FORGED FITTINGS MATERIALS (A105 / A182 / A350)

Carbon steel fittings

  • ASTM A105 Specification for Carbon Steel Forgings for Piping Applications
  • ASTMA181 Specification for Carbon Steel Forgings, for General-Purpose Piping
  • ASTM A350 Specification for Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components
  • ASTM A694 Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings, Valves, and Parts for High-Pressure Transmission Service

Alloy steel fittings

  • ASTM A182 Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
  • ASTM A350 Specification for Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components
  • ASTM A694 Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings, Valves, and Parts for High-Pressure Transmission Service

Stainless steel fittings

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

Nickel alloy fittings

  • ASTM B160 Specification for Nickel Rod and Bar
  • ASTM B164 Specification for Nickel-Copper Alloy Rod, Bar, and Wire
  • ASTM B166 Specification for Nickel-Chromium-Iron Alloys (UNS N06600, N06601, N06603, N06690, N06693, N06025, and N06045) and Nickel-Chromium-Cobalt-Molybdenum Alloy (UNS N06617) Rod, Bar, and Wire
  • ASTM B462 Specification for Forged or Rolled UNS N06030, UNS N06022, UNS N06035, UNS N06200, UNS N06059, UNS N06686, UNS N08020, UNS N08024, UNS N08026, UNS N08367, UNS N10276, UNS N10665, UNS N10675, UNS N10629, UNS N08031, UNS *N06045, UNS N06025, and UNS R20033 Al
  • ASTM B564 Specification for Nickel Alloy Forgings

Copper and copper alloy pipe fittings

  • ASTM B21 Specification for Naval Brass Rod, Bar, and Shapes
  • ASTM B98 Specification for Copper-Silicon Alloy Rod, Bar and Shapes
  • ASTM B150 Specification for Aluminum Bronze Rod, Bar, and Shapes

Aluminium and aluminium alloy pipe fittings

  • ASTM B247 Specification for Aluminum and Aluminum-Alloy Die Forgings, Hand Forgings, and Rolled Ring Forgings

Titanium and titanium alloy pipe fittings

  • ASTM B381 Specification for Titanium and Titanium Alloy Forgings

ASTM A105 FORGED FITTINGS (CARBON STEEL FITTINGS)

A105 chemical composition, %
Element C Mn P S Si Cu Ni Cr Mo V
  0.35 max 0.60-1.05 0.035 max 0.040max 0.10-0.35 0.40max (1) 0.40max (1) 0.30max (1-2) 0.12max (1-2) 0.08max

Notes:

  1. The sum of Cu, Ni, Niobium, Moly and Vanadium shall not exceed 1.00%.
  2. The sum of Niobium and Molybdenum shall not exceed 0.32%.

Note: For each reduction of 0.01% below the specified carbon maximum (0.35%), an increase of 0.06% Manganese above the specified maximum (1.05%) is permitted up to a maximum of 1.35%.

The A105 specification from the ASTM website:

"This specification covers standards for forged carbon steel piping components, that is, flanges, fittings, valves, and similar parts, for use in pressure systems at ambient and higher-temperature service conditions. Materials shall be subjected to heat treatment (annealing, normalizing, tempering, or quenching). Material shall conform to carbon, manganese, phosphorus, sulfur, silicon, copper, nickel, chromium, molybdenum and vanadium contents. The forgings shall be subjected to tension, hardness and hydrostatic tests, with the latter applicable when required. Material shall adhere to tensile strength, yield strength, elongation, reduction of area, and hardness requirements. Guidelines for retreatment, repair by welding, and product marking are given. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This specification covers forged carbon steel piping components for ambient- and higher-temperature service in pressure systems. Included are flanges, fittings, valves, and similar parts ordered either to dimensions specified by the purchaser or to dimensional standards such as the MSS, ASME, and API specifications referenced in Section 2. Forgings made to this specification are limited to a maximum weight of 10 000 lb [4540 kg]. Larger forgings may be ordered to Specification A266/A266M. Tubesheets and hollow cylindrical forgings for pressure vessel shells are not included within the scope of this specification. Although this specification covers some piping components machined from rolled bar and seamless tubular products (see 5.2), it does not cover raw material produced in these product forms.

1.2 Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.

