Les avantages de l’utilisation de tuyaux et de caissons en acier pour les applications industrielles
Exigences de traction et de dureté
| Note | |||||||||
| Contrainte d’élasticité MPa | Tension | Force Dureté | a,c Épaisseur de paroi spécifiée | Dureté admissible | Variante b | ||||
| Type | Élongation totale sous charge | min MPa | maximum | ||||||
| min | maximum | HRC | HBW | mm | HRC | H40 | |||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 0.5 | 276 | 552 | 414 | J55 | |||||
| 0.5 | 379 | 552 | 517 | K55 | |||||
| 0.5 | 379 | 552 | 655 | N80 | |||||
| 1 | 0.5 | 552 | 758 | 689 | N80 | ||||
| Q | 0.5 | 552 | 758 | 689 | R95 | ||||
| 0.5 | 655 | 758 | 724 | l80 L80 | |||||
| 1 | 0.5 | 552 | 655 | 655 | 23 | 241 | L80 | ||
| 9Cr 13Cr | 0.5 | 552 | 655 | 655 | 23 | 241 | |||
| 0.5 | 552 | 655 | 655 | 23 | 241 | C90 | |||
| 12.70 | 1 | 0.5 | 621 | 724 | 689 | 25.4 | 255 | 3 | |
| 12.71 au 19.04 | 4 | ||||||||
| 19h05 à 25h39 | 5 | ||||||||
| 25h40 | T95 | 6 | |||||||
| 12.70 | 1 | 0.5 | 655 | 758 | 724 | 25.4 | 255 | 3 | |
| 12.71 au 19.04 | 4 | ||||||||
| 19h05 à 25h39 | 5 | ||||||||
| 25h40 | C110 | 6 | |||||||
| 12.70 | 0.7 | 758 | 828 | 793 | 30 | 286 | 3 | ||
| 12.71 au 19.04 | 4 | ||||||||
| 19h05 à 25h39 | 5 | ||||||||
| 25h40 | P110 | 6 | |||||||
| 0.6 | 758 | 965 | 862 | Q125 | |||||
| b | 1 | 0.65 | 862 | 1034 | 931 | 12.70 | 3 | ||
| 12h71 au 19.04 19.05 | 4 | ||||||||
| a En cas de litige, les essais de dureté Rockwell C en laboratoire doivent être utilisés comme méthode d’arbitrage. | 5 | ||||||||
| b Aucune limite de dureté n’est spécifiée, mais la variation maximale est limitée à titre de contrôle de fabrication conformément à 7.8 et 7.9. | |||||||||
| c Pour les essais de dureté à travers la paroi des grades L80 (tous les types), C90, T95 et C110, les exigences indiquées dans l’échelle HRC concernent l’indice de dureté moyen maximum. | |||||||||
| c For through-wall hardness tests of Grades L80 (all types), C90, T95 and C110, the requirements stated in HRC scale are for maximum mean hardness number. | |||||||||
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