| Grade : | 15 ( 15 ) |
| Substitute: | 10, 20 |
| Classification : | High quality structural carbon steel |
| Equivalent grades: | Go here |
Chemical composition in % for grade 15 ( 15 )
| C | Si | Mn | Ni | S | P | Cr | Cu | As |
| 0.12 - 0.19 | 0.17 - 0.37 | 0.35 - 0.65 | max 0.3 | max 0.04 | max 0.035 | max 0.25 | max 0.3 | max 0.08 |
Temperature of critical points for grade 15 ( 15 ).
| Ac1 = 735 , Ac3(Acm) = 860 , Ar3(Arcm) = 840 , Ar1 = 685 |
Mechanical properties under Т=20oС for grade 15 ( 15 )
| Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
| - | mm | - | MPa | MPa | % | % | kJ / m2 | - |
| Sheet heat-treatment, GOST 4041-71 | 4 - 14 | 320-440 | 30 | |||||
| Pipe, GOST 5005-82 | 510 | 430 | 8 | |||||
| Rolled stock, GOST 1050-88 | to 80 | 370 | 225 | 27 | 55 | Normalizing | ||
| Rolled stock cold-worked , GOST 1050-88 | 440 | 8 | 45 | |||||
| Rolled stock annealed , GOST 1050-88 | 340 | 23 | 55 | |||||
| Band annealed , GOST 2284-79 | 310-490 | 20 | ||||||
| Band cold-worked , GOST 2284-79 | 440-780 |
| Brinell hardness for 15 ( 15 ) , Sheet GOST 4041-71 | HB 10 -1 = 121 MPa |
| Brinell hardness for 15 ( 15 ) , Bar GOST 10702-78 | HB 10 -1 = 125 MPa |
| Brinell hardness for 15 ( 15 ) , Rolled stock GOST 1050-88 | HB 10 -1 = 197 MPa |
| Brinell hardness for 15 ( 15 ) , Rolled stock GOST 1050-88 | HB 10 -1 = 149 MPa |
| Brinell hardness for 15 ( 15 ) , Rolled stock GOST 1050-88 | HB 10 -1 = 149 MPa |
| Brinell hardness for 15 ( 15 ) , Sheet trick GOST 1577-93 | HB 10 -1 = 143 MPa |
Technological properties for grade 15 ( 15 )
| Weldability: | without limitations. |
| Flakes : | not predisposed |
| Temper brittleness: | not predisposed |
Physical properties for grade 15 ( 15 )
| 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 | 2.01 | 53 | 7850 | |||
| 100 | 1.92 | 12.4 | 53 | 7827 | 465 | 233 |
| 200 | 1.85 | 13.2 | 53 | 7794 | 486 | 296 |
| 300 | 1.76 | 13.9 | 49 | 7759 | 515 | 387 |
| 400 | 1.56 | 14.4 | 46 | 7724 | 532 | 487 |
| 500 | 14.8 | 43 | 7687 | 565 | 607 | |
| 600 | 15.1 | 39 | 7648 | 586 | 753 | |
| 700 | 15.3 | 36 | 7611 | 620 | 904 | |
| 800 | 14.1 | 32 | 7599 | 691 | 1092 | |
| 900 | 13.2 | 30 | 7584 | 708 | 1140 | |
| T | E 10- 5 | a 10 6 | l | r | C | R 10 9 |
Equivalent steels for grade 15 ( 15 )
| USA | Germany | Japan | France | England | European | Italy | Belgium | Spain | China | Sweden | Bulgaria | Hungary | Poland | Romania | Czechia | Austria | Switzerland | South Korea | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| - | DIN,WNr | JIS | AFNOR | BS | EN | UNI | NBN | UNE | GB | SS | BDS | MSZ | PN | STAS | CSN | ONORM | SNV | KS | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Types of delivery of grade 15 ( 15 )
| B03 - Metal forming treatment. Forgings |
| 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 |
15 ( 15 ) - High quality structural carbon steel: chemical composition, mechanical and physical properties, hardness
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