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ASTM B927 Specification

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

Scope

ASTM B927 specification establishes requirements for brass rod (round, hexagonal, and octagonal), bar (rectangular and square), and shapes of UNS Alloys C21000, C22000, C23000, C24000, C26000, C26800, C27000, C27400, and C27450.

Related Specifications of ASTM B927 Bolting

ASTM B927 Chemical Composition

UNS Nos. Sum of Results, Percent, Minimum
C21000, C22000, C23000, C24000 99.8
C26000, C26800, C27000, C27400 99.7
C27450 99.5
Copper Alloy UNS No. Composition, %
Copper Lead, max Iron, max Zinc
C21000 94.0-96.0 0.05 0.05 remainder
C22000 89.0-91.0 0.05 0.05 remainder
C23000 84.0-86.0 0.05 0.05 remainder
C24000 78.5-81.5 0.05 0.05 remainder
C26000 68.5-71.5 0.07 0.05 remainder
C26800 64.0-68.5 0.09 0.05 remainder
C27000 63.0-68.5 0.09 0.07 remainder
C27400 61.0-64.0 0.09 0.05 remainder
C27450 60.0-65.0 0.25 0.35 remainder

ASTM B927 Mechanical Requirements

Tensile Requirements (Inch-Pound Units)

Temper Diameter or Distance
Between Parallel
Surfaces, in		 Tensile Strength,
min		 Yield Strength at
0.5 % Extension
Under Load, min		 Elongation A in
4x diameter or
4x thickness, min
Code Name ksi ksi %
Copper Alloy UNS No. C21000 Rod (round, hexagonal, octagonal)
O60 Soft Anneal All sizes 30 10 25
H01 1 ⁄ 4  Hard Under 1 ⁄ 2 36 16 15
1 ⁄ 2  to 1, incl 34 14 17
over 1 32 12 19
H02 1 ⁄ 2  Hard Under 1 ⁄ 2 42 25 8
1 ⁄ 2  to 1, incl 40 23 9
over 1 37 20 11
H04 Hard Under 1 ⁄ 2 52 40 5
1 ⁄ 2  to 1, incl 48 37 7
over 1 to 2 incl 45 35 9
Copper Alloy UNS No. C21000 BarB
60 Soft Anneal All sizes 30 10 25
H01 1 ⁄ 4  Hard Under 1 ⁄ 2 34 14 17
1 ⁄ 2  to 2, incl 32 12 19
60 Soft Anneal All sizes 32 10 25
H01 1 ⁄ 4  Hard Under 1 ⁄ 2 39 20 15
1 ⁄ 2  to 1, incl 37 17 17
over 1 34 15 19
H02 1 ⁄ 2  Hard Under 1 ⁄ 2 50 30 7
1 ⁄ 2  to 1, incl 45 27 10
over 1 40 25 12
H04 Hard Under 1 ⁄ 2 57 40 5
1 ⁄ 2  to 1, incl 55 37 7
over 1 to 2 incl 50 35 9
Copper Alloy UNS No. C22000 BarB
60 Soft Anneal All sizes 30 10 25
H01 1 ⁄ 4  Hard Under 1 ⁄ 2 34 14 17
1 ⁄ 2  to 2, incl 32 12 19
O60 Soft Anneal All sizes 35 10 25
H01 1 ⁄ 4  Hard Under 1 ⁄ 2 44 20 15
