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Know all Grades and Composition and major Differences between High Alloy Steel Vs Low Alloy Steel by Aesteiron Steels LLP, one of the oldest company in India established 2007. High Strength Low Alloy (HSLA) also known as Microalloyed steels. High Alloy Steel structural material is manufactured with low alloy content. Low Alloy Steel are hardened to enhance their strength.
Low Alloy Steel and High Alloy Steel Grades at a Glance
| High Strength Low Alloy (HSLA) Plates/ Low Alloy Plate |
|
High Strength Low Alloy (HSLA) material applications
Galvanizing Standard of Hot rolled HSLA Steel
| European and British Standards | |
|---|---|
| EN ISO 10684 | Hot dip galvanized Fasteners |
| EN 15773 | hot dip galvanized and powder organic coating |
| EN ISO 14713-1/ EN ISO 14713-2 | Zinc Coating |
| EN ISO 1461 | Hot dip galvanized coating |
| EN 13438 | Powder organic coating |
| EN 10348‑2/ EN 10080 | Galvanized reinforcing steel |
Different Types of Cold Rolled High and higher Strength Steel
| High-Strength IF Steels (Y) (DIN EN 10 268) | CR180IF | HC180Y | DIN 1.0922 |
| CR210IF | HC220Y | DIN 1.0925 | |
| CR240IF | HC260Y | DIN 1.0928 | |
| Micro-alloyed steel | CR240LA | HC260LA | EN 1.0480 |
| CR270LA | HC300LA | EN 1.0489 | |
| CR300LA | HC340LA | EN 1.0548 | |
| CR340LA | HC380LA | EN 1.0550 | |
| CR380LA | HC420LA | EN 1.0556 | |
| CR420LA | HC460LA | EN 1.0574 | |
| - | HC500LA | EN 1.0573 | |
| Carbon-Manganese Steel | |||
| Bake-hardening steel | |||
| Phosphorus-Alloyed Steel | |||
| Surface Type A | |||
| Surface Type B |
Hot-rolled micro- alloy steel Plates as per DIN EN 10149-2
| Grade | WNR | Other |
|---|---|---|
| S315MC | EN 1.0972 | QStE340TM |
| S355MC | EN 1.0976 | QStE380TM |
| S420MC | EN 1.0980 | QStE420TM |
| S460MC | EN 1.0982 | QStE460TM |
| S500MC | EN 1.0984 | QStE500TM |
| S550MC | EN 1.0986 | QStE550TM |
| S600MC | EN 1.8969 | QStE600TM |
| S650MC | EN 1.8976 | QStE650TM |
| S700MC | EN 1.7974 | QStE690TM |
| S900MC | EN 1.8798 | |
| S960MC | EN 1.8799 |
Micro-alloyed grades of VDA and Tata Steel
| VDA (L - longitudinal test direction) |
Tata Steel | EN 10268 (L - longitudinal test direction) | EN 10268 +A1:2013 (T - transverse test direction) |
|---|---|---|---|
| CR210LA | HSLA220 | - | - |
| CR240LA | HSLA260 | H240LA | HC260LA |
| CR270LA | HSLA300 | H280LA | HC300LA |
| CR300LA | HSLA340 | H320LA | HC340LA |
| CR340LA | HSLA380 | H360LA | HC380LA |
| CR380LA | HSLA420 | H400LA | HC420LA |
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