| Grade : | 08kp ( 08кп ) |
| Substitute: | 08 |
| Classification : | High quality structural carbon steel |
| Equivalent grades: | Go here |
Chemical composition in % for grade 08kp ( 08кп )
| C | Si | Mn | Ni | S | P | Cr | Cu | As |
| 0.05 - 0.12 | max 0.03 | 0.25 - 0.5 | max 0.3 | max 0.04 | max 0.035 | max 0.1 | max 0.3 | max 0.08 |
Temperature of critical points for grade 08kp ( 08кп ).
| Ac1 = 732 , Ac3(Acm) = 874 , Ar3(Arcm) = 854 , Ar1 = 680 |
Mechanical properties under Т=20oС for grade 08kp ( 08кп )
| Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
| - | mm | - | MPa | MPa | % | % | kJ / m2 | - |
| Sheet heat-treatment, GOST 4041-71 | 4 - 8 | 270-370 | 34 | |||||
| Pipe, GOST 5005-82 | 390 | 350 | 10 | |||||
| Pipe, GOST 10705-80 | 294 | 174 | 27 | |||||
| Rolled stock, GOST 10702-78 | 370 | 8 | 60 | |||||
| Steel cold-drawn , GOST 10702-78 | 314-412 | 60 | Annealing | |||||
| Strip, GOST 1577-93 | 6 - 60 | 290 | 175 | 35 | 60 | Normalizing |
| Brinell hardness for 08kp ( 08кп ) , Sheet GOST 4041-71 | HB 10 -1 = 100 MPa |
| Brinell hardness for 08kp ( 08кп ) , Rolled stock GOST 10702-78 | HB 10 -1 = 115 MPa |
| Brinell hardness for 08kp ( 08кп ) , Rolled stock GOST 10702-78 | HB 10 -1 = 131 MPa |
Technological properties for grade 08kp ( 08кп )
| Weldability: | without limitations. |
| Flakes : | not predisposed |
| Temper brittleness: | not predisposed |
Physical properties for grade 08kp ( 08кп )
| T | E 10- 5 | a 10 6 | l | r | C | R 10 9 |
| Grade | MPa | 1/Grade | Watt/(m·Grade) | kg/m3 | J/(kg·Grade) | Ohm·m |
| 20 | 2.03 | 63 | 7871 | 147 | ||
| 100 | 2.07 | 12.5 | 60 | 7846 | 482 | 178 |
| 200 | 1.82 | 13.4 | 56 | 7814 | 498 | 252 |
| 300 | 1.53 | 14 | 51 | 7781 | 514 | 341 |
| 400 | 1.41 | 14.5 | 47 | 7745 | 533 | 448 |
| 500 | 14.9 | 41 | 7708 | 555 | 575 | |
| 600 | 15.1 | 37 | 7668 | 584 | 725 | |
| 700 | 15.3 | 34 | 7628 | 626 | 898 | |
| 800 | 14.7 | 30 | 7598 | 695 | 1073 | |
| 900 | 12.7 | 27 | 7602 | 703 | 1124 | |
| 1000 | 13.8 | 695 | ||||
| T | E 10- 5 | a 10 6 | l | r | C | R 10 9 |
Equivalent steels for grade 08kp ( 08кп )
| USA | Germany | Japan | France | England | European | Italy | Spain | China | Sweden | Bulgaria | Hungary | Poland | Romania | Czechia | Finland | Austria | Australia | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| - | DIN,WNr | JIS | AFNOR | BS | EN | UNI | UNE | GB | SS | BDS | MSZ | PN | STAS | CSN | SFS | ONORM | AS | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Types of delivery of grade 08kp ( 08кп )
| В22 - Graded and shaped rolling |
| B23 - Sheets and Strips |
| B24 - Ribbons |
| В32 - Graded and shaped rolling |
| B33 - Sheets and Strips |
| B34 - Ribbons |
| В62 - Steel pipes and connecting parts to them |
| В71 - Low-carbon steel wire |
| В72 - Medium-high and high-carbon steel wire |
| B76 - Metal nets |
Specification :
| Mechanical properties : | |
| sв | - Tensile strength , [MPa] |
| sT | - Yield stress, [MPa] |
| d5 | - Specific elongation at fracture , [ % ] |
| y | - Reduction of area , [ % ] |
| KCU | - Impact strength , [ kJ / m2] |
| HB | - Brinell hardness , [MPa] |
Physical properties : | |
| T | - Test temperature , [Grade] |
| E | - Young modulus , [MPa] |
| a | - Coefficient of linear expansion (range 20o - T ) , [1/Grade] |
| l | - Termal (heat) condition coefficient , [Watt/(m·Grade)] |
| r | - Density , [kg/m3] |
| C | - Specific heat ( range 20o - T ), [J/(kg·Grade)] |
| R | - Electrical resistance , [Ohm·m] |
Weldability : | |
| without limitations | - welding is done without heating and subsequent heat treeting |
| limited weldability | - welding is possible under heating up to 100-120 grade and subsequent heat treeting |
| hard weldability | - obtaining the quality welding needs the additional operations:heating up to 200-300 grade; the heat treeting ia annealing |
08kp ( 08кп ) - High quality structural carbon steel: chemical composition, mechanical and physical properties, hardness
Database of steels and alloys (Marochnik) contains information about chemical composition and properties more then 3000 steels and alloys
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