Steel S285
	
	
Designation
	
		
			| Name | 
			The value | 
		
	
	
		
			| Designation GOST Cyrillic | 
			С285 | 
		
		
			| Designation GOST Latin | 
			C285 | 
		
		
			| Transliteration | 
			S285 | 
		
		
			| The chemical elements | 
			- | 
		
	
	Description
	S285 steel is used: for the manufacture of hot-rolled structural shapes (angles, I-beams, channels), sheet, universal broadband rental and roll-formed profiles designed for construction of steel structures with welded and other connections.
Standards
	
		
			| Name | 
			Code | 
			Standards | 
		
	
	
		
	| Classification, nomenclature and general norms | 
	В20 | 
	GOST 27772-88 | 
	
Chemical composition
	
		
			| Standard | 
			
C | 
 
S | 
 
P | 
 
Mn | 
 
Cr | 
 
Si | 
 
Ni | 
 
Fe | 
 
Cu | 
 
N | 
 
As | 
		
	
	
		
	| GOST 27772-88 | 
	
≤0.22 | 
≤0.05 | 
≤0.04 | 
≤0.65 | 
≤0.3 | 
0.15-0.3 | 
≤0.3 | 
The rest | 
≤0.3 | 
≤0.008 | 
≤0.08 | 
	
Fe is the basis. 
 According to GOST 27772-88 for steel smelted in electric furnaces, the content of N ≤ 0.012% is allowed. In steel, an increase in the mass fraction of manganese to 0.085% is permissible. It is allowed to change the chemical composition at the manufacturer's choice: the Mn content is 0.80-1.10%, while the Si content is 0.05-0.15%; the C content ≤ 0.20% and Mn = 0.80-1.10, with a Si content of 0.15-0.30%. Mass fraction of residual (acid-soluble) aluminum in C285 steel with a manganese content up to 0.85% and silicon 0.15-0.30%, intended for sheet and broadband universal rolled products, should be at least 0.020%.
Mechanical characteristics
	
		
			
| Section, mm | 
 
sT|s0,2, MPa | 
 
σB, MPa | 
 
d5, % | 
 
kJ/m2, кДж/м2 | 
		
	
	
		
	| Plates and bars and universal broadband rental in the state of delivery (KCU-20 °C or after mechanical aging) | 
	
| 10-20 | 
≥265 | 
≥380 | 
≥23 | 
≥294 | 
	
| 2-3.9 | 
≥285 | 
≥390 | 
≥17 | 
- | 
	
| 4-10 | 
≥275 | 
≥390 | 
≥24 | 
≥294 | 
	| Structural steel in delivery condition (KCU-20 °C or after mechanical aging) | 
	
| 10-20 | 
≥275 | 
≥390 | 
≥23 | 
≥294 | 
	
| 4-10 | 
≥285 | 
≥400 | 
≥24 | 
≥294 | 
	
Description mechanical marks
	
		
			| Name | 
			Description | 
		
	
	
		
	| Section | 
	Section | 
	| sT|s0,2 | 
	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% | 
	| σB | 
	Limit short-term strength | 
	| d5 | 
	Elongation after rupture | 
	| kJ/m2 | 
	Toughness | 
	
Technological properties
	
		
			| Name | 
			The value | 
		
	
	
		
	| Weldability | 
	without restrictions |