Steel SAF-690 (Severstal-690)

Designation

Name The value
Designation GOST Cyrillic СВС-690
Designation GOST Latin CBC-690
Transliteration SVS-690
By chemical elements СWС-690
Name The value
Designation GOST Cyrillic Северсталь-690
Designation GOST Latin Cebepctal-690
Transliteration Severstal-690
By chemical elements Северсталь-690

Description

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.

Note

High-strength, cold-resistant low-carbon weldable steel.

Standards

Name Code Standards
Classification, nomenclature and General rules В20 TU 14-105-874-09

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N Al V Mo Nb
TU 14-105-874-09 ≤0.12 ≤0.006 ≤0.02 1.99 ≤0.5 ≤0.6 1 Rest ≤0.35 ≤0.012 0.015-0.06 ≤0.15 ≤0.5 ≤0.15
Fe is the basis.
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.

Mechanical properties

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
6-50 ≥690 ≥770 ≥14 ≥392

Description mechanical marks

Name Description
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
KCU Toughness

Technological properties

Name The value
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.