| 28CrS4 EN 10084-1998, Number: 1.7036 | Comparison of steel grades | |
| JUS | Č.41342 | |
| DIN | 28CrS4 | |
| BS | - | |
| GOST | - | |
| AISI | - | |
| UNI | - | |
| NF | - | |
Under EN 10250-2:1999 standard,the 28CrS4 structural steel is to point to to meet a certain strength and
formability levels of steel. Formability tensile test to break elongation said. Structural steel are used for
carrying such use, in these USES the strength of steel is an important design standards. Structural steel can be
divided into: alloy steel carbon structural steel low alloy steel heat resistant steel, etc.
28CrS4 steel plate/sheet Chemical composition (cast analysis)
| Chemical elements | C | Si max. |
Mn | P max. | S | Cr |
| %, by mass | 0,24-0,31 | 0,40 | 0,60-0,90 | 0,035 | 0,020-0,040 | 0,90 – 1,20 |
| Permissible deviation | ± 0,02 | + 0,03 | ± 0,04 | + 0,005 | ± 0,005 | ± 0,05 |
Hardness limits for steel
| Hardness HRC at a distance from quenched end of test piece (in milimetres) of | |||||||||||||||||
| mm | 1,5 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | ||
| +H | max. | 53 | 52 | 51 | 49 | 45 | 42 | 39 | 36 | 33 | 30 | 29 | 28 | 27 | - | - | |
| min. | 45 | 43 | 39 | 29 | 25 | 22 | 20 | - | - | - | - | - | - | - | - | ||
| +HH | max. | 53 | 52 | 51 | 49 | 45 | 42 | 39 | 36 | 33 | 30 | 29 | 28 | 27 | - | - | |
| min. | 48 | 46 | 43 | 35 | 32 | 29 | 26 | 23 | 20 | - | - | - | - | - | - | ||
| +HL | max. | 50 | 49 | 47 | 42 | 38 | 35 | 33 | 30 | 27 | 24 | 23 | 22 | 21 | - | - | |
| min. | 45 | 43 | 39 | 29 | 25 | 22 | 20 | - | - | - | - | - | - | - | - | ||
Hardness requirements for products delivered in the conditions ’’treated to improve shearabilita’’ (+S), ’’anneled to maximum hardness requirements’’ (+A), ’’treated to hardness range’’ (+TH) or ’’treated to ferrite-pearlite structure and hardness range’’ (+FP)
| Brinell hardness in the condition | |||||
| +S max. | +A max. | +TH | +FP | ||
| min. | max. | min. | max. | ||
| 255 | 217 | 166 | 217 | 156 | 207 |
Non-metallic inclusions Requirements for microscopic degree of purity when tested in accordance with DIN 50 602 (method K) (valid for oxidic non-metallic inclusions)
| D (mm) Bars Diameter d (mm) | K Total characteristic value K (oxides) for the individual cast |
| 140 < d 200 | K 4 ≤ 50 |
| 100 < d ≤ 140 | K 4 ≤ 45 |
| 70 < d ≤ 100 | K 4 ≤ 40 |
| 35 < d ≤ 70 | K 4 ≤ 35 |
| 17 < d ≤ 35 | K 3 ≤ 40 |
| 8 < d ≤ 17 | K 3 ≤ 30 |
| d ≤ 8 | K 2≤ 35 |
Conditions for heat treating test bars and treatment of the steels
| End quenchh test Quenching, 0C | Carbunnzing temperature, 0C | Core-hardening temperature, 0C | Case-hardening temperature, 0C | Tempering, 0C |
| 850 | 880 to 980 | 860 to 900 | 780 to 820 | 150 to 200 |
Source:
Tags: 28CrS4
