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Q620E high strength steel plate

Q620E is a quenched and tempered steel plate for high-strength structures. The steel grade consists of the first letter of the Chinese pinyin representing the yield strength, the minimum yield strength value, and the quality grade symbol (C, D, E, F) arranged in order. Example: Q620E. —The first letter of the Chinese pinyin of the word "Qu" in the steel yield strength; 620—the value of the minimum yield strength, in MPa; E—the quality grade symbol.

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High-strength steel plate

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Chemical composition: usually contains carbon (C) ≤ 0.20%, silicon (Si) ≤ 0.80%, manganese (Mn) ≤ 2.00%, phosphorus (P) ≤ 0.020%, sulfur (S) ≤ 0.015%, niobium (Nb) ≤ 0.11%, vanadium (V) ≤ 0.12%, titanium (Ti) ≤ 0.20%, aluminum (Al) ≥ 0.015%, etc.
Implementation standard: GB/T 16270
Mechanical properties: yield strength ≥ 620MPa, tensile strength 720 - 890MPa, elongation ≥ 10%. The low-temperature impact test temperature is -40℃, and the impact absorption energy is not less than 27J.
Delivery status: generally delivered in hot rolling, controlled rolling, normalizing, quenching and tempering.
Features: High strength: has extremely high load-bearing capacity and can meet the structural requirements of extreme heavy loads.
Excellent low-temperature toughness: can still maintain good mechanical properties in severe cold environments.
Application areas: Engineering machinery under extreme working conditions: such as large cranes for polar operations.
Large bridges in high-cold areas: ensure the structural safety of bridges under low temperature conditions.
Marine engineering: plays an important role in key parts of marine platforms in cold waters.

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High-strength steel plate