ASTM A336 Specification

Forgings, Fasteners, Boltings, Stud Bolts, Screws, Nuts

Scope

ASTM A336 specification covers ferritic steel forgings for boilers, pressure vessels, high-temperature parts, and associated equipment.
Forgings made of steel grades listed in Specification A 335/A 335M, may also be ordered under this specification. The chemical, tensile, heat treatment, and marking requirements of Specification A 335/A 335M shall apply, except the forging shall conform to the chemical requirements of Tables 1 and 2 of Specification A 335/A 335M only with respect to heat analysis. On check analysis they may deviate from these limits to the extent permitted in Table 1 of this specification
Supplementary Requirements S1 to S9 are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.
Unless the order specifies the applicable “M” specification designation, the material shall be furnished to the inchpound units.

Related Specifications of ASTM A336

ASTM A336 Chemical Composition

Grade Element
C Mn P, max S, max Si Ni Cr Mo V Cu N Nb Al B W Ti Ca Zr
ASTM A336 Grade F1 0.20-0.30 0.60-0.80 0.025 0.025 0.20-0.35 ... ... 0.40-0.60 ... ... ... ... ... ... ... ... ... ...
ASTM A336 Grade F11,  Classes 2 and 3 0.10-0.20 0.30-0.80 0.025 0.025 0.50-1.00 ... 1.00-1.50 0.45-0.65 ... ... ... ... ... ... ... ... ... ...
ASTM A336 Grade F11, Class 1 0.05-0.15 0.30-0.60 0.025 0.025 0.50-1.00 ... 1.00-1.50 0.44-0.65 ... ... ... ... ... ... ... ... ... ...
ASTM A336 Grade F12  0.10-0.20  0.30-0.80 0.025 0.025  0.10-0.60 ...  0.80-1.10  0.45-0.65 ... ... ... ... ... ... ... ... ... ...
ASTM A336 Grade F5B 0.15 max 0.30 -  0.60 0.025 0.025 0.50 max 0.50 max 4.0 - 6.0 0.45 -  0.65 ... ... ... ... ... ... ... ... ... ...
ASTM A336 Grade F5AB 0.25 max 0.60 max 0.025 0.025 0.50 max 0.50 max 4.0- 6.0 0.45-  0.65 ... ... ... ... ... ... ... ... ... ...
ASTM A336 Grade F9 0.15 max 0.30- 0.60 0.025 0.025 0.50- 1.00 ... 8.0-10.0 0.90- 1.10 ... ... ... ... ... ... ... ... ... ...
ASTM A336 Grade F6 0.12 max 1.00 max 0.025 0.025 1.00 max 0.50 max 11.5-  13.5 ... ... ... ... ... ... ... ... ... ... ...
ASTM A336 Grade F6NM 0.05 max 0.50-  1.00 0.02 0.015 0.60 max 3.5- 5.5 11.5- 14 0.50-  1.00 ... ... ... ... ... ... ... ... ... ...
ASTM A336 Grade F21, Classes 1 and 3 0.05-0.15 0.30-0.60 0.025 0.025 0.50 max ... 2.7-3.3 0.80-1.06 ... ... ... ... ... ... ... ... ... ...
ASTM A336 Grade F22, Classes 1 and 3 0.05-0.15 0.30-0.60 0.025 0.025 0.50 max ... 2.00-2.50 0.90-1.10 ... ... ... ... ... ... ... ... ... ...
ASTM A336 Grade F91 0.08-0.12 0.30-0.60 0.025 0.025 0.20-0.50 0.40 max 8.0-9.5 0.85-1.05 0.18-0.25 ... 0.03-0.07 0.06-0.10 0.02 maxC ... ... 0.01 maxC ... 0.01 maxC
ASTM A336 Grade F911 0.09-0.13 0.30-0.60 0.02 0.01 0.10-0.50 0.40 max 8.5-9.5 0.90-1.10 0.18-0.25 ... 0.04-0.09 0.06-0.10 0.02 maxC 0.0003-0.006 0.90-1.10 0.01 maxC ... 0.01 maxC
ASTM A336 Grade F92 0.07-0.13 0.30-0.60 0.02 0.01 0.5 0.4 8.50-9.50 0.30-0.60 0.15-0.25 ... 0.030-0.070 0.04-0.09 0.02 0.001-0.006 1.50-2.00 0.01 ... 0.01
ASTM A336 Grade F3V 0.10-0.15 0.30-0.60 0.02 0.02 0.10 max ... 2.7-3.3 0.90-1.10 0.20-0.30 ... ... ... ... 0.001-0.003 ... 0.015-0.035 ... ...
ASTM A336 Grade F3VCb 0.10-0.15 0.30-0.60 0.02 0.01 0.10 max 0.25 max 2.7-3.3 0.90-1.10 0.20-0.30 0.25 max ... 0.015-0.070 ... ... ... 0.015 max 0.0005-0.0150 ...
ASTM A336 Grade F22V 0.11-0.15 0.30-0.60 0.015 0.01 0.10 max 0.25 max 2.00-2.50 0.90-1.10 0.25-0.35 0.20 max ... 0.07 max ... 0.0020 max ... 0.030 max 0.015 maxD ...
  • A The present Grade F 5A (0.25 %, maximum carbon) previous to 1955 was assigned the identification symbol F 5. Identification symbol F 5 has been assigned to the 0.15 %, maximum, carbon grade to be consistent with ASTM specifications for other products such as pipe, tubing, bolting, welding, fittings, etc.
    B For Grade F 22V, rare earth metals (REM may be added in place of calcium subject to agreement between the producer and the purchaser. In that case the total amount of REM shall be determined and reported.
    † Editorially corrected.

