ASTM A182/A182M: American Society for Testing and Materials
Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service.
Scope: Forged low alloy and stainless steel piping components for use in pressure systems.

Mechanical Properties
Identification Symbol	Tensile Strength, min, ksi [MPa]	Yield Strength, min, ksi [MPa]	Elongation in 2 in. [50 mm] or 4D,min, %	Reduction of Area, min, %	Brinell Hardness Number, HBW
F5	70 [485]	40 [275]	20	35	143-217
F9	85 [585]	55 [380]	20	40	179-217
F91	90 [620]	60 [415]	20	40	190-248
F11 Class 1	60 [415]	30 [205]	20	45	121-174
F11 Class 2	70 [485]	40 [275]	20	30	143-207
F11 Class 3	75 [515]	45 [310]	20	30	156-207
F12 Class 1	60 [415]	32 [220]	20	45	121-174
F12 Class 2	70 [485]	40 [275]	20	30	143-207
F22 Class 1	60 [415]	30 [205]	20	35	170max
F22 Class 3	75 [515]	45 [310]	20	30	156-207

Mechanical Properties
Identification Symbol	Tensile Strength, min, ksi [MPa]	Yield Strength, min, ksi [MPa]	Elongation in 2 in. [50 mm] or 4D,min, %	Reduction of Area, min, %	Brinell Hardness Number, HBW
F5	70 [485]	40 [275]	20	35	143-217
F9	85 [585]	55 [380]	20	40	179-217
F91	90 [620]	60 [415]	20	40	190-248
F11 Class 1	60 [415]	30 [205]	20	45	121-174
F11 Class 2	70 [485]	40 [275]	20	30	143-207
F11 Class 3	75 [515]	45 [310]	20	30	156-207
F12 Class 1	60 [415]	32 [220]	20	45	121-174
F12 Class 2	70 [485]	40 [275]	20	30	143-207
F22 Class 1	60 [415]	30 [205]	20	35	170max
F22 Class 3	75 [515]	45 [310]	20	30	156-207

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 speciÞcations.
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.