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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 Reliving: 
 
Normalizing: 
 
Annealing: 
 
Density: 
321
 
Machinability: 
 
Welding: 
 
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