ASTM A336 Mechanical Requirements

Grade Tensile strength, ksi [MPa] Yield strength, min, ksi [MPa] Elongation in 2 in. or 50 mm, min, % Reduction of area, min, %
ASTM A336 Grade F1 70-95 [485-660] 40 [275] 20 40
ASTM A336 Grade F11, Class 2 70-95 [485-660] 40 [275] 20 40
ASTM A336 Grade F11, Class 3 75-100 [515-690] 45 [310] 18 40
ASTM A336 Grade F11, Class 1 60-85 [415-585] 30 [205] 20 45
ASTM A336 Grade F12 70-95 [485-660] 40 [275] 20 40
ASTM A336 Grade F5 60-85 [415-585] 36 [250] 20 40
ASTM A336 Grade F5A 80-105 [550-725] 50 [345] 19 35
ASTM A336 Grade F9 85-110 [585-760] 55 [380] 20 40
ASTM A336 Grade F6 85-110 [585-760] 55 [380] 18 35
ASTM A336 Grade F6NM 115-140 [790-965] 90 [620] 15 45
ASTM A336 Grade F21, Class 3 75-100 [515-690] 45 [310] 19 40
ASTM A336 Grade F21, Class 1 60-85 [415-585] 30 [205] 20 45 
ASTM A336 Grade F22, Class 3 75-100 [515-690] 45 [310] 19 40
ASTM A336 Grade F22, Class 1 60-85 [415-585] 30 [205] 20 45
ASTM A336 Grade F91 90-110 [620-760] 60 [415] 20 40
ASTM A336 Grade F911 90-120 [620-830] 64 [440] 20 40
ASTM A336 Grade F92 90-120 [620-830] 64 [440] 20 45
ASTM A336 Grade F3V 85-110 [585-760] 60 [415] 18 45
ASTM A336 Grade F3VCb 85-110 [585-760] 60 [415] 18 45
ASTM A336 Grade F22V 85-110 [585-760] 60 [415] 18 45

ASTM A336 Heat Treatment

The steel forgings shall be annealed or normalized and tempered but alternatively may be liquid quenched and tempered when mutually agreed upon between the manufacturer and the purchaser. Grade F22V forgings shall be normalized and tempered or liquid quenched and tempered. For Grade F22V forgings the minimum austenizing temperature shall be 1650°F [900°C]. For Grade F91 and F911 forgings the austenitizing temperature shall be in the range of 1900 to 2000°F [1040 to 1095°C]. Normalizing or liquid quenching shall be followed by tempering at a subcritical temperature. The minimum tempering temperature shall be 1100°F [595°C], except for the following grades:

Grade Minimum Tempering Temperature, °F [°C]
ASTM A336 Grade F6 1150 [620]
ASTM A336 Grade F11, Class 2 1150 [620]
ASTM A336 Grade F11, Class 3 1150 [620]
ASTM A336 Grade F11, Class 1 1150 [620]
ASTM A336 Grade F5 1250 [675]
ASTM A336 Grade F9 1250 [675]
ASTM A336 Grade F21, Class 1 1250 [675]
ASTM A336 Grade F3V, F3VCb 1250 [675]
ASTM A336 Grade F22, Class 1 1250 [675]
ASTM A336 Grade F22V 1250 [675]
ASTM A336 Grade F91 1350 [730]
ASTM A336 Grade F911 1350 [730]

ASTM A336 Certifications

  • EN 10204 3.1
  • EN 10204 3.2
  • PED 2014/68/EC
  • MERKBLATT AD 2000 W2/W7/W10
  • API 20 E BSL 1/ BSL 2
  • NACE MR 0175
  • NACE MR 0103

ASTM A336 Supplementary Requirements

S1 Rough Turning and Boring
S2 Transverse Tension Test
S3 Alternative Test Specimen Requirements
S4 Hydrostatic Test
S6 Liquid Penetrant Examination
S7 Marking
S8 Forging Requirements
S9 Individual Forging