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Q type steel typically refers to quenched and tempered (Q&T) high-strength low-alloy steels, where "Q" denotes the quenching process that enhances hardness and strength. In the context of ASTM standards, it often points to ASTM A514 Grade Q, a specific grade of Q&T steel known for its high yield strength and toughness in thick plates. This steel is used in applications requiring superior load-bearing capacity, such as offshore platforms and heavy machinery. As a leading manufacturer and exporter, Gangsteel specializes in producing high-quality astm a514 grade q plates, part of our ASTM A514/A514M steel plate lineup, ensuring compliance with international standards for demanding projects.
Q type steel, or quenched steel, undergoes a heat treatment process involving rapid cooling (quenching) after heating to form a hard microstructure, followed by tempering to improve ductility. In Chinese steel standards, "Q" often indicates yield strength (e.g., Q355 for 355 MPa minimum yield), but in ASTM contexts like A514 Grade Q, it emphasizes the quenched and tempered nature for high-performance alloy steel. Gangsteel's Q type plates, such as astm a514 grade q, are engineered for thick sections up to 8", offering excellent weldability and impact resistance.
The composition is tailored for hardenability and strength. Below is the typical composition for ASTM A514 Grade Q (in weight %):
|
Element |
Content (%) |
|---|---|
|
C |
0.14-0.21 |
|
Mn |
0.95-1.30 |
|
P (max) |
0.035 |
|
S (max) |
0.035 |
|
Si |
0.15-0.35 |
|
Ni |
1.20-1.50 |
|
Cr |
1.00-1.50 |
|
Mo |
0.40-0.60 |
|
V |
0.03-0.08 |
|
B |
0.001-0.005 |
Gangsteel's production ensures precise control for optimal properties.
Q type steel like A514 Grade Q exhibits high strength. Typical values:
|
Property |
Value (Up to 2-1/2" Thick) |
Value (>2-1/2" to 6" Thick) |
|---|---|---|
|
Yield Strength (min, ksi/MPa) |
100 / 690 |
90 / 620 |
|
Tensile Strength (ksi/MPa) |
110-130 / 760-895 |
100-130 / 690-895 |
|
Elongation (min, %) |
18 |
16 |
|
Brinell Hardness (HBW) |
235-293 |
235-293 |
Used in offshore drilling, mining equipment, and structural engineering for its durability in thick plates. Gangsteel's astm a514 grade q supports these with reliable supply.
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