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ASTM A240/A240M Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications

Duplex (Austenitic-Ferritic) steel

UNS Designation : S31803

Chemical Composition Requirements, %
C: ≤0.030
Mn: ≤2.00
P: ≤0.030
S: ≤0.020
Si: ≤1.00
Cr: 21.0-23.0
Ni: 4.5-6.5
Mo: 2.5-3.5
N: 0.08-0.20

Mechanical Test Requirements
Tensile Strength: ≥620Mpa
Yield Strength: ≥450MPa
Elongation in 2 in. or 50 mm: ≥25%
Hardness:
Brinell: ≤293
Rockwell (C scale): ≤31
Cold bend: not required

ASTM A182 – Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High Temperature Service

Grade: F53 (ferritic-austenitic stainless steel)

UNS number： S32750

Chemical Requirements, %

C: ≤0.030

Mn: ≤1.20

P: ≤0.035

S: ≤0.020

Si: ≤0.80

Cr: 24.0-26.0

Ni: 6.0-8.0

Mo: 3.0-5.0

N: 0.24-0.32

Cu: ≤0.50

Heat treatment

Solution treat and quench, ≥1025 °C

Cooling media, liquid

Quenching cool below 260℃

Tensile Requirements

Thickness	≤50mm	＞50mm
Tensile Strength	≥800MPa	≥730MPa
Yield Strength	≥550MPa	≥515MPa

Elongation2 in. or 50 mm (or 4D), ≥15%

Brinell Hardness, ≤310

ASTM A240/A240M Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications.

Duplex (Austenitic-Ferritic) steel

Type: 2205
UNS Designation : S32205

Chemical Composition Requirements, %, Max.
C: 0.030
Mn: 2.00
P: 0.030
S: 0.020
Si: 1.00
Cr: 22.0-23.0
Ni: 4.5-6.5
Mo:3.0-3.5
N: 0.14-0.20

Mechanical Test Requirements
Tensile Strength, min: 655Mpa
Yield Strength, min: 450MPa
Elongation in 2 in. or 50 mm, min, %: 25
Hardness, max.: Brinell :293, Rockwell C scale: 31
Cold bend: not required

ASTM A 790 Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe

This specification covers seamless and straight-seam welded ferritic/austenitic steel pipe intended for general corrosive service, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.

UNS number: S32205 (Ferritic/Austenitic steel)

Heat Treatment

Temperature: 1025-1125 °C

Quench: rapid cooling in air or water

Chemical requirements, %,

C: ≤0.030

Mn: ≤1.20

P: ≤0.035

S: ≤0.020

Si: ≤0.80

Cr: 24.0-26.0

Ni: 6.0-8.0

Mo: 3.0-5.0

N: 0.24-0.32

Cu: ≤0.50

Tensile requirements

Tensile Strength: ≥800MPa

Yield Strength.: ≥550MPa

Elongation in 2 in. or 50 mm, %: ≥15

Hardness:

HBW: ≤300

HRC: ≤32

Each tube shall be subjected to the nondestructive electric test or the hydrostatic test.

Permissible Variations in Wall Thickness

The minimum wall thickness at any point shall not be more than 12.5 % under the nominal wall thickness specified.

Permissible Variations in Outside Diameter

NPS	Over, mm	Under, mm
1⁄8 –1 1⁄2, incl	0.4	0.8
Over 11⁄2 to 4, incl	0.8	0.8
Over 4 to 8, incl	1.6	0.8
Over 8 to 18, incl	2.4	0.8
Over 18 to 26, incl	3.2	0.8
Over 26 to 34, incl	4.0	0.8
Over 34 o 48, incl	4.8	0.8

A790/A790M Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe

Ordering Information

Orders for material under this specification should include the following, as required, to describe the desired material adequately:
1 Quantity (feet, metres), or number of lengths),
2 Name of material (ferritic/austenitic steel pipe),
3 Process (seamless or welded),
4 Grade,
5 Size (NPS designator or outside diameter and schedule number of average wall thickness),
6 Length (specific or random) (see Section 11),
7 End finish (section on ends of Specification A999/A999M),
8 Optional requirements (product analysis, hydrostatic test or nondestructive electric test),
9 Test report required (section on certification of Specification A999/A999M),
10 Specification designation, and
11 Special requirements and any supplementary requirements selected.

ASTM A815 Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings

Class WP fittings are subdivided into four subclasses:

Class WP-S fittings are those manufactured form seamless product by a seamless method of manufacture;
Class WP-W fittings are those which contain welds where the fitting fabrication or construction welds have been radiographed;
Calss WP-WX fittings are those which contain welds where all welds have been radiographed;
Class WP-WU fittings are those which contain welds where all welds have been ultrasonically tested.

