EN8/EN9 En Series Round Steel Bar
EN8 is a medium carbon steel with a carbon content of 0.25% to 0.60%. It is often used to manufacture mechanical parts, bearings, gears and other parts. It has high strength and wear resistance and can obtain high hardness and strength after heat treatment.
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Product Description

EN8/EN9 En Series Round Steel Bar Description

The chemical composition of EN8 includes carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S) and other elements. The carbon content is the most important, usually between 0.36-0.44%. EN8 has good weldability, and it can be welded by conventional welding methods, such as arc welding, gas welding, etc. However, when performing high-intensity welding, care needs to be taken to control the welding heat to prevent material deterioration. EN8 carbon steel bars are widely used in the manufacturing industry, especially where high strength and wear resistance are required. They are often used to manufacture bearings, pins, mechanical parts, etc..


Product Parameters

Product Name

EN8/EN9 En Series Round Steel Bar

Standard

EN/DIN/JIS/ASTM/BS/ASME/AISI, etc.

Common Round Bar Specifications

3.0-50.8 mmOver 50.8-300mm

Flat Steel Common Specifications

6.35x12.7mm, 6.35x25.4mm, 12.7x25.4mm

Hexagon Bar Common Specifications

AF5.8mm-17mm

Square Bar Common Specifications

AF2mm-14mm, AF6.35mm9.5mm, 12.7mm, 15.98mm, 19.0mm, 25.4mm

Length

1-6meters, Size Accept Custom

Diameter(mm)

Hot Rolling Round Bar

25-600

Cold Rolling Square Bar

6-50.8

Hot Rolling Square Bar

21-54

Cold Rolling Hexagon Bar

9.5-65

Cold Rolling Round bar

6-101.6

Forged Rebar

200-1000

Surface Process

Bright, Polished, Black

Other Services

Machining(cnc), Centerless Grinding(cg), Heat Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc.

 

Chemical Composition

Grade

C %

Si %

Mn %

Cr %

Mo %

W %

EN-1A

0.007-0.15

0.10

0.80-1.00

S

P

-

0.20-0.30

0.70 MAX

EN-8

0.35-0.45

0.05-0.30

0.60-1.00

S

P

-

0.06 MAX

0.06 MAX

EN-9

0.50-0.60

0.05-0.30

0.5-0.80

-

-

-

EN-19 (V 320)

0.35-0.45

0.10-0.30

0.5-0.80

0.90-1.40

0.20-0.40

 

EN-24 (V 130)

0.35-0.45

0.10-0.35

0.45-0.70

0.90-1.40

0.20-0.35

NI

1.3-1.8

EN-31 R-100

0.90-1.20

0.10-0.35

0.30-0.75

1.00-1.60

-

-

EN-36C E-200

0.12-0.18

0.10-0.35

0.30-0.60

0.60-1.10

-

NI

3.0-3.75

EN-42

0.70-0.85

0.10-0.40

0.55-0.75

-

-

-

EN-44

0.90-1.20

0.30

0.45-0.70

-

-

-

EN-45 F-110

50-0.60

1.5-2.0

0.70-1.00

-

-

-

EN-351

0.10-0.20

0.35

0.60-1.00

0.40-0.80

0.08-0.10

NI

0.60-1.00

EN-353

0.10-0.20

0.35

0.50-1.00

0.75-1.25

0.08-o.15

NI

1.00-1.50

 

Mechanical Properties

Grade

Hardening Temperature

Quenching Medium

Tempering Temperature

Brinell Hardness

JapanHe

AISI

EN-1A

-

-

-

-

-

-

EN-8

750-900

OIL

150-200

 

-

1040

EN-9

850-900

OIL

200-250

55-60

-

-

EN-19 (V 320)

900-950

OIL

200-225

45-55

SCM 4

4140

EN-24 (V 130)

830-860

OIL

540-680

45-55

SNCM 8

4340

EN-31 R-100

820-860

OIL

180-225

59-65

-

-

EN-36C
E-200

780-860

OIL

170-210

61-63

SNC 22

3415

EN-42

600-700

DIRECT HARDENING

 

40-45

-

-

EN-44

650-750

OIL

150

45-50

-

-

EN-45

830-860

OIL

470-520

50-55

-

9255

EN-351

850-860

OIL

175-200

62-64

-

-

EN-353

840-870

OIL

150-200

62-64

-

-

 

Scope of Application

The EN series is widely used in many general engineering applications. Typical applications include shafts, studs, bolts, connecting rods, screws, etc.

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Product Application

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Factory Display

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FAQ

Q1: What types of steel products does your company primarily manufacture and supply?
A: We are a direct manufacturer specializing in carbon steel, hot-dip galvanized steel, PPGI (pre-painted galvanized iron), and stainless steel (grades 201, 304, and 316) in the form of sheets, coils, pipes, and various structural profiles, along with complementary steel structural components. Our products serve a wide range of industries, including infrastructure, photovoltaics, machinery manufacturing, chemicals, and new energy.

 

Q2: Do you support customization regarding material grades, thicknesses, and dimensions?
A: Customization is available across our entire product range. For carbon steel, galvanized steel, and stainless steel, we can adjust thickness, width, and cut-to-length dimensions according to GB, ASTM, or EN standards. Various profiles can be cut and bent based on customer drawings, and special steel grades can be produced through customized scheduling.

 

Q3: What is the difference between galvanized steel and color-coated (PPGI) steel, and how should I choose for my project?
A: Hot-dip galvanized steel features a pure zinc anti-rust layer; it is cost-effective and impact-resistant, making it ideal for mounting brackets, guardrails, and load-bearing factory structures (and it can be painted over). PPGI color-coated steel uses a galvanized base, offering both rust protection and aesthetic appeal with a wide range of colors; it is commonly used for factory roofing, wall cladding, and energy storage equipment casings. We recommend thicker galvanized coatings for projects in rainy coastal areas, color-coated sheets for outdoor projects requiring visual appeal, and weather-resistant fluorocarbon (PVDF) coatings for high-temperature desert environments.

 

Q4: Does the factory keep stock on hand, and what is the minimum order quantity (MOQ)?
A: We operate our own standardized, zoned warehouse with a capacity of over 10,000 tons, maintaining ample stock of carbon steel, galvanized steel, and stainless steel. The MOQ for standard specifications is 1 ton, though we also accept sample orders as small as a few dozen kilograms. There is no upper limit for large-scale projects, and we support mixed-load shipments combining different steel products in a single container.

 

Q5: What are the lead times for stock items versus customized products?
A: Standard stock items take 3–7 days for processing, packaging, and container loading. Simple cutting and bending orders take 7–10 days. Orders requiring mold creation or special steel customization take 15–30 days; exact delivery dates are confirmed based on the customer's specific order specifications.

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