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Grade Introduction:
Carbon steels contain carbon as the key alloying element. They are designated by AISI four-digit numbers, and contain 0.4% of silicon and 1.2% of manganese. Molybdenum, chromium, nickel, copper, and aluminum are present in small quantities. Impurities such as sulfur and phosphorous may also be found in these steels. High machinability, used in automatic and CNC machines in mass production of components like Engine Shafts, Connecting components like Engine Shafts, Connecting rods, Spindles etc.
Grade Application:
EN15AM is widely used for many general engineering applications. Typical applications include shafts, studs, bolts, connecting rods, screws, rollers.
Equivalent grades:
| SAE1541 | 150M36 | 36Mn7 | 37C15 | EN15, 15A | SAE1541 | SMn438 |
Addition to other grades:
MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, 2714, SKD-11, P20, P20+S, P20+Ni, SCM 420, ASTM SA-36, ASTM SA-105, SAE 1018, SAE 1020, SAE 4140, SAE 8620, 16MNCR5, 20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE 52100, S40C, S355J2G3.
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Chemical composition:
The following table shows the chemical composition of EN15AM steel:
| Element | C | Si | Mn | P | S |
| Content (%) | 0.30 – 0.40 | 0.25 Max | 1.30-1.70 | 0.60 Max | 0.12-0.20 |
Mechanical Properties:
The main mechanical properties are elasticity, plasticity, stiffness,
aging sensitivity, strength, hardness, impact toughness, fatigue
strength and fracture toughness.
Elasticity: Metal material deforms when it is subjected to external
force. When the external force is removed, it can restore its original
shape.
Plasticity: The ability of B.S. En15AM BS 970 to produce permanent
deformation without causing damage under external forces.
Stiffness: The ability of B.S. En15AM BS 970 to resist elastic
deformation under stress.
Strength: The ability of B.S. En15AM BS 970 to resist deformation and
fracture under external forces.
Hardness: The ability of B.S. En15AM BS 970 to resist the pressure of
a harder object into it.
Impact toughness: The ability of B.S. En15AM BS 970 to resist fracture
under impact loading.
Fatigue strength: The maximum stress that does not cause fracture when
B.S. En15AM BS 970 is subjected to numerous repeated or alternating
loads.
Fracture toughness: a performance index used to reflect B.S. En15AM BS
970 is ability to resist crack instability and expansion
| Yield Rp0.2(MPa) | Tensile Rm (MPa) | Impact KV/Ku (J) | Elongation A (%) | Reduction in cross section on fracture Z (%) | As-Heat-Treated Condition | Brinell hardness (HBW) |
| 982 (≥) | 148 (≥) | 12 | 34 | 14 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 121 |
Hardness:
The ability of B.S. En15AM BS 970 to resist the pressure of a harder object into it.
Heat Treatment:
1422°C – 1194°C.
Hardening:
Tempering:
Physical Properties
Physical performance parameters of B.S. En15AM BS 970 are mainly indicated by thermal conductivity, specific thermal capacity, modulus of elasticity, coefficient of thermal expansion, electrical resistance value, density, poisson’s ratio, etc. parameters of B.S. En15AM BS 970.
| Temp.(°C) | Modulus of elasticity (GPa) | Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal cond.(W/m·°C) | Specific thermal capacity (J/kg·°C) | Specific electrical resistivity (Ω mm²/m) | Density (kg/dm³) | Poisson’s coefficient, ν |
| 13 | – | – | – | – | 0.13 | – | – |
| 881 | 516 | – | 43.3 | 134 | – | – | – |
| 862 | – | 32 | 12.2 | – | – | 321 | 412 |
Thermal Properties
Forging Properties:
Stress Relieving:
Normalizing:
Annealing:
Density:
321
Machinability:
Welding:
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