Grau Especificao Materialfaixa de

tamanhos

nominais

Faixa de

Temperatura

de servio

Porcas

recomendadas

ASTM / Grau

Grade Specification MaterialNominal size

range

Service Temp.

Range

Suitable Nuts

ASTM/Grade

psi Mpa psi Mpa C

B5 ASTM A 193 B5 AISI 501 1/4 - 4 80000 552 100000 689 at (up to) 815 A 194 Gr 3

B6 ASTM A 193 B6 AISI 410 85000 586 110000 758 at (up to) 450 A 194 Gr 6

B7 ASTM A 193 B7AISI 4140, 4142,

4105

105000

95000

75000

724

655

517

125000

115000

100000

862

793

689

0 - 480 A 194 Gr 2H

B16 ASTM A 193 B16CrMoVa ao liga

(alloy steel)

AISI 4140M

105000

95000

85000

724

655

586

125000

115000

100000

862

793

689

0 - 550 A 194 Gr 4

B8 ASTM A 193 B8 AISI 304 (-200) - 650 A 194 Gr B8

B8C ASTM A 193 B8C AISI 347 (-200) - 650 A 194 Gr B8C

B8M ASTM A 193 B8M AISI 316 (-200) - 750 A 194 Gr B8M

B8T ASTM A 193 B8T AISI 321 1/4 and larger 30000 207 75000 517 (-200) - 650 A 194 Gr BT6

B8 ASTM A 193 B8AISI 304 strain

hardnedA 194 Gr B8

B8C ASTM A 193 B8CAISI 347 strain

hardenedA 194 Gr B8C

B8M ASTM A 193 B8MAISI 316 strain

hardened

95000

80000

65000

60000

655

552

448

345

110000

100000

95000

90000

758

689

655

621

A 194 Gr B8M

B8T ASTM A 193 B8TAISI 321 strain

hardned

100000

80000

65000

50000

689

552

448

345

125000

115000

105000

100000

862

793

724

689

A 194 Gr BT6

percentual

range %

Carbono Carbon 0.38-0.48

Manganes Manganese 0.750-1.00

Fsforo (max) Phosphorus 0.04

Enxfre (max) Sulphur 0.04

Silicio Silicon 0.20-0.35

Cromo Chromium 0.80-1.10

Molibdnio Molybdenum 0.15-0.25

Carbono Carbon 0.36-0.44

Manganes Manganese 0.45-0,70

Fsforo (max) Phosphorus 0.04

Enxfre (max) Sulphur 0.04

Silicio Silicon 0.20-0.35

Cromo Chromium 0.80-1.15

Molibdnio Molybdenum 0.50-0.65

Vanadio Vanadium 0,25-0,35

M U 2 2

PARAFUSOS ASTM A 193 - PROPRIEDADES DOS MATERIAIS, TEMPERATURA DE SERVIO E PORCAS RECOMENDADAS

BOLTS AND STUDS ASTM A 193 - MATERIALS PROPERTIES, SERVICE TEMPERATURE AND SUITABLE NUTS

0.05

0.03

Elemento qumico

Chemical element

1/4 - 2,1/2

>2.1/2 - 4

>4 - 7

30000 207

1/4-3/4

3/4-1

1 - 1.1/4

1.1/4 - 1.1/2

1/4 and larger

1/4-3/4

3/4-1

1 - 1.1/4

1.1/4 - 1.1/2

100000

80000

65000

50000

689

552

448

345

Tenso

escoamentoResit. trao

0,03

ASTM A 193 GR B7

ASTM A 193 B160,02

0,03

0.005 over

0.005 over

0.02

0.005 over

0.02

0.05

0.02

0,04

0.005 over

Tensile Strength minYeld streng min

517

variao para mais ou

para menos

check variation over and

under %

0,02

125000

115000

105000

100000

862

793

724

689

75000

tEtEtEtE