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Q420 steel plate
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Q420 steel plate
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 |
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| 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 video
Shandong Mingding Supply Chain Management Service Co., Ltd. was established in 2013, focusing on the production, processing and trade of metal materials. We have a professional team to provide quality service, we sincerely welcome customers at home and abroad to visit our company for guidance and long-term cooperation.
Warehouse storage
The company has the most advanced production equipment and automatic control system, to ensure the most reliable product quality. In addition, we also have a professional international trade and logistics team. With quality products and excellent service, we have established a large number of long-term customers all over the world.
Packing and delivery
To better ensure the safety of your goods, professional, environmentally friendly, convenient and efficient packaging services will be provided.
Production Technology
Our main products include high quality carbon steel, stainless steel products,galvanized steel products, aluminum and copper. We can also provide cutting, punching, bending, polishing, shearing, wire drawing and other related service.
Honor
Application
Our company is set production processing and trade as one. The company has the most advanced production equipment and automatic control system, to ensure reliable product quality and sufficient supply capacity. Our main products are stainless steel, silicon steel, galvanized steel, carbon steel, aluminum products and other series. Applicable to engineering, coal mining, shipping, aviation, boiler, machinery, military and other fields. We sincerely welcome customers from all over the world to visit our company to discuss long-term cooperation.
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FAQ
How do you package the product?
The inner layer is covered with waterproof paper, packed in iron and secured by fumigated wooden brackets. It can effectively protect products from corrosion in the process of sea sample transportation.
Are the products inspected before shipment?
Of course. All our products go through strict quality tests before they are packed. Those that fail will be destroyed.
Can I visit your factory?
Of course. We welcome customers from all over the world to visit our factory.
What certifications have your products passed?
We have ISO 9001, SGS, EWC and other certifications.
Can you provide samples?
Of course, we can send samples all over the world. Our samples are free of charge, but the customer needs to bear the Courier charge
What is the loading port?
Normally, we ship from Shanghai, Tianjin, Qingdao and Ningbo ports. You can choose other ports according to your needs.
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