ASTM A480/A480M General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip

Ordering Information

It is the responsibility of the purchaser to specify all requirements that are necessary for material ordered under this specification. Such requirements may include, but are not limited to, the following:

1. Quantity (weight and number of pieces),

2. Name of material (stainless steel),

3. Condition (hot-rolled, cold-rolled, annealed, heat-treated),

4. Finish; in the case of polished finishes, specify whether one or both sides are to be polished,

5. Temper (if the applicable material specification requires this detail),

6. Form (plate, sheet, or strip),

7. Dimensions (thickness, width, and length),

7.1 Thickness shall be ordered to decimal or fractional thickness. The use of the gauge number is discouraged as being an archaic term of limited usefulness not having general agreement on meaning. The gauge number shall not be a basis for rejection.

7.2 Thickness, width, and length, when applicable, should be ordered in the same units, for example, 0.060 by 48 by 120 in. [1.52 by 1219 by 3048 mm].

8. Edge, strip only,

9. Type or UNS designation, refer to the applicable material specification,

10. Specification designation and date of issue,

11. Additions to specification or special requirements,

12. Restrictions (if desired) on methods for determining yield strength,

13. Marking requirements,

14. Preparation for delivery, and

15. Magnetic permeability test (when required).

Scope of ASTM A276
This specification covers hot-finished or cold-finished bars except bars for reforging. It includes rounds,squares, and hexagons, and hot-rolled or extruded shapes, such as angles, tees, and channels in the more commonly used types of stainless steels. The free-machining types for general corrosion resistance and high-temperature service are covered in a separate specification.

Ordering Information
It is the responsibility of the purchaser to specify all requirements that are necessary for material ordered under this specification. Such requirements may include but are not limited to the following:
1 Quantity (weight or number of pieces),
2 Name of material: stainless steel,
3 Form (bars, angles, and so forth),
4 Condition ,
5 Finish (Section 8 of Specification A484/A484M),
6 Surface preparation of shapes (Section 8 of Specification A484/A484M),
7 Applicable dimensions including size, thickness, width, and length, l,
8 Cross section (round, square, and so forth),
9 Type or UNS designation,
10 ASTM designation and date of issue, and
11 Whether bars are to be rolled as bars or cut from strip or plate.
12 Test for magnetic permeability when specified by customer purchase order when ordering Types 201 and 205.
13 Choice of testing track from the options listed in Test Methods A1058 when material is ordered to an M suffix (SI units) product standard. If the choice of test track is not specified in the order, then the default ASTM track shall be used as noted in Test Methods A1058.
14 Supplementary requirements, and
15 Additional requirements.

UNS number： S32205 (ferritic-austenitic stainless steel)

Chemical Requirements, max，%
C: ≤0.030
Mn:≤2.00
P: ≤0.030
S: ≤0.020
Si: ≤1.00
Cr: 22.0-23.0
Ni: 4.5-6.5
Mo: 3.0-3.5
N: 0.14-0.20

Heat Treatment
Solution treat and quench: ≥1020 °C
Cooling media: liquid
Quenching cool below 260℃

Tensile Requirements
Tensile Strength: ≥655MPa
Yield Strength: ≥450MPa
Elongation2 in. or 50 mm (or 4D): ≥25%
Brinell Hardness, HBW: ≤290

1.0 Scope

1.1 This specification is for seamless 4140 API 5CT chromium-molybdenum low alloy steels in quenched and tempered condition with 110 ksi MYS.

1.2 Material is to conform to the requirements of NACE MR0175 (ISO 15156-2) and is resistant to Sulfide Stress Cracking (SSC) in H2S containing environments.

2.0 Chemistry

2.1 Composition of material supplied shall conform to the following limits. Reported results

must include the results of quantitative determinations of all elements listed, plus all elements used to control mechanical properties.

Element Symbol   Min    Max

Carbon      C           0.38      0.43

Manganese  Mn     0.75   1.00

Phosphorus   P          –    0.025

Sulfur        S               –      0.025

Silicon       Si       0.15       0.35

Chromium    Cr 0.80      1.10

Nickel      Ni        –            0.25

Molybdenum Mo 0.15 0.25

Copper      Cu        –          0.35

2.2 Material shall also meet to minimum ideal diameter (DI) 5.40 by controlling the chemistry to ensure hardenability.

2.3 Composition testing shall be performed in accordance to ASTM A751 or any procedure used to determine composition of steels which provides equivalent results per ASTM A751.

3.0 Mechanical Properties

3.1 Mechanical properties of material shall conform to the following requirements per ASTM A370 latest revision. Test specimen shall be determined from a prolongation removed only after final heat treatment.

