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Q690 High Strength Steel Plate
high tensile steel sheet Product Introduction
Q690 hsla steel is a kind of low alloy high strength structural steel. The Q690 high strength low alloy grade indicates: "Q" represents the yield strength, "690" represents the yield strength of the steel is 690 MPa. Q690 low alloy steel not only has high strength, It also belongs to the category of low carbon steel.
Q690 hsla structural steel materials are divided into different quality grades, including Q690C high strength low alloy steel sheet, Q690D hsla steel sheet and Q690E high strength alloy steel. Among them, "M" stands for "TMCP" (thermo-mechanically controlled processing), which indicates that Q690 high tensile steel is a quenched and tempered steel with good low-temperature properties and impact toughness.
Steel plates made of Q690 high strength low alloy hsla steel material are widely used in coal mining machinery, engineering machinery, heavy-duty vehicles, bridges and pressure vessel plates due to their high yield strength and tensile strength.
As a high-performance steel, Q690 low alloy structural steel has broad application prospects and advantages in different fields. Q690 low alloy structural steel has excellent mechanical properties, corrosion resistance and processing properties that can meet the needs of various complex environments. Stringent requirements provide important support and guarantee for the development of various industries.
high tensile alloy steel Product Details
Q690 High Strength Steel Plate Chemical Composition:
| Steel Grade | Quality Grade | C | Si | Mn | P | S | Nb | V | Ti | Cr | Ni | Cu | N | Mo | B | Al |
| Q690 | C | ≤ 0.18 | ≤ 0.60 | ≤ 2.00 | ≤0.030 | ≤0.030 | ≤ 0.11 | ≤ 0.12 | ≤ 0.20 | ≤ 1.00 | ≤ 0.80 | ≤ 0.80 | ≤ 0.015 | ≤ 0.30 | ≤ 0.004 | ≥ 0.015 |
| D | ≤0.030 | ≤0.025 | ||||||||||||||
| E | ≤0.025 | ≤0.020 |
Q690 High Tensile Steel Plate Mechnical Property:
| Q690 Yield Strength (≥N/mm2); Thickness or Dia. d (mm) | ||||||
| Standard | Steel Grade | Quality | d≤16 | 16<d≤40 | 40<d≤63 | 63<d≤80 |
| GB/T 1591 – 2008 | Q690 | C, D, E | 690 | 670 | 660 | 640 |
| GB/T 1591 – 2018 | Q690M | C, D, E | 690 | 680 | 670 | 650 |
| Q690 Tensile Strength (N/mm2); d (mm) | Elongation | |||||
| Standard | Steel Grade | Quality | d≤40 | 40<d≤63 | 63<d≤80 | % |
| GB/T 1591 – 2008 | Q690 | C, D, E | 770-940 | 750-920 | 730-900 | ≥14 |
| GB/T 1591 – 2018 | Q690M | C, D, E | 770-940 | 750-920 | 730-900 | ≥14 |
Q690 Low Alloy Steel Sheet Charpy Impact Test (V) – Test:
| Grade | Quality Class | Test Temp. (℃) | Thickness | Absorbed Energy (KV2/J) |
| Q690 steel | C | 0 | 12mm-150mm | ≥55 |
| D | -20 | ≥47 | ||
| E | -40 | ≥31 |
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