En9 Carbon Steel Round Bar

• Type: Carbon Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Forged
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Surface Treatment: Coated
• Alloy: Non-alloy
• Model NO.: KM-20200611
• Special Use: Mold Steel, Free Cutting Steel, Cold Heading Steel
• Transport Package: in Bundle with Plastic Bags
• Specification: 20-1000mm
• Trademark: KINGMETAL
• Origin: Chinack45
• HS Code: 7214100000
• Production Capacity: 3000 Tons Per Month

Product Description

EN9 Carbon steel round bar

EN9 Carbon steel is a medium carbon steel with  0.5-0.6% C as per BS 970 standard.It is also known as 070M55 with tensile strength between 500-800Mpa.EN9 steel is generally supplied  in untreated condition or in the normalized condition.This material can be flame or induction hardened to produce a high surface hardness with excellent wear resistance .When hardened and tempered, it develops a tensile strength in the range 700-1000 N/mm depending on ruling section.

1.EN9 steel Supply Form & Size

Hot rolled round bar:Φ20-Φ200mm,Length:3000-6000mm

Hot Forged round bar:Φ80-Φ1000mm,Length:3000-10000mm

Flat bar/Blcoks:Thickness :120-800mm xWidth:120-1500mm,Length:2000-6000mm

2.Surface Finish&Tolerance

Surface Finish	Black-Forged	Black-Rolled	Turned	Grinding	Polished	Peeled	Cold Drawn
Tolerance	(0,+5mm)	(0,+1mm)	(0,+3mm)	Best h9	Best h11	Best H11	Best H11

 

3.Chemical Composition

 

Grade	C	Mn	P	S	Si
EN9/070M55	0.5-0.6	0.50-0.9	≤ 0.05	≤ 0.05	0.1-0.4

4.Related Specifications

• BS 970-1991:070M55
• AISI/ASTM A29:1045,1050,1055,1060
• DIN Werkstoff No.: 1.0535,1.1209
• BS & DIN European:C45, CK45,C50,C55,CK55
• JIS G4051: S45C, S50C,S55C

5.Mechanical Property

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

 

6.EN9 steel Forging

Forging temperature:850-1100ºC,EN9 steel should be cooled as slowly as possible in still air or in sand after forged.

6.Heat Treatment

• 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.

•  Hardening

Hardening of this grade is carried out from an austenitizing temperature of 820-850ºC followed by oil or water quenching.

•  Tempering

Carbon steel EN9 or 070M55 can be tempered at a heat of between 550°C to 660°C,heating for about 1 hour for every inch of thickness, then cool in oil or water.

7.Application

EN9 steel is suitable for engineering applications which require  higher strength and  wear resistance.Typical applications include:shafts, axes, knives, bushes, crankshafts, screws, sprockets ,springs, cylinders, cams,sickles, wood working drills,small gears, machine tools, keys and hammers.