Minimum Ultimate Tensile Strength 125 ksi (862 MPa)

Minimum Yield Strength (0.5% extension under load) 110 – 140 ksi (758 – 965 MPa)

Minimum Elongation to Fracture 13%

Minimum Reduction of Area 40%

Surface Hardness 30 – 33 HRC (285-311 HB)

Minimum As-Quenched Hardness 45 HRC

Charpy V-Notch Impact Strength

At 0°C (32°F)

Minimum Average Value – Transverse 41 J

Minimum Average Value – Longitudinal 41 J

3.2 All tensile testing shall be tested on round specimen machined from mid-radius or full wall

longitudinal strip specimen. This specification will require 2 tests to be done per heat.

Gauge length and specimen cross section dimensions must be reported.

3.3 Hardness test should be performed using Brinell or Rockwell hardness testing which

conform to ASTM E10 or E18. Hardness is required to be measured at material’s surface and also to performed quadrant hardness test. For quadrant hardness test, unmachined outer diameter of material is required to have 1/16” removed off by grinding or buffing to produce a flat surface testing area. ASTM E140 hardness conversion table shall be used when converting between scales.

This specification will require 2 quadrant hardness test to be done per heat. Quadrant testing shall be done in three locations of each quadrant, ie near the outer diameter, midwall and near the inner diameter. A through-wall hardness test is comprised of hardness value for each location within a quadrant. The mean hardness value must meet to specification requirement.

For each size, mass, chemical composition and austenize and quench combination, a through wall hardness test is to be made after quenching and prior to tempering to confirm on sufficient hardening and this value is to be documented.

3.4 Charpy Impact Testing must conform to ASTM E23 on each heat, size and heat treat lot at temperature of 32°F (0°C) or below. The test specimens shall be from the same test piece and test locations as used for mechanical tests with minimum of three charpy test specimens to be done to constitute a charpy impact testing. Test specimen can be oriented either transverse or longitudinal. Test specimen dimension should be 10 mm x 10 mm. A test shall consist of a set of 3 specimens taken from one location from a singular tubular product length.

The average value of the three specimens must equal or exceed the specified absorbed energy requirements. Not more than one specimen shall have an absorbed energy below the absorbed energy requirements.

4.0 CONDITION

4.2 The mill is responsible for selecting appropriate austenitizing and tempering temperatures, times at temperature and suitable quench media to achieve the required mechanical properties and toughness uniformly per heat treat lot.

4.3 Materials are not to be subjected to cold work after final tempering treatment except for normal straightening operations. Pipe rotary-straightened at temperatures less than 480°C is not to contain roll marks that exceed the maximum hardness specified in 3.1.

Pipe with severe roll marks is to be rejected or stress relieved at minimum 480°C.

4.4 Materials must be free of overlays and welding. Materials are also to be stress free.

4.5 Grain size of raw materials supplied shall be 5 or finer when determined as per ASTM E112 latest revision.

4.6 All seamless pipes shall have wall thickness verified as per API 5CT requirements. All pipes must be free from any quench crack, any surface breaking imperfections that reduces wall thickness below 87.50% of specified minimum, any non-surface breaking imperfections detected with an area greater than 0.40 in² when outline on surface and any linear imperfections of any orientation on any areas of the pipes with a depth greater than 5% of specified wall thickness.

4.7 Materials shall be full length inspected for detection of longitudinal imperfections on outside and inside surfaces to L4 level acceptance by

1. a) Ultrasonic testing conform to ISO 9303 or ASTM E213
2. b) Flux leakage testing conform to ISO 9402 or ASTM E570
3. c) Magnetic particle inspection conform to ISO 13665 or ASTM E709

4.8 All pipes OD surfaces required magnetic particle inspection conform to ISO 13665 or ASTM E709.

4.9 All NDE must be done by qualified NDE personnel and certified to ISO 11484 or ANSI-ASNTSNT-TC-1A latest revision.

5.0 REPORTS

5.1 All materials supplied to this specification must be accompanied by Mill Test Report

which is subjected to our Quality inspection upon receipt.

5.2 Mill Test Report must be inclusive of the following:

1. a) Material condition
2. b) Chemical Analysis
3. c) Tensile properties (including test specimens type and dimensions)
4. d) Hardness test
5. e) Charpy Impact Testing
6. f) Number of pieces per heat treat lot
7. g) Heat treat condition (including furnace times and temperature)
8. h) Visual inspection result
9. i) Quench media used
10. j) All NDE testing results and statement of processes used

5.3 Heat number, material grade and material size shall be permanently marked on each piece of material.