Carbon & Alloy Steel

Covers

• Steel pipe flanges
• Forged piping fittings
• Valves and similar pressure-system components
• Ambient- and higher-temperature service

Material Requirements

• Carbon steel forgings
• Chemical composition requirements
• Tensile and yield strength requirements
• Hardness and applicable testing requirements

Documents We Supply

• Material Test Certificate (EN 10204 3.1), where specified
• Chemical analysis and mechanical test results, as applicable
• Certificate of compliance, as applicable
• PMI and third-party inspection on request

Covers

• Nonstandard as-forged fittings
• Valve components
• Parts for general-purpose service
• Forgings up to 10,000 lb (4,540 kg)

Material Classes

• Class 60
• Class 70
• Carbon steel forgings
• Chemical composition and mechanical property requirements

Documents We Supply

• Chemical analysis results
• Tensile test results
• Material test report, as agreed or specified
• Certification and supplementary testing, as applicable

Covers

• Carbon steel castings for flanges and fittings
• Valves and other pressure-containing parts
• High-temperature service
• Castings suitable for assembly by fusion welding

Typical Grades

• WCA
• WCB
• WCC

Documents We Supply

• Chemical analysis results, as applicable
• Tensile and mechanical test results
• Material test report and certification, as applicable
• Additional inspection and testing on request

Covers

• Carbon and low-alloy steel forged or ring-rolled flanges
• Forged fittings and valves for piping applications
• Components primarily intended for low-temperature service
• Notch-toughness testing, including Charpy V-notch impact testing
• Components manufactured to specified dimensions or applicable dimensional standards

Typical Grades

• LF1
• LF2 — Classes 1 and 2
• LF3 — Classes 1 and 2
• LF5 — Classes 1 and 2
• LF6 — Classes 1, 2 and 3
• LF9
• LF787 — Classes 2 and 3

Documents We Supply

• Material test report with chemical analysis results
• Tensile and mechanical test results
• Charpy V-notch impact test results
• Heat-treatment and hardness test results, as applicable
• Supplementary testing and inspection documentation, when specified and available

Covers

• Steel castings for pipe flanges and fittings
• Valves and other pressure-containing parts
• Components primarily intended for low-temperature service
• Ferritic steel grades and one martensitic steel grade
• Charpy V-notch impact testing to evaluate notch toughness

Typical Grades

• LCA — Carbon steel
• LCB — Carbon steel
• LCC — Carbon-manganese steel
• LC1 — Carbon-molybdenum steel
• LC2 — 2½% nickel steel
• LC2-1 — Nickel-chromium-molybdenum steel
• LC3 — 3½% nickel steel
• LC4 — 4½% nickel steel
• LC9 — 9% nickel steel
• CA6NM — Martensitic stainless steel

Documents We Supply

• Chemical analysis results
• Tensile and mechanical test results
• Charpy V-notch impact test results
• Heat-treatment records, as applicable
• Inspection and supplementary test reports, when specified and available

Covers

• Forged or rolled steel pipe flanges
• Forged fittings, valves, and related components
• Parts suitable for high-strength transmission-service pipe
• Components made to purchaser-specified dimensions or applicable ASME/MSS dimensional standards
• Carbon steel, high-strength low-alloy steel, and alloy steel forgings

Typical Grades

• F42 — Minimum yield strength 42 ksi
• F46 — Minimum yield strength 46 ksi
• F48 — Minimum yield strength 48 ksi
• F50 — Minimum yield strength 50 ksi
• F52 — Minimum yield strength 52 ksi
• F56 — Minimum yield strength 56 ksi
• F60 — Minimum yield strength 60 ksi
• F65 — Minimum yield strength 65 ksi
• F70 — Minimum yield strength 70 ksi

Documents We Supply

• Chemical analysis results
• Tensile and mechanical test results
• Heat-treatment records, as applicable
• Material test report and certification, as specified
• Additional inspection and testing reports, when specified and available

Covers

• Forged carbon and alloy steel flanges
• Flanges intended primarily for petroleum and gas pipelines in areas subject to low ambient temperatures
• Flanges manufactured to specified dimensions or applicable MSS, ASME, and API dimensional standards
• Eight material grades, four yield-strength classes, and three notch-toughness levels
• Heat treatment and mechanical-property requirements applicable to the specified material grade and class

Material Grades

• Grade L1
• Grade L2
• Grade L3
• Grade L4
• Grade L5
• Grade L6
• Grade L7
• Grade L8

Documents We Supply

• Chemical analysis results, as specified
• Tensile and mechanical test results, as applicable
• Heat-treatment records, as applicable
• Material test report and certification, as specified
• Supplementary inspection and testing reports, when ordered and available

Covers

• Forged or ring-rolled steel flanges
• Forged carbon steel fittings and valves for pressure piping systems
• Components intended for service from −20°F to +650°F (−30°C to +345°C)
• Applications where inherent notch toughness is desired but notch-toughness testing is not required by this specification
• Forgings with a maximum finished section thickness of 2 in. (51 mm)
• Heat treatment and chemical composition requirements for the specified material

Material Requirements

• Carbon steel forgings
• Fully killed steel made using fine-grain practice
• Normalizing, normalizing and tempering, or quenching and tempering
• Chemical composition and tensile properties meeting the specification
• No impact-testing provisions under this specification; refer to ASTM A350/A350M when impact testing is required

Documents We Supply

• Chemical analysis results, as specified
• Tensile and mechanical test results, as applicable
• Heat-treatment records, as applicable
• Material test report and certification, as specified
• Supplementary inspection and testing reports, when ordered and available

