| 28Cr4 EN 10084-1998, Number: 1.7030 | Comparison of steel grades | |
| JUS | Ć.41341 | |
| DIN | 28Cr4 | |
| BS | - | |
| GOST | - | |
| AISI | SAE 5130 | |
| UNI | ||
| NF | - | |
Under EN10084-1998 standard,28Cr4 Alloy steel Application fields:
(1) Zinc-coating base plates and cold-rolled annealing base plates;
(2) Construction and furniture;
(3) widely used in the fields of machinery, building, ship building,
vehicle, locomotives, container, making, casting and forging.
28Cr4 STEEL 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 | ≤ 0,035 | 0,90 – 1,20 |
| Permissible deviation | ± 0,02 | + 0,03 | ± 0,04 | + 0,005 | + 0,005 | ± 0,05 |
28Cr4 STEEL SHEET 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 | 36 | 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: 28Cr4
