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721 Quality Sheet Specification
Hot rolled unalloyed structural steels for manufacture of construction equipment, machines and various machine parts, general construction plates, road and railway vehicles
AlternativesThere is no alternative to this sheet.
Flat / Hot Rolled
Flat steel products are obtained by heating semi-finished products with a rectangular cross-section (slab), which are produced by the continuous casting method, to a specific temperature and then rolling them, with thicknesses ranging from 1.40 to 25.40 mm and widths ranging from 700 to 2025 mm, produceed as coil or by cutting/slit-coiling flat steel products from coils.
Hot rolled unalloyed structural steels for manufacture of construction equipment, machines and various machine parts, general construction plates, road and railway vehicles
Chemical Composition (%)
| Standard Equivalent | Erdemir Grade No | Cmin. | Cmax. | Mnmin. | Mnmax. | Pmax. | Smax. | Simax. | |
|---|---|---|---|---|---|---|---|---|---|
| Standard | Quality | ||||||||
| 400-240-004-D | 18MN5 | 721 | 0.15 | 0.20 | 1.20 | 1.50 | 0.025 | 0.025 | 0.40 |
- Grade specified on the table, is produced within the framework of agreements with customers.
Mechanical Properties
| Standard Equivalent | Erdemir Grade No | Re [N/mm2] | Rm [N/mm2] | A(%) min. t(thickness, mm) | ||
|---|---|---|---|---|---|---|
| Standard | Quality | |||||
| A802.1≤t≤2.99 | A53≤t≤5.5 | |||||
| 400-240-004-D | 18MN5 | 721 | 355 min. | 470-620 | 20 | 20 |
- Tensile test values apply to "transverse" test pieces