Covers

• Carbon steel forgings for boilers and pressure vessels
• Forgings for associated equipment and pressure-containing components
• Components manufactured to purchaser-specified dimensions and requirements
• Forging, machining, heat-treatment, and inspection requirements
• Chemical composition and mechanical properties according to the specified grade

Material Grades

• Grade 1 — Carbon steel forgings
• Grade 2 — Carbon steel forgings
• Grade 3 — Carbon steel forgings
• Grade 4 — Carbon steel forgings

Documents We Supply

• Chemical analysis results, as specified
• Tensile and mechanical test results, as applicable
• Heat-treatment records, as applicable
• Material test report and certification, as specified
• Additional inspection and testing reports, when specified and available

Covers

• Carbon steel plates primarily intended for welded pressure vessels
• Applications where improved notch toughness is important
• Plate material for pressure-containing equipment operating at moderate and lower temperatures
• Chemical composition and tensile-property requirements for the specified grade
• Heat-treatment and supplementary testing requirements, as applicable

Material Grades

• Grade 55 — Tensile strength 55–75 ksi (380–515 MPa)
• Grade 60 — Tensile strength 60–80 ksi (415–550 MPa)
• Grade 65 — Tensile strength 65–85 ksi (450–585 MPa)
• Grade 70 — Tensile strength 70–90 ksi (485–620 MPa)

Documents We Supply

• Chemical analysis results, as specified
• Tensile and mechanical test results, as applicable
• Heat-treatment records, as applicable
• Material test report and certification, as specified
• Supplementary examination and testing reports, when ordered and available

Covers

• Ferritic alloy steel forgings for boilers and pressure vessels
• Forgings for high-temperature service and associated equipment
• Pressure-containing components manufactured from specified alloy steel grades
• Chemical composition and mechanical-property requirements for the specified grades
• Heat treatment, inspection and supplementary testing requirements, as applicable

Material Grades

• Grade F1 — Chromium-molybdenum alloy steel forging
• Grade F5 and F5A — Chromium-molybdenum alloy steel forgings
• Grade F6 — Chromium steel forging
• Grade F9 — Chromium-molybdenum alloy steel forging
• Grade F11, Classes 1, 2 and 3 — Chromium-molybdenum alloy steel forgings
• Grade F12 — Chromium-molybdenum alloy steel forging
• Grade F21, Classes 1 and 3 — Chromium-molybdenum alloy steel forgings
• Grade F22, Classes 1 and 3 — Chromium-molybdenum alloy steel forgings
• Grade F3V and F3VCb — Modified chromium-molybdenum alloy steel forgings
• Grade F22V — Modified chromium-molybdenum alloy steel forging
• Grade F91 and F911 — Creep-resistant alloy steel forgings for high-temperature service

Documents We Supply

• Material Test Certificate, as specified
• Chemical analysis results, as applicable
• Tensile and mechanical test results, as applicable
• Heat-treatment records, where applicable
• Inspection and supplementary testing reports, when ordered and available

Covers

• Heat-treated carbon steel and alloy steel forgings with mandatory toughness requirements
• Forgings intended for pressure vessels, feedwater heaters and similar applications
• Tube sheets, covers, channel barrels, integral forged channels, rings, nozzles and flanges
• Chemical composition and tensile-property requirements for the specified grade
• Charpy V-notch impact testing at the specified test temperature
• Heat treatment, inspection, testing and certification requirements

Material Grades

• Grade I — Carbon steel forging grade
• Grade II — Carbon steel forging grade
• Grade III — Nickel-alloy steel forging grade
• Grade IV — Carbon and low-alloy steel forging grade
• Grade V, Class 1 — Pressure-vessel-component forging grade
• Grade V, Class 2 — Pressure-vessel-component forging grade

Grade V has two classes. The standard identifies five grades in total, with separate mechanical-property requirements for the applicable grade and class.

Documents We Supply

• Chemical analysis results, as specified
• Tensile and impact test results, as applicable
• Heat-treatment records, as applicable
• Material test report and certification, as specified
• Magnetic particle, ultrasonic or liquid penetrant examination reports, when ordered
• Third-party inspection documentation, when agreed

Covers

• Untreated and heat-treated carbon and alloy steel forgings for general industrial use
• Forged components manufactured by hot mechanical working
• Applications involving shafts, disks, rings, hollow forgings and other industrial components
• Six carbon steel classes and seven alloy steel classes with specified heat-treatment and mechanical-property requirements
• Chemical composition, tensile properties and hardness requirements
• Heat treatment, inspection, testing, certification and marking requirements

Material Classes

• Class A — Untreated carbon steel forgings
• Class B — Carbon steel forgings; annealed, normalized, or normalized and tempered
• Class C — Carbon steel forgings; annealed, normalized, or normalized and tempered
• Class D — Carbon steel forgings; annealed, normalized, or normalized and tempered
• Class E — Carbon steel forgings; normalized and tempered or double-normalized and tempered
• Class F — Carbon steel forgings; quenched and tempered, or normalized, quenched and tempered
• Classes G, H, J, K, L, M and N — Alloy steel forgings with class-specific heat-treatment and mechanical-property requirements

Classes A–F cover carbon steel, while Classes G–N cover alloy steel; Class I is not used. The suffix H (for example, AH or BH) identifies forgings supplied on the basis of hardness testing alone when specified.

Documents We Supply

• Chemical analysis results, as specified
• Tensile and hardness test results, as applicable
• Heat-treatment records, where applicable
• Material test report and certification, as specified
• Magnetic particle or ultrasonic examination reports, when ordered
• Supplementary testing and inspection reports, when specified