for use at the option of the purchaser are included in Specification A 20/A 20M. Those which are considered suitable for use with this specification are listed below by title.

S3. Simulated Post-Weld Heat Treatment of Mechanical Test Coupons

S3.1 Prior to testing, the test coupons representing the plate for acceptance purposes for mechanical properties shall be thermally treated to simulate a post-weld heat treatment below the critical temperature (Ac3), using the heat treatment parameters (such as temperature range, time, and cooling rates)
specified in the purchase order. For tests using specimens taken from such heat treated test coupons, the test results shall meet the requirements of the applicable product specification.

S4. Additional Tension Test

S4.1 Other Than Quenched-and-Tempered Plates—In addition to the required single tension test, a second tension test shall be made using a test specimen taken from a test coupon taken from a corner of the plate-as-rolled on the end opposite the single test specimen and in a direction parallel to the single test specimen. The results obtained using this second test specimen shall meet the requirements of the applicable product specification.

S4.2 Quenched-and-Tempered Plates 2 in. [50 mm] or Greater in Thickness—In addition to the required tension tests, two additional test coupons shall be taken from the bottom corner of the plate. One shall be taken at the center of the plate thickness and the other immediately beneath the surface. Mandatory conformance of these additional tests with the specified properties shall be a matter of agreement between the manufacturer and the purchaser.

S14. Bend Test.

Additional Suplementary Requirements

Also listed below are additional optional supplementary requirements suitable for this specification:

S57. Copper-Bearing
S57.1 The copper content, by heat analysis shall be 0.20–0.35 % and by product analysis 0.18–0.37 %.

S58. Restricted Copper
S58.1 The maximum incidental copper content by heat analysis shall not exceed 0.25 %.

Equivalent Grades for A285 Gr A, B, C

Steel for Boilers and Pressure Vessels

Boiler Steel

General Purpose Structural Steels