1 ⁄ 2  to 1, incl 42 17 17
over 1 40 15 19
H02 1 ⁄ 2  Hard Under 1 ⁄ 2 50 30 7
1 ⁄ 2  to 1, incl 45 27 10
over 1 40 25 12
H04 Hard Under 1 ⁄ 2 63 40 5
1 ⁄ 2  to 1, incl 60 37 7
over 1 to 2 incl 58 35 9
Copper Alloy UNS No. C23000 BarB
O60 Soft Anneal All sizes 35 10 25
H01 1 ⁄ 4  Hard Under 1 ⁄ 2 40 15 19
1 ⁄ 2  to 1, incl 38 13 22
over 1 to 2 incl 36 11 25
H02 1 ⁄ 2  Hard Under 1 ⁄ 2 44 20 15
1 ⁄ 2  to 1, incl 42 17 17
over 1 to 2 incl 40 15 19
Copper Alloy UNS No. C24000 Rod (round, hexagonal, octagonal)
O60 Soft Anneal All sizes 40 10 30
H01 1 ⁄ 4  Hard Under 1 ⁄ 2 47 25 18
1 ⁄ 2  to 1, incl 45 20 20
over 1 43 18 22
H02 1 ⁄ 2  Hard Under 1 ⁄ 2 53 33 10
1 ⁄ 2  to 1, incl 48 30 13
over 1 43 28 15
H04 Hard Under 1 ⁄ 2 68 45 8
1 ⁄ 2  to 1, incl 65 40 10
over 1 to 2 incl 60 35 12
Copper Alloy UNS No. C24000 BarB
O60 Soft Anneal All sizes 40 10 30
H01 1 ⁄ 4  Hard Under 1 ⁄ 2 45 20 20
1 ⁄ 2  to 1, incl 43 18 22
over 1 to 2 incl 41 16 25
Copper Alloy UNS No. C26000 Rod (round, hexagonal, octagonal)
O60 Soft Anneal All sizes 40 12 30
H01 1 ⁄ 4  Hard Under 1 ⁄ 2 50 30 20
1 ⁄ 2  to 1, incl 48 25 24
over 1 46 20 28
H02 1 ⁄ 2  Hard Under 1 ⁄ 2 57 35 15
1 ⁄ 2  to 1, incl 54 32 20
over 1 50 30 25
H04 Hard Under 1 ⁄ 2 70 50 10
1 ⁄ 2  to 1, incl 65 45 15
over 1 to 2 incl 60 40 20
Copper Alloy UNS No. C26000 BarB
O60 Soft Anneal All sizes 40 12 30
H02 1 ⁄ 2  Hard Under 1 ⁄ 2 50 25 10
1 ⁄ 2  to 1, incl 45 17 20
over 1 to 2 incl 40 15 20
Copper Alloy UNS No. C26800, C27000, C27400, C27450 Rod (round, hexagonal, octagonal)
O60 Soft Anneal All sizes 40 12 30
H01 1 ⁄ 4  Hard Under 1 ⁄ 2 47 25 18
1 ⁄ 2  to 1, incl 45 20 20
over 1 43 18 22
H02 1 ⁄ 2  Hard Under 1 ⁄ 2 53 33 10
1 ⁄ 2  to 1, incl 48 30 13
over 1 43 28 15
H04 Hard Under 1 ⁄ 2 68 45 8
1 ⁄ 2  to 1, incl 65 40 10
over 1 to 2 incl 60 35 12
Copper Alloy UNS No. C26800, C27000, C27400, C27450 BarB
O60 Soft Anneal All sizes 40 12 30
1 ⁄ 2  Hard Under 1 ⁄ 2 50 25 10
1 ⁄ 2  to 1, incl 45 17 20
over 1 to 2 incl 40 15 20
  • A In any case, a minimum gage length of 1 in. shall be used.
    B For rectangular bar, the Distance Between Parallel Surfaces refers to thickness

Tensile Requirements (SI Units)