1.3 Specification A266/A266M covers other steel forgings and Specifications A675/A675M and A696 cover other steel bars.

1.4 This specification is expressed in both inch-pound units and SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units. The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

NOTE : The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as “nominal diameter,” “size,” and “nominal size.” (source: ASTM)

 

ASTM A182 FORGED FITTINGS (STAINLESS STEEL FITTINGS)

A182 chemical composition, %
A182 Grade C Mn P S Si Ni Cr Mo Nb Ti Others
F304(1) 0.08 2.0 0.045 0.030 1.0 8.0-11.0 18.0-20.0        
F304H 0.04-0.10 2.0 0.045 0.030 1.0 8.0-11.0 18.0-20.0        
F304L(1) 0.030 2.0 0.045 0.030 1.0 8.0-13.0 18.0-20.0        
F304N(2) 0.08 2.0 0.045 0.030 1.0 8.0-10.5 18.0-20.0        
F304LN(2) 0.030 2.0 0.045 0.030 1.0 8.0-10.5 18.0-20.0        
F309H 0.04-0.10 2.0 0.045 0.030 1.0 12.0-15.0 22.0-24.0        
F310 0.25 2.0 0.045 0.030 1.0 19.0-22.0 24.0-26.0        
F310H 0.04-0.10 2.0 0.045 0.030 1.0 19.0-22.0 24.0-26.0        
F310MoLN 0.030 2.0 0.030 0.015 0.40 21.0-23.0 24.0-26.0 2.0-3.0     N 0.10-0.16
F316 0.08 2.0 0.045 0.030 1.0 10.0-14.0 16.0-18.0 2.0-3.0      
F316H 0.04-0.10 2.0 0.045 0.030 1.0 10.0-14.0 16.0-18.0 2.0-3.0      
F316L(1) 0.030 2.0 0.045 0.030 1.0 10.0-15.0 16.0-18.0 2.0-3.0      
F316N(2) 0.08 2.0 0.045 0.030 1.0 11.0-14.0 16.0-18.0 2.0-3.0      
F316LN(2) 0.030 2.0 0.045 0.030 1.0 11.0-14.0 16.0-18.0 2.0-3.0      
F316Ti 0.08 2.0 0.045 0.030 1.0 10.0-14.0 16.0-18.0 2.0-3.0   (3) N 0.10 max
F317 0.08 2.0 0.045 0.030 1.0 11.0-15.0 18.0-20.0 3.0-4.0      
F317L 0.030 2.0 0.045 0.030 1.0 11.0-15.0 18.0-20.0 3.0-4.0      
F321 0.08 2.0 0.045 0.030 1.0 9.0-12.0 17.0-19.0     (4)  
F321H 0.04-0.10 2.0 0.045 0.030 1.0 9.0-12.0 17.0-19.0     (5)  
F347 0.08 2.0 0.045 0.030 1.0 9.0-13.0 17.0-20.0   (6)    
F347H 0.04-0.10 2.0 0.045 0.030 1.0 9.0-13.0 17.0-20.0   (7)    
F348 0.08 2.0 0.045 0.030 1.0 9.0-13.0 17.0-20.0   (6)   Co 0.20
Ta 0.10
F348H 0.04-0.10 2.0 0.045 0.030 1.0 9.0-13.0 17.0-20.0   (7)   Co 0.20
Ta 0.10

Notes:

  1. Grades F304, F304L, F316, and F316L shall have a maximum Nitrogen of 0.10%.
  2. Grades F304N, F316N, F304LN, and F316LN shall have a Nitrogen of 0.10 to 0.16%.
  3. Grade F316Ti shall have a Titanium content five times above the Carbon plus Nitrogen and not more than 0.70%.
  4. Grade F321 shall have a Titanium content five times above the Carbon and not more than 0.70%.
  5. Grade F321H shall have a Titanium content four times above the Carbon and not more than 0.70%.
  6. Grades F347 and F348 shall have a Niobium content ten times above the Carbon and not more than 1.10%.
  7. Grades F347H and F348H shall have a Niobium content above than eight times the Carbon and not more than 1.10%.

The A182 specification from the ASTM website:

"This specification covers forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves and parts for high-temperature service. After hot working, forgings shall be cooled to a specific temperature prior to heat treatment, which shall be performed in accordance with certain requirements such as heat treatment type, austenitizing/solution temperature, cooling media, and quenching. The materials shall conform to the required chemical composition for carbon, manganese, phosphorus, silicon, nickel, chromium, molybdenum, columbium, titanium. The material shall conform to the requirements as to mechanical properties for the grade ordered such as tensile strength, yield strength, elongation, Brinell hardness. All H grades and grade F 63 shall be tested for average grain size. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This specification covers forged low alloy and stainless steel piping components for use in pressure systems. Included are flanges, fittings, valves, and similar parts to specified dimensions or to dimensional standards, such as the ASME specifications that are referenced in Section 2.

