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Q420 steel plate

Q420 steel is a Chinese steel grade of Low Alloy High Strength Structural Steel, Yield Strength is 420 MPa and tensile strength is 520-680 Mpa, the material density is 7.85 g/cm3.A wide variety of q420 steel options are available to you, such as hot rolled, cold rolled. You can also choose from steel plate, steel coil, and alloy steel bar q420 steel

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Carbon steel plate

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Q420 Steel Introduction
Q420 steel is a Chinese steel grade of Low Alloy High Strength Structural Steel, Yield Strength is 420 MPa, parameters are tested with 16mm diameter steel bars or steel plates, and tensile strength is 520-680 Mpa, the material density is 7.85 g/cm3. According to GB/T 1591-2008, Q420 has 5 quality levels: Q420A, Q420B, Q420C, Q420D and Q420E. For Q420 steel equivalent, chemical composition and mechanical properties, please see the tables below content.
Features and Uses
Q420 steel has high strength, especially in normalized or normalized plus tempered state, with high comprehensive mechanical properties, can be used in large ships, bridges, power station equipment, medium and high pressure boilers, high pressure vessels, lifting machinery, mining machinery and other large welded structural parts.

Chemical composition & Mechanical property

Chemical Composition of Q420 Steel

		Chemical Composition % (GB/T 1591 – 2008)
Steel Grade	Grade	C (≤)	Si (≤)	Mn (≤)	P (≤)	S (≤)	Nb (≤)	V (≤)	Ti (≤)	Cr (≤)	Ni (≤)	Cu (≤)	N (≤)	Mo (≤)	B (≤)	Als (≥)
Q420	Q420A	0.20	0.50	1.70	0.035	0.035	0.07	0.20	0.20	0.30	0.80	0.30	0.015	0.20	–	–
	Q420B				0.035	0.035										–
	Q420C				0.030	0.030										0.015
	Q420D				0.030	0.025										0.015
	Q420E				0.025	0.020										0.015

		Chemical Composition % (GB/T 1591 – 2018)
Steel Grade	Grade	C (≤)	Si (≤)	Mn (≤)	P (≤)	S (≤)	Nb (≤)	V (≤)	Ti (≤)	Cr (≤)	Ni (≤)	Cu (≤)	N (≤)	Mo (≤)	B (≤)
Q420	Q420B	0.20	0.55	1.70	0.035	0.035	0.05	0.13	0.05	0.30	0.80	0.40	0.015	0.20	–
	Q420C				0.030	0.030

Table-2, Carbon Equivalent Value (CEV)
Steel delivered in hot rolled state (based on smelting analysis)

		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
Q420	Q420B	0.45 (CEV)	0.47	0.48	0.49	–
	Q420C

Table-3, Q420 Steel Mechanical Properties (Hot rolled)

		Thickness or Dia. (Ø) mm; Yield Strength (≥N/mm2)
Steel Grade	Quality	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
Q420	Q420B	420	410	390	370	370	350	–	–	–
	Q420C

		Dia. (Ø) mm; Tensile Strength (N/mm2)
Steel Grade	Quality Level	Ø≤100	100 < Ø ≤ 150	150 < Ø ≤ 250	250 < Ø ≤ 400
Q420	Q420B	520 – 680	500 – 650	–	–
	Q420C

Table-4, Elongation

		Dia. (Ø) mm; Elongation (%)
Steel Grade	Sample direction	Ø≤40	40 < Ø ≤ 63	63 < Ø ≤ 100	100 < Ø ≤ 150	150 < Ø ≤ 200	250 < Ø ≤ 400
Q420	Horizontal	20	19	19	18	–	–
Q420	Vertical	21	20	20	19	–	–

Q420 steel equivalent to US ASTM, European EN, Germany DIN, Japan JIS, France NF, UK BS and ISO standard (For reference purposes only)

