Properties of En24 Steel BS970 817M40 (En24T Material)
The following tables summarize BS970 817M40 (Material En24T), En24 steel properties and specifications including chemical composition, mechanical properties, hardness, heat treatment, etc.
Chemical composition
The chemical composition of EN24 steel (En24T steel) and BS970 817M40 is listed in the following table.
| Chemical Composition (Casting Analysis), % | ||||||||||
| Country (Region) | Standard | Steel Grade | W | Yes | Mn | P, ≤ | S, ≤ | Cr | No | Mo |
| Great Britain | BS 970-1955 | En24 (En24T) | 0.35-0.45 | 0.10-0.35 | 0.45-0.70 | 0.050 | 0.05 | 0.90-1.40 | 1.3-1.8 | 0.20-0.35 |
| BS 970-1991 | 817M40 | 0.36-0.44 | 0.10-0.40 | 0.45-0.70 | 0.035 | 0.04 | 1h00-1h40 | 1.3-1.7 | 0.20-0.35 | |
Mechanical properties
The mechanical properties of En24 (En24T) and 817M40 steels are listed in the following tables, including yield strength (yield stress), ultimate tensile strength, shear strength, modulus of elasticity, modulus of elasticity, etc.
Grades:
- 1 MPa = 1 N/mm2
- 1 GPa = 1kN/mm2
| Reference symbols for tensile strength bands | |
| Symbol | Tensile strength, MPa (ksi) |
| P | 550-700 (80-100) |
| P | 625-775 (90-112) |
| R | 700-850 (100-123) |
| s | 775-925 (110-134) |
| T | 850-1000 (123-145) |
| you | 925-1075 (134-156) |
| V | 1000-1150 (145-167) |
| W | 1075-1225 (156-177) |
| X | 1150-1300 (167-188) |
| s | 1225-1375 (177-199) |
| Z | ≥ 1550 (225) |
| En24T, En24 Mechanical Properties | ||||||||
| Standard | Steel | Hardened and tempered condition | Limiting the decision section, in (mm) | Tensile strength, tons/in2 (Mpa) [ksi]≥ | Yield stress, tons/in2 (Mpa) [ksi]≥ | Elongation, %, ≥ | Izod impact, ft lb, ≥ | Brinell Hardness, HB |
| BS970-1955 | En24 | s | 6 (152) | 50 (772) [112] | 38 (587) [85] | 20 | 40 | 223-277 |
| T | 6 (152) | 55 (850) [123] | 44 (680) [98] | 18 | 40 | 248-302 | ||
| you | 4 (101) | 60 (926) [134] | 48 (741) [107] | 17 | 35 | 269-321 | ||
| V | 2.5 (63.5) | 65 (104) [145] | 52 (803) [116] | 16 | 35 | 293-341 | ||
| W | 1.125 (28.5) | 70 (1081) [157] | 58 (895) [130] | 15 | 30 | 311-375 | ||
| X | 1.125 (28.5) | 75 (1158) [168] | 63 (973) [141] | 14 | 25 | 341-388 | ||
| s | 1.125 (28.5) | 80 (1235) [179] | 68 (1050) [152] | 14 | 22 | 363-415 | ||
| Z | 1.125 (28.5) | 100 (1544) [224] | 85 (1313) [190] | 8 | 8 | ≥ 444 | ||
| Mechanical Properties of BS970 817M40 Steel | |||||||||
| Standard | Steel | Tensile strength, Mpa (ksi), ≥ | Yield strength, Mpa (ksi), ≥ | 0.2% proof strength | Elongation after fracture, 5.65 √S0 , ≥ | Impact, Izod (Charpy V-notch impac) in J, ≥ | Hardness, HB | Diameter between planes or thickness | |
