Steel SAF-690 (Severstal-690)
|Designation GOST Cyrillic||СВС-690|
|Designation GOST Latin||CBC-690|
|By chemical elements||СWС-690|
|Designation GOST Cyrillic||Северсталь-690|
|Designation GOST Latin||Cebepctal-690|
|By chemical elements||Северсталь-690|
Steel SAF-690 applies: for the production of sheet products with thickness from 6.0 to 50.0 mm, intended for the manufacture of platforms and other welded load-bearing sites of heavy trucks BelAZ.
High-strength, cold-resistant low-carbon weldable steel.
|Classification, nomenclature and General rules||В20||TU 14-105-874-09|
According to TU 14-105-874-09 the chemical composition is given for steel grade CBC-690 (Severstal-690). The content of the elements must be within or not more than indicated in the table. Provided that the mechanical properties of sheet metal are ensured, deviations in the content of elements in finished rolled products from the norms of chemical composition in accordance with GOST 19281 are allowed. The carbon equivalent should be no more than 0.55. The carbon equivalent of each melting is determined by the formula: C ECB = C + Mn / 6 + (Cr + Mo + V) / 5 + (Ni + Cu) / 15, where C, Mn, Cr, V, Mo, Ni, Cu - the content of the corresponding elements in the metal of this melting in the course of a smelting analysis or the analysis of finished rolled products.
|Section, mm||sT|s0,2, MPa||σU, MPa||d5, %||KCU, kJ/m2|
|The plates as supplied on the other 14-105-874-09. In the graph given the values of KCU KCU-70°C|
Description mechanical marks
|sT|s0,2||Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%|
|σU||Limit short-term strength|
|d5||Elongation after rupture|
|y||The relative narrowing|
|Weldability||Weldability of steel is guaranteed by the technology of its manufacture and chemical composition.|
|Particularities of production of goods||The leaves on the other 14-105-874-09 delivered in the state after controlled rolling, controlled rolling with accelerated cooling or heat treatment. A heat treatment process chooses the manufacturer.|