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Information of Properties, Composition & Equivalent of Q355 Steel, Q355B Q355C Q355D

Information of Properties, Composition & Equivalent of Q355 Steel, Q355B Q355C Q355D

Q355 steel is a new Chinese steel grade of Low Alloy High Strength Structural Steel, which replaced Q345, the material density is 7.85 g/cm3. According to GB/T 1591-2018, Q355 has 3 quality levels: Q355B, Q355C and Q355D. “Q” is the first letter of Chinese Pinyin: “qu fu dian”, which means Yield Strength, “355” is short for 355 MPa, parameters are tested with 16mm diameter steel bars or steel plates, and tensile strength is 470-630 Mpa.

Q355 Features and Applications

Q355 steel has good mechanical properties, good weldability, hot and cold processing properties and corrosion resistance. Can be used to manufacture ships, boilers, pressure vessels, petroleum storage tanks, bridges, power station equipment, lifting transport machinery and other higher load welded structural parts.

Q355 Steel Chemical Composition (Hot rolled)

Steel Grade

Quality Grade

C % (≤)

Si % (≤)

Mn (≤)

P (≤)

S (≤)

Cr (≤)

Ni (≤)

Cu (≤)

N (≤)

Mo (≤)

B (≤)

Nb (≤)

V (≤)

Ti (≤)

Q355

Q355B

0.24

0.55

1.6

0.035

0.035

0.30

0.30

0.40

0.012

Q355C

0.20

0.030

0.030

0.012

Q355D

0.20

0.025

0.025

Carbon Equivalent (CEV)

Based on smelting analysis, steel delivered in hot rolled state

 

 

CEV (Mass fraction ≤%); Nominal thickness or diameter Ø

Steel Grade

Quality Grade

≤ 30

30 < Ø ≤ 63

63 < Ø ≤ 150

150 < Ø ≤ 250

250 < Ø ≤ 400

Q355

Q355B

0.45 (CEV)

0.47

0.47

0.49

Q355C

Q355D

0.49

Q355 Mechanical Properties (Hot rolled)

 

 

Thickness or Dia. (Ø) mm; Yield Strength (≥N/mm2)

Steel Grade

Quality Level

Ø≤16

16< Ø ≤40

40 < Ø ≤63

63 < Ø ≤ 80

80 < Ø ≤ 100

100 < Ø ≤ 150

150 < Ø ≤ 200

200 < Ø ≤ 250

250 < Ø ≤ 400

Q355

Q355B

355

345

335

325

315

295

285

275

Q355C

Q355D

265

 

 

 

Dia. (Ø) mm; Tensile Strength (N/mm2)

Steel Grade

Quality Level

Ø≤100

100 < Ø ≤ 150

150 < Ø ≤ 250

250 < Ø ≤ 400

Q355

Q355B

470 – 630

450 – 600

450 – 600

Q355C

Q355D

450 – 600

Q355 Steel Elongation

 

Dia. (Ø) mm; Elongation (%)

Sample direction

Ø≤40

40 < Ø ≤ 63

63 < Ø ≤ 100

100 < Ø ≤ 150

150 < Ø ≤ 200

250 < Ø ≤ 400

Horizontal

20

19

18

18

17

17

Vertical

22

21

20

18

17

17

Q355 Steel Equivalents (Reference)

China

ISO

EN

Standard

Grade

Standard

Grade

Standard

Grade

GB/T 1591-2018

Q355B

ISO 630-2 2011

S355B

EN 10025-2 2004

S355JR

Q355C

S355C

S355J0

Q355D

S355D

S355J2

welocme to contact katalor if you are looking for suppler of Q355 steel 

Pre: A283 grade c steel specification

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Shanghai Katalor Enterprises Co., Ltd

0086-18317160019
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No.230,1st Floor,Building No.1,No.221 Of Huashen Road,Free Trade Area Of Pudong New District,Shanghai China
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