SA540

SA540 Grades

SA540

SA540 Grades
B21 Chromium-Molybdenum-Vanadium , (Cr-Mo-V)
B22 Chromium-Molybdenum , (4142-H)
B23 Chromium-Nickel-Molybdenum , (E-4340-H)
B24 Chromium-Nickel-Molybdenum, (4340 Mod.)
B24V Chromium-Nickel-Molybdenum-Vanadium, (4340V Mod.)

SA540 Chemical Properties

GRADE / Elements B21 B22 B23 B24 B24V
Carbon 0.36-0.44 0.39-0.46 0.37-0.44 0.37-0.44 0.37-0.44
Manganese 0.45-0.70 0.65-1.10 0.60-0.95 0.70-0.90 0.60-0.95
Phosphorus, max 0.025c 0.025c 0.025c 0.025c 0.025c
Sulfur, max 0.025c 0.025c 0.025c 0.025c 0.025c
Silicon 0.15-0.35 0.15-0.35 0.15-0.35 0.15-0.35 0.15-0.35D
Chromium 0.80-1.15 0.75-1.20 0.65-0.95 0.70-0.95 0.60-0.95
Nickel ... ... 1.55-2.00 1.65-2.00 1.55-2.00
Molybdenum 0.50-0.65 0.15-0.25 0.20-0.30 0.30-0.40 0.40-0.60
Vanadium 0.25-0.35 ... ...   0.04-0.10

A. The intentional addition of Bi, Se, Te, and Pb is not permitted.

B. Unless otherwise specified, separate determinations may vary from the specified ranges, except that elements in any heat must not vary both above and below the specified range.

C. Phosphorus and sulfur content is 0.04 % max when open-hearth steel is specified.

D. Silicon content is 0.35 % max if vacuum-carbon deoxidized.

 

SA540 Mechanical Properties (inches)

Grade

Class

Diameter Tensile Strength,
min
Yield Strength, 0.2 % offset,min Elongation, min, % Reduction of Area, min, % Surface
Brinell
Hardness
Charpy V-Notch +10 °F [-12.2 °C]
in. ksi ksi In 2 in.   min max  

B21

5

Upto 2 120 105 15 50 241 285 Note 4
over 2 to 6, incl 115 100 15 50 248 302 Note 4
over 6 to 8, incl 115 100 15 50 255 311 Note 4

4

Upto 3 135 120 13 45 269 331 Note 4
over 3 to 6, incl 135 120 13 45 277 352 Note 4

3

Upto 3 145 130 12 40 293 352 Note 4
over 3 to 6, incl 145 130 12 40 302 375 Note 4
2 Upto 4 155 140 11 40 311 401 Note 4
1 Upto 4 165 150 10 35 321 429 Note 4

B22

5

to 2, incl 120 105 15 50 248 293 Note 1
over 2 to 4, incl 115 100 15 50 255 302 Note 4

4

to 1, incl 135 120 13 45 269 341 Note 1
over 1 to 4, incl 135 120 13 45 277 363 Note 4

3

to 2, incl 145 130 12 40 293 363 Note 4
over 2 to 4, incl 145 130 12 40 302 375 Note 4
2 to 3, incl 155 140 11 40 311 401 Note 4
1 to 11/2 , incl 165 150 10 35 321 401 Note 4

B23

5

to 6, incl 120 105 15 50 248 311 Note 1
over 6 to 8, incl 115 100 15 50 255 321 Note 1
over 8 to 91/2, incl 115 100 15 50 262 321 Note 4

4

to 3, incl 135 120 13 45 269 341 Note 1
over 3 to 6, incl 135 120 13 45 277 352 Note 1
over 6 to 91/2, incl 135 120 13 45 285 363 Note 4

3

to 3, incl 145 130 12 40 293 363 Note 2
over 3 to 6, incl 145 130 12 40 302 375 Note 2
over 6 to 91/2, incl 145 130 12 40 311 388 Note 4

2

to 3, incl 155 140 11 40 311 388 Note 4
over 3 to 6, incl 155 140 11 40 311 401 Note 4
over 6 to 91/2, incl 155 140 11 40 321 415 Note 4

1

to 3, incl 165 150 10 35 321 415 Note 4
over 3 to 6, incl 165 150 10 35 331 429 Note 4
over 6 to 8, incl 165 150 10 35 341 444 Note 4

B24

5

to 6, incl 120 105 15 50 248 311 Note 1
over 6 to 8, incl 115 100 15 50 255 321 Note 1
over 8 to 91/2, incl 115 100 15 50 262 321 Note 1

4

to 3, incl 135 120 13 45 269 341 Note 1
over 3 to 6, incl 135 120 13 45 277 352 Note 1
over 6 to 8, incl 135 120 13 45 285 363 Note 1
over 8 to 91/2, incl 135 120 13 45 293 363 Note 4

3

to 3, incl 145 130 12 40 293 363 Note 2
over 3 to 8, incl 145 130 12 40 302 388 Note 2
over 8 to 91/2, incl 145 130 12 40 311 388 Note 4

