What is 1.4021 QT700?
1.4021 QT700 is a martensitic stainless steel with a high chromium content (approximately 12-14%). It is specifically designed for heat treatment processes like quenching and tempering, which enhance its mechanical properties, such as tensile strength and hardness. The name QT700 refers to the grade's strength after tempering, which provides an impressive 700 MPa tensile strength.
The key applications of 1.4021 QT700 include valve components, gear shafts, pumps, and high-strength fasteners in industries like automotive, aerospace, and heavy machinery.
What material is 1.4021 equivalent to?
AISI 420 stainless steel is a martensitic chromium steel, also known as 1.4021, BS 420S37, and X20Cr13. This material can be used at temperatures up to 400°C. Its hardness is ≤230 HB, density is 7.7 kg/dm³ (at room temperature), and tensile strength is 750 to 850 N/mm².
Chemical Composition of 1.4021 QT700
This high chromium content gives it enhanced corrosion resistance and improves its wear properties, making it suitable for parts exposed to high stress and abrasive environments.
| Element | Percentage |
|---|---|
| Carbon (C) | 0.12 – 0.20% |
| Chromium (Cr) | 12.00 – 14.00% |
| Manganese (Mn) | ≤ 1.00% |
| Silicon (Si) | ≤ 1.00% |
| Phosphorus (P) | ≤ 0.040% |
| Sulfur (S) | ≤ 0.030% |
Mechanical Properties of 1.4021 QT700
These mechanical properties make 1.4021 QT700 an excellent choice for applications requiring high strength, resistance to wear, and fatigue resistance. After heat treatment, the material achieves a balance between toughness and hardness, allowing it to withstand harsh operating conditions.
| Property | Value |
|---|---|
| Tensile Strength | 700 MPa (minimum) |
| Yield Strength | 550 MPa (minimum) |
| Elongation | 10% – 15% |
| Hardness | 48 – 52 HRC |
| Impact Strength | 40 J (minimum) |
1.4021 QT700 vs. 1.4021 QT800
The difference between 1.4021 +QT700 and 1.4021 +QT800 is that +QT800 indicates that its minimum tensile strength and yield strength are higher than +QT700, because these values are directly related to the minimum tensile strength (in megapascals) after quenching and tempering. The tempering temperature range of QT800 (600-700℃) is lower than that of QT700 (650-750℃).
pricing for 1.4021 QT700 Stainless Steel
The price of 1.4021 QT700 stainless steel is generally USD 2.50 – 3.00 per kg, depending on factors such as quantity, surface finish, and customization requirements (e.g., machining, polishing).
GNEE Stainless is an independent stockist and processor of 1.4021 stainless steel. With our extensive inventory and exceptional processing capabilities, we can meet most project requirements, whether stock or custom. We offer: stock-sized plate and sheet, stock-length round bar, cut-to-length plate and sheet, cut-to-length round bar, cold forming of plate, sheet, and round bar, and any other necessary processing services. For any questions, Mail:es@gescosteel.com
Packaging and Shipping
To ensure safe delivery of 1.4021 QT700, we provide the following packaging options:
Wooden crates/pallets for bulk orders
PVC shrink wrap to protect against moisture during transit
Edge protectors to prevent damage during handling
All shipments comply with international standards, ensuring that the material reaches customers in optimal condition. Shipping options are available based on your preferred delivery terms (FOB, CIF, or EXW).
