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Grade Introduction:

EN32B is a carbon case hardening steel. Components when carburized have a core strength range of 430-490 N/mm2, with a hard-wearing surface. It is a popular case hardening steel grade for general engineering, readily machinable and weldable in its supply condition. EN32B is low tensile steel suited for lightly stressed components.

Grade Application:

Commonly used for general engineering lightly stressed applications that are subject to wear, EN32B is suitable for applications such as collets, cams, rollers, bushes, spindles, and gears.

Equivalent grades:

IS C14
SAE/AISI 1015, 1016, 1018
IS C15Mn75
Wnr 1.1141
USA 1015,1016
BS 040A15

Addition to other grades:

MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, OHNS, HCHCR, D2, D3, H-11, H-13, CW-1, 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 EN32B steel:

Element C Si Mn P S
Carbon(%) 0.13-0.18 0.10-0.40 0.70-0.90 0.05 Max 0.05 Max

Mechanical Properties:

Tensile Strength Elongation Impact Impact Test Piece
Rm N/mm2 percent 5.665ÖSo Izod J KCV J Size
490 460 430 16 16 18 30 30 30 35 35 35 13 19 29


Heat Treatment:

HHeat treatment temperatures, including the rate of heating, cooling, and soaking times will vary due to factors such as the shape and size of each steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium, and workpiece transfer facilities.


Harden at a temperature of 760-780°C. Quench in water.


Tempering is recommended for stress relief and maximum case toughness. Tempering ranges from 150-200°C.

Physical Properties

Thermal Properties

Thermal conductivity 51.9 W/mK 360 BTU in/hr.ft².°F

Forging Properties:

Heat slowly and uniformly to 1100°C. After forging cool slowly.

Stress Relieving:

After rough machining tools should be stress relieved. Soaking time 2 hours after the whole piece has attained a temperature of approximately 675°C. Cool in a furnace to approximately 500°C, and then freely in the air.


Normalize at 840-870°C, and cool in air.


Heat uniformly to 700°C. Soak well and cool slowly in the furnace.




Supply Cities:

Ahmedabad, Amaravathi, Ambattur, Bangalore, Belgaum, Chennai, Chittoor, Coimbatore, Dindigul, Mysore, Nellore, Hyderabad, Kochi, Mangalore, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Tamil Nadu, Telangana, Salem, Thanjavur, Trichy, Erode, Vellore, Ranipet, Sivakasi, Karur, Hosur, Nagercoil, Kanchipuram, Karaikudi, Neyveli, Cuddalore, Kumbakonam, Thiruvannamalai, Pollachi, Rajapalayam, Gudiyatham, Pudukottai, Vaniyambadi, Ambur, Nagapattinam, Trivandrum, Vijayawada, Guntur, Thirupathi, Nazarathpet, Kakinada, Kurnool, Kadapa, Nizamabad, Mahabubnagar, Karimnagar.