China

USA

Germany

Japanese

France

ISO

Standard

Grade

Standard

Grade

Standard

Grade

Standard

Grade

Standard

Grade

Standard

Grade

Standard

Grade

GB/T 1591 – 2008

Q420A

ASTM A572M,
ASTM A633M

Gr.60,
Gr.E

NF A36-201

E420-1

ISO 4996,
ISO 4951

HS420D
E420CC

GB/T 1591 – 2008

Q420B

ASTM A572M,
ASTM A633M

Gr.60,
Gr.E

DIN EN 10113-2,
DIN EN 10113-3

S420NL,
S420ML

JIS G3124

SEV295,
SEV345

NF EN 10113-2,
NF EN 10113-3

S420NL,
S420ML

BS EN 10113-2,
BS EN 10113-3

S420NL
S420ML

ISO 4996,
ISO 4951

HS420D
E420CC

GB/T 1591 – 2008

Q420C

ASTM A678M,
ASTM A656M

Gr.B,
TyPe7

DIN EN 10113-2,
DIN EN 10113-3

S420NL,
S420ML

JIS G3124

SEV295,
SEV345

NF EN 10113-2,
NF EN 10113-3

S420NL,
S420ML

BS EN 10113-2,
BS EN 10113-3

S420NL
S420ML

ISO 4996,
ISO 4951

HS420D
E420CC

GB/T1591 – 2008

Q420D

ASTM A678M,
ASTM A656M

Gr.B,
TyPe7

DIN EN 10113-2,
DIN EN 10113-3

S420NL,
S420ML

JIS G3124

SEV295,
SEV345

NF EN 10113-2,
NF EN 10113-3

S420NL,
S420ML

BS EN 10113-2,
BS EN 10113-3

S420NL
S420ML

GB/T1591 – 2008

Q420E

ASTM A678M,
ASTM A656M

Gr.B,
TyPe7

DIN EN 10113-2,
DIN EN 10113-3

S420NL,
S420ML

JIS G3124

SEV295,
SEV345

NF EN 10113-2,
NF EN 10113-3

S420NL,
S420ML

BS EN 10113-2,
BS EN 10113-3

S420NL
S420ML

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Factory appearance and appearance

The company mainly engaged in steel production, sales and other businesses. The main products include all kinds of steel plate, steel pipe, bar, profile and other materials and section steel. At the same time is a number of domestic large steel mill level agents, with a certain price advantage.

Packing and delivery

For many years, the company has been established, adhering to the purpose of "respecting contract, keeping faith, customer first, reputation first, quality first", adhering to the customer demand as the center, to "achieve what customers think, think what customers think" business philosophy, to "one sale, small profit, real price, timely delivery" business principle, we manage all kinds of specifications and materials of steel pipe and profile for customers.

Application field

The main supply fields are: aerospace, national defense equipment, military weapons, chemical industry, shipbuilding, nuclear energy, trains, containers, environmental protection, precision machining, auto parts, machinery, electronic products, molds, medical treatment Equipment, construction, decoration, etc.

Customer Visit Feedback

Over the years since its establishment, the company has been adhering to the purpose of "honoring contract, keeping faith, customer first, reputation first, quality first", adhering to the customer demand as the center, to "reach customer think, think customer think" business philosophy.

CERTIFICATE OF HONOR

WELCOME TO INQUIRE

The company guarantees the quality of its products with its strong financial strength, advanced management experience and strict quality control system for incoming goods. Excellent products and good reputation are well-known all over the country, and have won the trust and support of major steel mills and customers. Welcome to inquire, negotiate or visit our company in person. Welcome to inquire, negotiate or visit our company in person.

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FAQ

Q1:Will you offer samples?

A:Yes. We will provide samples according to your needs and send them out within three days after receiving payment.

Q2 : What product information do I need to provide?

A : Please kindly provide the grade, width, thickness, surface treatment requirement should you have and quantities you need to purchase.

Q3 : It's my first time to import steel products, can you help me with it?

A : Sure,we have agent to arrange the shipment, we will do it together with you.

Q4:Do you have the products in stock?

A:We have the products in stock. Also, we can produce for your order.

Q5:Do you offer after-sales services?

A : Of course. We have a perfect after-sales service system, if you have any questions, please feel free to contact us. We will do it to your satisfaction.

Q6:What kind of work does your company do?

A:Our company is a professional manufacturer. We mainly produce stainless steel plate/coil/round rod, carbon steel plate/coil,galvanized plate/coil, PPGI coil, roofing sheet and so on.

Q7:What are the advantages of your company？

A : We have international advanced production equipment, large factory buildings, strong company strength, perfect products and reliable quality.

Q8 : Are you a factory or trading company?

A : We are a professional steel factory with many years of experience, perfect manufacturing process, quality assurance!

Carbon steel plate