Prezoane dublu filetate :
Prezoane complet filetate :
Suruburi si bolturi hexagonale :
Piulite hexagonale :
Saibe :
Materiale utilizate
Piulite hexagonale – marcaj si proprietati mecanice
Marcaj de identificare a gradului | Specificatie | Material | Dimensiuni | Proof Load Stress, ksi | Hardness Rockwell | |
Min | Max | |||||
ASTM A194 Grad 2 | Otel carbon | ¼’’ - 4’’ | 150 | 159 | 352 | |
ASTM | Otel carbon , calit si revenit | ¼’’ - 4’’ | 175 | C24 | C38 | |
ASTM A194 Grad 2HM | Otel carbon, Calit si revenit | ¼’’ - 4’’ | 150 | 159 | 237 | |
ASTM A194 Grad 4 | Otel slab/mediu aliat, calit si revenit | ¼’’ - 4’’ | 175 | C24 | C38 | |
ASTM A194 Grad 7 | Otel slab/mediu aliat, calit si revenit | ¼’’ - 4’’ | 175 | C24 | C38 | |
ASTM A194 Grad 7M | Otel slab/mediu aliat, calit si revenit | ¼’’ - 4’’ | 150 | 159 | 237 | |
ASTM A194 Grad 8 | Inox AISI 304 | ¼’’ - 4’’ | 80 | 126 | 300 | |
ASTM A194 Grad 8M | Inox AISI 316 | ¼’’ - 4’’ | 80 | 126 | 300 |
Suruburi si prezoane
Grupa
B7 | Otel mediu aliat, AISI 4140/4142, calit si reveni |
B8 | Clasa 1 inox, AISI 304 |
B8M | Clasa 1 inox, AISI 316 |
B8 | Clasa 2 inox, AISI 304, durificat |
B8M | Clasa 2 inox, AISI 316, durificat |
Proprietati mecanice
Grupa | Dimensiune | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min |
B7 | pana la 2 ½’’ | 125 | 105 | 16 | 50 |
de la 2 ⅝’’ – 4’’ | 115 | 95 | 16 | 50 | |
4 ⅛’’ - 7’’ | 100 | 75 | 18 | 50 | |
B8 Clasa 1 | Toate | 75 | 30 | 30 | 50 |
B8M Clasa 1 | Toate | 75 | 30 | 30 | 50 |
B8 Clasa 2 | pana la ¾’’ | 125 | 100 | 12 | 35 |
⅞’’ - 1’’ | 115 | 80 | 15 | 35 | |
1 ⅛’’ – 1 ¼’’ | 105 | 65 | 20 | 35 | |
1 ⅜’’ – 1 ½’’ | 100 | 50 | 28 | 45 | |
B8M Clasa 2 | pana la ¾’’ | 110 | 95 | 15 | 45 |
⅞’’ - 1’’ | 100 | 80 | 20 | 45 | |
1 ⅛’’ – 1 ¼’’ | 95 | 65 | 25 | 45 | |
1 ⅜’’ – 1 ½’’ | 90 | 50 | 30 | 45 |