sa-612

SPECIFICATION FOR PRESSURE VESSEL PLATES, CARBON STEEL,HIGH STRENGTH,FOR MODERATE AND LOWER TEMPERATURE SERVICE

SA-612/SA-612M

(Identical with ASTM Speci?cation A612/A612M-90.)

1.Scope

1.1This speci?cation covers killed carbon-manga-

nese-silicon steel plates intended for welded pressure

vessels in service at moderate and lower temperatures.

1.2The maximum thickness of plates supplied under

this speci?cation is1in.[25mm].

1.3The 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 https://www.wendangku.net/doc/ac672266.html,bining values from the two systems may

result in nonconformance with the speci?cation.

2.Referenced Documents

2.1ASTM Standards:

A20/A20M Speci?cation for General Requirements for

Steel Plates for Pressure Vessels

A435/A435M Speci?cation for Straight-Beam Ultra-

sonic Examination of Steel Plates

A577/A577M Speci?cation for Ultrasonic Angle-Beam

Examination of Steel Plates

A578/A578M Speci?cation for Straight-Beam Ultra-

sonic Examination of Plain and Clad Steel Plates for

Special Applications

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3.General Requirements and Ordering

Information

3.1Material supplied to this material speci?cation

shall conform to Speci?cation A20/A20M.These

requirements outline the testing and retesting methods

and procedures,permissible variations in dimensions

and weight,quality and repair of defects,marking,

loading,etc.

3.2Speci?cation A20/A20M also establishes the

rules for the ordering information that should be com-

plied with when purchasing material to this speci?cation.

3.3In addition to the basic requirements of this

speci?cation,certain supplementary requirements are

available when additional control,testing,or examina-

tion is required to meet end use requirements.These

include:

3.3.1Vacuum treatment,

3.3.2Additional or special tension testing,

3.3.3Impact testing,and

3.3.4Nondestructive examination.

3.4The purchaser is referred to the listed supplemen-

tary requirements in this speci?cation and to the detailed

requirements in Speci?cation A20/A20M.

3.5If the requirements of this speci?cation are in

con?ict with the requirements of Speci?cation A20/

A20M,the requirements of this speci?cation shall

prevail.

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SA-612/SA-612M1998SECTION II

4.Manufacture

4.1Steelmaking Practice—The steel shall be killed

and shall conform to the?ne austenitic grain size

requirement of Speci?cation A20/A20M.

5.Heat Treatment

5.1Plates are normally supplied in the as-rolled

condition.Plates may be ordered normalized or stress

relieved,or both.

6.Chemical Requirements

6.1The steel shall conform to the requirements as

to chemical composition shown in Table1unless

otherwise modi?ed in accordance with Supplementary

Requirement S17,Vacuum Carbon-Deoxidized Steel,

in Speci?cation A20/A20M.

7.Mechanical Requirements

7.1Tension Test Requirements—The material as

represented by the tension test specimens shall conform

to the requirements shown in Table2.

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PART A—FERROUS MATERIAL SPECIFICATIONS SA-612/SA-612M

TABLE198

CHEMICAL REQUIREMENTS

Composition,%

Thickness

Over0.750

0.750in.to1in.

[20mm][20to25

Elements and Under mm],incl

Carbon,max:

Heat analysis0.250.25

Product analysis0.290.29

Manganese

Heat analysis 1.00–1.35 1.00–1.50

Product analysis0.92–1.460.92–1.62

Phosphorus,max A0.0350.035

Sulfur,max A0.0350.035

Silicon

Heat analysis0.15–0.400.15–0.50

Product analysis0.13–0.450.13–0.55

Copper,max:B

Heat analysis0.350.35

Product analysis0.380.38

Nickel,max:B

Heat analysis0.250.25

Product analysis0.280.28

Chromium,max:B

Heat analysis0.250.25

Product analysis0.290.29

Molybdenum,max:B

Heat analysis0.080.08

Product analysis0.090.09

Vanadium,max:B

Heat analysis0.080.08

Product analysis0.090.09

A Applies to both heat and product analyses.

B When analysis shows that the amount of an element is0.02%or lower,the value may be reported as

?0.02%.

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SA-612/SA-612M1998SECTION II

TABLE2

98

TENSILE REQUIREMENTS

Thickness

Over0.5in.

0.5in.to1in.

[12.5mm][Over12.5to

and Under25mm] Tensile strength,ksi[MPa]83–10581–101

[570–725][560–695] Yield strength,min.A ksi[MPa]50[345]50[345]

Elongation in8in.[200mm],min,%B1616

Elongation in2in.[50mm],min,%2222

A Determined by either the0.2%offset method or the0.5%extension-under-load method.

B See Specification A20/A20M for elongation adjustments.

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PART A—FERROUS MATERIAL SPECIFICATIONS SA-612/SA-612M SUPPLEMENTARY REQUIREMENTS

Supplementary requirements shall not apply unless speci?ed in the order.

A list of standardized supplementary requirements for use at the option of the

purchaser are included in Speci?cation A20/A20M.Several of those considered

suitable for use with this speci?cation are listed by title.Other tests may be performed

by agreement between the supplier and the purchaser.

S1.Vacuum Treatment,

S2.Product Analysis,

S3.Simulated Post-Weld Heat Treatment of

Test Coupons,

S4.1Additional Tension Test,

S5.Charpy V-Notch Impact Test,

S6.Drop Weight Test,

S7.High Temperature Tension Test,

S8.Ultrasonic Examination in accordance with

Speci?cation A435/A435M,

S9.Magnetic Particle Examination,

S11.Ultrasonic Examination in accordance with

Speci?cation A577/A577M,

S12.Ultrasonic Examination in accordance with

Speci?cation A578/A578M,

S14.Bend Test,and

S17.Vacuum Carbon-Deoxidized Steel.

1101