2

to 7, incl 155 140 11 40 311 401 Note 2
over 7 to 91/2, incl 155 140 11 40 321 415 Note 4

1

to 6, incl 165 150 10 35 321 415 Note 3
over 6 to 8, incl 165 150 10 35 331 429 Note 4

B24V

3

to 4, incl 145 130 12 40 293 363 Note 1
over 4 to 8, incl 145 130 12 40 302 375 Note 2
over 8 to 11, incl 145 130 12 40 311 388 Note 3

2

to 4, incl 155 140 11 40 311 388 Note 2
over 4 to 8, incl 155 140 11 40 311 401 Note 3
over 8 to 11, incl 155 140 11 40 321 415 Note 4

1

to 4, incl 165 150 10 35 321 415 Note 3
over 4 to 8, incl 165 150 10 35 331 429 Note 4
over 8 to 11, incl 165 150 10 35 331 444 Note 4

 

SA540 Mechanical Properties (Metric)

Grade

Class

Diameter Tensile Strength,
min
Yield Strength, 0.2 % offset,min Elongation, min, % Reduction of Area, min, % Surface
Brinell
Hardness
Charpy V-Notch +10 °F [-12.2 °C]
mm MPa MPa In 50 mm   min max  

B21

5

to 50, incl 825 725 15 50 241 285 Note 4
over 50 to 150, incl 795 690 15 50 248 302 Note 4
over 150 to 205, incl 795 690 15 50 255 311 Note 4

4

to 75, incl 930 825 13 45 269 331 Note 4
over 75 to 150, incl 930 825 13 45 277 352 Note 4

3

to 75, incl 1000 895 12 40 293 352 Note 4
over 75 to 150, incl 1000 895 12 40 302 375 Note 4
2 to 100, ind 1070 965 11 40 311 401 Note 4
1 to 100, ind 1140 1035 10 35 321 429 Note 4

B22

5

to 50, incl 825 725 15 50 248 293 Note 1
over 50 to 100, incl 795 690 15 50 255 302 Note 4

4

to 25, incl 930 825 13 45 269 341 Note 1
over 25 to 100, incl 930 825 13 45 277 363 Note 4

3

to 50, incl 1000 895 12 40 293 363 Note 4
over 50 to 100, incl 1000 895 12 40 302 375 Note 4
2 to 75, incl 1070 965 11 40 311 401 Note 4
1 to 38, incl 1140 1035 10 35 321 401 Note 4

B23

5

to 150, ind 825 725 15 50 248 311 Note 1
over 150 to 200 incl 795 690 15 50 255 321 Note 1
over 200 to 240, incl 795 690 15 50 262 321 Note 4

4

to 75, incl 930 825 13 45 269 341 Note 1
over 75 to 150, incl 930 825 13 45 277 352 Note 1
over 150 to 240, incl 930 825 13 45 285 363 Note 4

3

to 75, incl 1000 895 12 40 293 363 Note 2
over 75 to 150, incl 1000 895 12 40 302 375 Note 2
over 150 to 240, incl 1000 895 12 40 311 388 Note 4

2

to 75, incl 1070 965 11 40 311 388 Note 4
over 75 to 150, incl 1070 965 11 40 311 401 Note 4
over 150 to 240, incl 1070 965 11 40 321 415 Note 4

1

to 75, incl 1140 1035 10 35 321 415 Note 4
over 75 to 150, incl 1140 1035 10 35 331 429 Note 4
over 150 to 200, incl 1140 1035 10 35 341 444 Note 4

B24

5

to 150, ind 825 725 15 50 248 311 Note 1
over 150 to 200, incl 795 690 15 50 255 321 Note 1
over 200 to 240, incl 795 690 15 50 262 321 Note 1

4

to 75, incl 930 825 13 45 269 341 Note 1
over 75 to 150, incl 930 825 13 45 277 352 Note 1
over 150 to 200, incl 930 825 13 45 285 363 Note 1
over 200 to 240, incl 930 825 13 45 293 363 Note 4

3

to 75, incl 1000 895 12 40 293 363 Note 2
over 75 to 200, incl 1000 895 12 40 302 388 Note 2
over 200 to 240, incl 1000 895 12 40 311 388 Note 4

2

to 180, ind 1070 965 11 40 311 401 Note 2
over 180 to 240, incl 1070 965 11 40 321 415 Note 4

1

to 150, ind 1140 1035 10 35 321 415 Note 3
over 150 to 200, incl 1140 1035 10 35 331 429 Note 4

B24V

3

to 100, incl 1000 895 12 40 293 363 Note 1
over 100 to 200, incl 1000 895 12 40 302 375 Note 2
over 200 to 240, incl 1000 895 12 40 311 388 Note 3

2

to 100, ind 1070 965 11 40 311 388 Note 2
over 100 to 200, incl 1070 965 11 40 311 401 Note 3
over 200 to 280, incl 1070 965 11 40 321 415 Note 4

1

to 100, ind 1140 1035 10 35 321 415 Note 3
over 100 to 200, incl 1140 1035 10 35 331 429 Note 4
over 200 to 280, incl 1140 1035 10 35 331 444 Note 4