EN9

Grade Introduction:
EN9 carbon steel is a medium carbon steel grade commonly supplied in the as-rolled condition. It can be flame or induction hardened to produce a high surface hardness with excellent wear resistance for a carbon steel grade. EN9 bar is available in full lengths or can be cut to your requirements. EN9 carbon round steel bar flame cut steel plates can be supplied cut to your required sizes and normalized. Flame cut plates can be supplied Lumsden ground or precision ground.

Grade Application

EN9 is used commonly for many general engineering applications. Typical applications include shafts, axes, knives, bushes, crankshafts, screws, sickles, woodworking drills, and hammers.

Equivalent Grades

BS 970 1991 BS 970 1955 EN AISI/SAE Werksoff
070M55 EN9 1055 1.0535

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, DIN1.2714, P20, P20+S, P20+Ni, SCM420, ASTMSA-36, ASTMSA-105, SAE1018, SAE4140, SAE8620, 16MNCR5, 20MNCR5, C20, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.

Our Supply Range

We supply to automotive ancillaries and OEM customers. The products we manufacture are used as input for manufacturing of automotive and general engineering components. These components are further assembled into systems fitted in automobiles and other engineering applications.

Product Type Size Range
Forged Round Bars 140mm Dia to 850mm
Rolled Round Bars 16mm Dia and above
Forged Flat Bars Thickness: 32mm to 510mm, Width: 65mm to 1050mm
Rolled Flat Bars Thickness: 6mm to 110mm, Width: 25mm to 510mm

Chemical Composition

The following table shows the chemical composition of EN9 steel:

Element C Si Mn P S Cr
Content(%) 0.50-0.60 0.4 Max 0.50-0.80 0.035 Max 0.015-0.035 0.30 Max

Mechanical Properties

Condition N R S T
Ruling Section,mm 254 100 65 20
Tensile Strength,Mpa 600-700 690-850 770-930 850-1000
Yield Strength,Mpa ≥310 ≥415 ≥480 ≥570
Elongation 13% 14% 14% 12%
Hardness, HBW 201-255 201-255 223-277 248-302

Heat Treatment

Heat treatment temperatures, including the rate of heating, cooling, and soaking times will vary due to factors such as the shape and size of each EN9 steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium, and workpiece transfer facilities.

Hardening

Heat slowly to 820-840°C and allow it to be heated through. Quench in oil, brine, or water.

Forging Properties

Preheat the component carefully, then raise the temperature to 1100°C for forging. Do not forge below 850°C. After forging cool slowly, preferably in a furnace.

Tempering

Temper the EN9 steel component immediately after quenching whilst still hand warm. Re-heat to the tempering temperature then soak for one hour per 25 millimeters of total thickness (2 hours minimum) Cool in air. For most applications tempering of EN9 will be between 550-660°C.

Temperature [°C]
150
200
250
300
Hardness [HRc]
63-62
62-61
60-59
57-56

Normalizing

The normalizing temperature range for this grade is typically 820-880ºC, followed by cooling in still air.

Annealing

Heat slowly to 680-710°C, soak well. Cool slowly in the furnace.

Supply Cities

Ambattur, Bangalore, Chennai, Coimbatore, Dindigul, Guindy, Madurai, Nellore, Hyderabad, Tirupur, Tuticorin, Madurai, Andhra Pradesh, Karnataka, Puducherry, Kerala, Kanyakumari, Telangana, Salem, Thanjavur, Trichy, Erode, Vellore, Karur, Nagercoil, Kanchipuram, Karaikudi, Pudukottai, Nagapattinam.

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