ASTM A 792 – 10(2015)
La Société Américaine pour les Essais et les Matériaux (ASTM) est un organisme international de normalisation qui élabore et publie des normes techniques consensuelles et volontaires pour un large éventail de matériaux, produits, systèmes et services. La norme ASTM A 792-10 (2015) est la dernière norme ASTM mise à jour qui définit les spécifications standard pour les tôles d’acier revêtues d’un d’alliage 55% aluminium-zinc par immersion à chaud.
La Composition chimique
| CLASSIFICATION | TYPE | Composition chimique ( values are in %)max | ||||||||||||
| C | Mn | P | S | Al | Cu | Ni | Cr | Mo | V | Cb | Ti | N | ||
| ASTM A653 | CS type A | 0.10 | 0.60 | 0.030 | 0.035 | – | 0.20 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | – |
| CS type B | 0.02 -0.15 | 0.60 | 0.030 | 0.035 | – | 0.20 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | – | |
| CS type C | 0.08 | 0.60 | 0.100 | 0.035 | – | 0.20 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | – | |
| FS | 0.02-0.10 | 0.50 | 0.020 | 0.030 | – | 0.20 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | – | |
| DS | 0.06 | 0.50 | 0.020 | 0.025 | 0.01 min | 0.20 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | – | |
| HTS | 0.02 -0.15 | 0.60 | 0.040 min | 0.035 | – | 0.20 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | – | |
| SS-gr 230/Gr A/ Gr 33 | 0.20 | 1.15 | 0.04 | 0.04 | – | 0.20 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | – | |
| SS-gr 255/Gr B/ Gr 37 | 0.20 | 1.15 | 0.10 | 0.04 | – | 0.20 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | – | |
| SS-gr 275/Gr C/ Gr 40 | 0.25 | 1.15 | 0.10 | 0.04 | – | 0.20 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | – | |
| SS-gr 340 C1/Gr D/ Gr 50 | 0.25 | 1.15 | 0.20 | 0.04 | – | 0.20 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | – | |
| SS-gr 340 C2/Gr E/ Gr 50 | 0.25 | 1.15 | 0.20 | 0.04 | – | 0.20 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | – | |
| SS-gr 340 C4/Gr F/ Gr 50 | 0.25 | 1.15 | 0.20 | 0.04 | – | 0.20 | 0.20 | 0.15 | 0.06 | 0.008 | 0.008 | 0.025 | – | |
| SS-gr 550/Gr E/ Gr 80 | 0.20 | 1.15 | 0.04 | 0.04 | – | 0.20 | 0.20 | 0.15 | 0.06 | 0.008 | 0.015 | 0.025 | – | |
Les intervalles typiques de propriétés mécaniques
| CLASSIFICATION | TYPE | LIMITE D’ELASTICITE
(Mpa) |
RESISTANCE A LA TRACTION (Mpa) | élongation
2 in. (50 mm)min, % |
| ASTM A792 | cs type a | 205/410 | – | ≥20 |
| cs type b | 245/410 | – | ≥20 | |
| cs type c | 205/450 | – | ≥15 | |
| fs | 170/275 | – | ≥24 | |
| ds | 140/240 | – | ≥30 | |
| hts | 205/450 | – | ≥15 | |
| ss-gr 230/Gr A/ Gr 33 | 230min | 310min | 20 | |
| ss-gr 255/Gr B/ Gr 37 | 255min | 360min | 18 | |
| ss-gr 275/Gr C/ Gr 40 | 275min | 280min | 16 | |
| ss-gr 340 C1/Gr D/ Gr 50 | 340min | 450min | 12 | |
| ss-gr 340 C2/Gr E/ Gr 50 | 340min | – | 12 | |
| ss-gr 340 C4/Gr F/ Gr 50 | 340min | 410min | 12 | |
| ss-gr 550/Gr E | 550min | 570min | – |