Temper Diameter or Distance
Between Parallel
Surfaces, in		 Tensile Strength,
min		 Yield Strength at
0.5 % Extension
Under Load, min		 Elongation A in
4x diameter or
4x thickness, min
Code Name ksi ksi %
Copper Alloy UNS No. C21000 Rod (round, hexagonal, octagonal)
O60 Soft Anneal All sizes 205 70 25
H01 1 ⁄ 4  Hard Under 12 250 110 15
12 to 25, incl 235 95 17
over 25 220 85 19
H02 1 ⁄ 2  Hard Under 12 290 170 8
12 to 25, incl 275 160 9
over 25 255 140 11
H04 Hard Under 12 360 275 5
12 to 25, incl 330 255 7
over 25 to 50 incl 310 240 9
Copper Alloy UNS No. C21000 BarB
O60 Soft Anneal All sizes 205 70 25
H01 1 ⁄ 4  Hard Under 12 235 95 17
12 to 50, incl 220 85 19
Copper Alloy UNS No. C22000 Rod (round, hexagonal, octagonal)
60 Soft Anneal All sizes 220 70 25
H01 1 ⁄ 4  Hard Under 12 270 140 15
12 to 25, incl 255 115 17
over 25 235 105 19
H02 1 ⁄ 2  Hard Under 12 345 205 7
12 to 25, incl 310 185 10
over 25 275 170 12
H04 Hard Under 12 395 275 5
12 to 25, incl 380 255 7
over 25 to 50 incl 345 240 9
Copper Alloy UNS No. C22000 BarB
O60 Soft Anneal All sizes 220 70 25
H01 1 ⁄ 4  Hard Under 12 240 110 17
12 to 50, incl 235 105 19
Copper Alloy UNS No. C23000 Rod (round, hexagonal, octagonal)
O60 Soft Anneal All sizes 240 70 25
H01 1 ⁄ 4  Hard Under 12 305 140 15
12 to 25, incl 290 115 17
over 25 275 103 19
H02 1 ⁄ 2  Hard Under 12 345 205 7
12 to 25, incl 310 185 10
over 25 275 170 12
H04 Hard Under 12 435 275 5
12 to 25, incl 415 255 7
over 25 to 50 incl 400 240 9
Copper Alloy UNS No. C23000 BarB
O60 Soft Anneal All sizes 240 70 25
H01 1 ⁄ 4  Hard Under 12 275 105 19
12 to 25, incl 260 90 22
over 25 to 50 incl 250 75 25
H02 1 ⁄ 2  Hard Under 12 305 140 15
12 to 25, incl 290 115 17
over 25 to 50 incl 275 105 19
Copper Alloy UNS No. C24000 Rod (round, hexagonal, octagonal)
O60 Soft Anneal All sizes 275 70 30
H01 1 ⁄ 4  Hard Under 12 325 170 18
12 to 25, incl 310 140 20
over 25 295 125 22
H02 1 ⁄ 2  Hard Under 12 365 230 10
12 to 25, incl 330 205 13
over 25 295 195 15
H04 Hard Under 12 470 310 8
12 to 25, incl 450 275 10
over 25 to 50 incl 415 240 12
Copper Alloy UNS No. C24000 BarB
O60 Soft Anneal All sizes 275 70 30
H01 1 ⁄ 4  Hard Under 12 310 140 20
12 to 25, incl 295 125 22
over 25 to 50 incl 285 110 25
Copper Alloy UNS No. C26000 Rod (round, hexagonal, octagonal)
O60 Soft Anneal All sizes 275 85 30
H01 1 ⁄ 4  Hard Under 12 345 205 20
12 to 25, incl 330 170 24
over 25 315 140 28
H02 1 ⁄ 2  Hard Under 12 395 240 15
12 to 25, incl 370 220 20
over 25 345 205 25
H04 Hard Under 12 485 345 10
12 to 25, incl 450 310 15
over 25 to 50 incl 415 275 20
Copper Alloy UNS No. C26000 BarB
O60 Soft Anneal All sizes 275 85 30
H02 1 ⁄ 2  Hard Under 12 345 170 10
12 to 25, incl 310 115 20
over 25 to 50 incl 275 105 20
Copper Alloy UNS No. C26800, C27000, C27400, C27450 Rod (round, hexagonal, octagonal)
O60 Soft Anneal All sizes 275 85 30
H01 1 ⁄ 4  Hard Under 12 325 170 18
12 to 25, incl 310 140 20
over 25 295 125 22
H02 1 ⁄ 2  Hard Under 12 365 230 10
12 to 25, incl 330 205 13
over 25 295 195 15
H04 Hard Under 12 470 310 8
12 to 25, incl 450 275 10
over 25 to 50 incl 415 240 12
Copper Alloy UNS No. C26800, C27000, C27400, C27450 BarB
O60 Soft Anneal All sizes 275 85 30
H02 1 ⁄ 2  Hard Under 12 345 170 10
12 to 25, incl 310 115 20
over 25 to 50 incl 275 105 20
  • A In any case, a minimum gage length of 25 mm shall be used.
    B For rectangular bar, the Distance Between Parallel Surfaces refers to thickness

ASTM B927 Bolting 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