1.2 For bars and products machined directly from bar (other than those directly addressed by this specification; see 6.4), refer to Specifications A479/A479M and A739 for the similar grades available in those specifications. Products made to this specification are limited to a maximum weight of 10 000 lb [4540 kg]. For larger products and products for other applications, refer to Specifications A336/A336M and A965/A965M for the similar ferritic and austenitic grades, respectively, available in those specifications.

1.3 Several grades of low alloy steels and ferritic, martensitic, austenitic, and ferritic-austenitic stainless steels are included in this specification. Selection will depend upon design and service requirements. Several of the ferritic/austenitic (duplex) grades are also found in Specification A1049/A1049M.

1.4 Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.

1.5 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.

1.6 The values stated in either SI units or inch-pound units are to be regarded separately as the standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard". (source: ASTM)

 

CHEMICAL COMPOSITION / TENSILE AND YIELD STRENGH OF ASTM A105 / A182 / A266 / A350

  Chemical Composition, max (unless range is given), % Tensile Properties, min (unless range is given)
Specification Grade or Class C Si Mn S P Cu Ni Cr Mo V Cb/Nb Tensile Strength min, Ksi Yield Point
Ksi
Yield Strength
Ksi @ 0.2%
Elongation in 2 in, %
ASTM A105   0.35 0.10-0.35 0.60-1.05 0.040 0.035 0.40 0.40 0.30 0.12 0.08   70   36 22
ASTM A181 60 0.35 0.10-0.35 1.10 0.050 0.050             60   30 22
70 0.35 0.10-0.35 1.10 0.050 0.050             70   36 18
ASTM A266 1 0.30 0.15-0.35 0.40-1.05 0.025 0.025             60-85   30 23
2 0.30 0.15-0.35 0.40-1.05 0.025 0.025             70-95   36 20
3 0.35 0.15-0.35 0.80-1.35 0.025 0.025             70-95   36 20
4 0.30 0.15-0.35 0.80-1.35 0.025 0.025             75-100   37.5 19
ASTM A350 LF1 0.30 0.15-0.30 0.60-1.35 0.040 0.035 0.40 0.40 0.30 0.12 0.08 0.02 60-85   30 25
LF2-1 0.30 0.15-0.30 0.60-1.35 0.040 0.035 0.40 0.40 0.30 0.12 0.08 0.02 70-95   36 22
LF2-2 0.30 0.15-0.30 0.60-1.35 0.040 0.035 0.40 0.40 0.30 0.12 0.08 0.02 70-95   36 22
LF3-1 0.20 0.20-0.35 0.90 0.040 0.035 0.40 3.30-3.70 0.30 0.12 0.03 0.02 70-95   37.5 22
LF3-2 0.20 0.20-0.35 0.90 0.040 0.035 0.40 3.30-3.70 0.30 0.12 0.03 0.02 70-95   37.5 22
LF5-1 0.30 0.20-0.35 0.60-1.35 0.040 0.035 0.40 1.00-2.00 0.30 0.12 0.03 0.02 60-85   30 25
LF5-2 0.30 0.20-0.35 0.60-1.35 0.040 0.035 0.40 1.00-2.00 0.30 0.12 0.03 0.02 70-95   37.5 22
LF6-1 0.22 0.15-0.30 1.15-1.50 0.025 0.025 0.40 0.40 0.30 0.12 0.04-0.11 0.02 66-91   52 22
LF6-2 0.22 0.15-0.30 1.15-1.50 0.025 0.025 0.40 0.40 0.30 0.12 0.04-0.11 0.02 75-100   60 20
LF6-3 0.22 0.15-0.30 1.15-1.50 0.025 0.025 0.40 0.40 0.30 0.12 0.04-0.11 0.02 75-100   60 20
LF9 0.20   0.40-1.06 0.040 0.035 0.75-1.25 1.60-2.24 0.30 0.12 0.03 0.02 63-88   46 25
LF787-2 0.07 0.40 0.40-0.70 0.025 0.025 1.00-1.30 0.70-1.00 0.60-0.90 0.15-0.25 0.03 0.02 min 65-85   55 20
LF787-3 0.07 0.40 0.40-0.70 0.025 0.025 1.00-1.30 0.70-1.00 0.60-0.90 0.15-0.25 0.03 0.02 min 75-95   65 20

 

 

Looking for additional info? Contact the pipingonline expert team

Useful links: ANSI | ASME | ASTM | API | MSS | BS | DIN | ISO