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Mild Steel Flat Bar Black Steel Strip

mild steel flat bar, there are Q195, Q215, Q235, Q275, Q355, Q390, Q420, Q460 and other grades. For more information on chemical composition, mechanical properties, applications, etc., please refer to Hanhuang Steel.

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Purchasing Information

Product Name

Mild Steel Flat Bar

Standard

ASTM, DIN, JIS, EN, AISI, BS, GB

Grade Group

Q195, Q215, Q235, Q275, Q355, Q390, Q420, Q460

Thickness

4-12mm or as your request

Section Shape

flat bar

Technique

hot rolled, cold drawn

Suface Treatment

Black Painted / Oiled /Galvanized

Width

8-140 mm

Length

1-12m or as your request

MOQ

1 ton

Supply Ability

5000 tons / month

Lead Time

10-15 working days after the receipt of 30% deposit

Payment Terms

30%T/T Advance + 70% Balance

Price Terms

FOB, CFR, CIF, EXW

Packing

Standard sea-worthy package or as required

*If you do not find what you are looking for, please call us now. If you have found it, we are happy to answer any questions or concerns you may have about flat bar grades and assist you through the purchasing process.

Industry&Application

mild steel flat bar, there are Q195, Q215, Q235, Q275, Q355, Q390, Q420, Q460 and other grades. For more information on chemical composition, mechanical properties, applications, etc., please refer to Hanhuang Steel.

Get a Quote

Characteristic

Properties:

 

Chemical properties of mild steel flat bar, no greater than.

Carbon structural steels

Steel Grade

Grade

C

Si

Mn

P

S

Q195

-

0.12

0.30

0.50

0.035

0.040

Q215

A

0.15

0.35

1.20

0.045

0.050

B

0.045

Q235

A

0.22

0.35

1.40

0.045

0.050

B

0.20

0.045

C

0.17

0.040

0.040

D

0.035

0.035

Q275

A

0.24

0.35

1.50

0.045

0.050

B

0.21

0.045

0.045

C

0.20

0.040

0.040

D

0.035

0.035

 

Chemical properties of mild steel flat bar, no greater than.

High strength low alloy structural steels

Steel Grade

Grade

C

Si

Mn

P

S

Nb

V

Ti

Cr

Ni

Cu

Mo

N

B

Q355

B

0.24

0.55

1.60

0.035

0.035

-

-

-

0.30

0.30

0.40

-

0.012

-

C

≤40mm:0.20

＞40mm:0.22

0.030

0.030

D

0.025

0.025

-

Q390

B

0.20

0.55

1.70

0.035

0.035

0.05

0.13

0.05

0.30

0.50

0.40

0.10

0.015

-

C

0.030

0.030

D

0.025

0.025

Q420

B

0.20

0.55

1.70

0.035

0.035

0.05

0.13

0.05

0.30

0.80

0.40

0.20

0.015

 

C

0.030

0.030

Q460

C

0.20

0.55

1.80

0.030

0.030

0.05

0.13

0.05

0.30

0.80

0.40

0.20

0.015

0.004

 

Mechancal properties of mild steel flat bar

Carbon structural steels

Steel Grade

Yield Strength ReH/(N/mm2), not less than

Tensile Strength

Rm/(N/mm2)

Elongation after break

A/%

not less than

Thickness/mm

Thickness/mm

≤16

＞16~40

＞40~60

＞60~100

＞100~150

＞150~200

≤40

Q195

195

185

-

-

-

-

315~430

33

Q215

215

205

195

185

175

165

335~450

31

Q235

235

225

215

215

195

185

370~500

26

Q275

275

265

255

245

225

215

410~540

22

 

Mechancal properties of mild steel flat bar

High strength low alloy structural steels

Steel Grade

Upper Yield Strength

ReH/MPa

not less than

Tensile Strength

Rm/MPa

Elongation after break

A/%

not less than

Thickness/mm

≤16

＞16~40

＞40~63

＞63~80

＞80~100

＞100~150

≤100

＞100~150

≤40

Q355

355

345

335

325

315

295

470~630

450~600

22

Q390

390

380

360

340

340

320

490~650

470~620

21

Q420

420

410

390

370

370

350

520~680

500~650

20

Q460

460

450

430

410

410

390

550~720

530~700

18


Application:

 

1. Q195: Used in construction, structure, motorcycle frame, etc.

2. Q215: Mainly used for building structures such as workshops, bridges, and ships, and for general fluid transportation pipelines.

3. Q235: widely used in architectural and engineering structures. It is used to make steel bars or build factory building frames, high-voltage transmission towers, bridges, vehicles, boilers, containers, ships, etc. It is also widely used as mechanical parts that do not require high performance.

4. Q275: Used to manufacture parts requiring higher strength. Such as gears, shafts, sprockets, keys, bolts, nuts, sections for agricultural machinery, conveyor chains and links.

5. Q355: Used in bridges, vehicles, ships, buildings, pressure vessels, special equipment, etc.

6. Q390: Ships, boilers, pressure vessels, oil storage tanks, bridges, power station equipment, lifting and transportation machinery and other welded structural parts with relatively high loads.

7. Q420: Large ships, bridges, power station equipment, medium and high pressure boilers, high pressure vessels, rolling stock, overweight machinery, mining machinery, and other large welded structural parts.


FAQ:

 

Q:Can you send samples?

A:Sample can be for free,freight cost collect.

Q:What product information do I need to provide?

A:Steel grade/thickness/width/quantity,these will decide the price.

Q:About product prices?

A:Prices vary from period to period due to cyclical changes in the price of raw materials.

Q:What are the certifications for your products?

A:We have ISO 9001,CE,SGS,BV and other certifications.

Q:How about the delivery time?

A:Regularly the delivery time around 10-15 days,customized one will inform the delivery time ahead.

Q:Does the product have quality inspection before loading?

A:All the products are strictly tested before packaging,also can inspect by third party inspection.

Q:How to pack the products?

A:Standard export package with waterproof film and wooden pallet.It can effectively protect products from corrosion.

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