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Q420 steel plate
Product Details
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 | – | – |
| 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 | UK | 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 |
||
Factory profile
Adhering to the tenet of "integrity first, quality for survival", the company has established a complete marketing channel of "based in North China, radiating the whole country, and facing the world", and has not only established a solid strategic partnership with many domestic and foreign enterprises.We have been committed to product development, production and sales, after more than ten years of efforts, our products have been widely used in various fields.
Packing method: Packing according to customer's requirement.
The company has more than 110,000 square meters of production and processing base, fully introduced the international advanced modern automatic production and processing equipment, and took the lead in passing the ISO9001, TS16949, BV, SGS and other international well-known institutions certification.The products are mainly exported to Italy, Mexico, South Korea, Israel, Turkey, India, Pakistan, Kyrgyzstan, Oman, Kazakhstan, Vietnam, Myanmar and other countries. The company's supply is sufficient, the variety is complete, order production is fast, welcome domestic and foreign manufacturers, traders to contact us.
Company Advantages
1. We are a large-scale production enterprise integrating production, research and development, and can customize the products required by customers.
2. We have a perfect after-sales service system, which can track the problems encountered by customers in production at any time and provide corresponding technical support, so as to share our high-quality resources with customers.
3. After more than ten years of development, the company has complete product varieties and large inventory, which can be delivered in the shortest time.
4. Free samples are available.
5. With obvious price advantage, the company has complete production process, from raw materials to finished products integrated production can maximize the cost savings.
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APPLICATION FIELD
Steel Structure
Steel Structure
Petroleum
Petroleum
Boiler
Boiler
Architecture
Architecture
A Ship
A Ship
Bridge
Bridge
Chemical Plant
Chemical Plant
Oceanographic Engineering
Oceanographic Engineering
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