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	s_T\|s_0,2, MPa	σ_U, 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
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	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.

Steel SAF-690 (Severstal-690)

Designation