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| Customization: | Available |
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| Type: | Stainless Steel Bars |
| Standard: | ASTM, AISI, GB, JIS, DIN |
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440F stainless steel is a high-carbon martensitic stainless steel meant to provide improved machinability and corrosion resistance. An excellent choice for applications where good hardness, wear resistance, and moderate corrosion resistance are required. 440F has a very high sulfur content, which aids in machinability; therefore, it is useful for precision machining and automated work processes, and has better machinability than other steels in the 440 series.
| Execution standard | ZEICIN Grade | GB | ASTM | JIS | DIN |
| GB | SUS440F | Y108Cr17 (Y11Cr17) | S44020/440F | SUS440F | 1.4025 |
| C | Cr | Mn | Si | Mo | V |
| 0.95~1.20 | 16.00~18.00 | ≤1.25 | ≤1.00 | ≤0.75 | - |
| Co | S | P | Ni | Nb | W |
| - | ≥0.15 | ≤0.06 | ≤0.60 | - | - |
| Heat Treatment | Temperature | Procedure | Effect |
| Annealing | 843~871°C | Soak at this temperature, furnace cool | Reduces hardness,improves machinability |
| Tempering | 179~177°C | Soak for 1 hour this temperature | Achieves minimumu hardness of Rc 56 |
| Hardening | 1010~1066°C | Soak at this temperature, air cool or warm oil quench | Increases hardness and strength enhances wear resistance |
Production process
Photo1(Domestic). Carbon carbide size obviously appears big size.
Photo 2 (abroad), the carbide distribution is uneven, and the individual is large. Reason analysis: During the smelting process, the carbide can not be controlled well. In the late forging, although the forging ratio increases, it fails to make up for the defects of the smelting.
Photo3(ZhengDa=Zeicin) the modification of three technological processes of 1)EAF+LF+VD, 2) Special innovation smelting process of RS ESR, 3) transformation forging, so that it is obviously better than the imported ones. The carbide is small and uniform.
Photo 1 (domestic), the carbide individual is obviously large, and the processing will exhibit the phenomenon of detachment.
Photo 2 (abroad), The carbides are superior to domestic ones, but there are more angular carbides, and cracks and stress concentrations are easy to occur in use, leading to early failure.
Photo3(ZhengDa=Zeicin), the modification in the process of smelting and forging, the level of carbide is obviously superior to the imports.
Photo 1 (domestic), Zonal carbides are obvious; the carbide particles are obviously larger than the longitudinal ones, causing analysis: no modification of forging, just rolling directly.
Photo 2 (abroad), the distribution of carbides is not uniform, and the individual is large. Reason analysis: During the smelting process, the carbide can not be controlled well. In the late forging, although the forging ratio increases, it fails to make up for the defects of the smelting.
Photo3(ZhengDa=Zeicin) the modification of three technological processes of 1) EAF +LF+VD, 2) Special innovation smelting process of RS ESR, 3) transformation forging, so that it keeps obviously better than the imported ones. The carbide is small and uniform.
| Type | ZEICIN GRADE | SIMILAR STEEL GRADES | |||
| GB | JIS | ASTM | DIN | ||
| Martensite Stainless Steel | 9Cr18Mo | 9Cr18Mo | SUS440C | AISI 440C | 1.4125 |
| 9Cr18MoV | 9Cr18MoV | SUS440B | AISI 440B | 1.4112 | |
| 11Cr17 | 11Cr17 | SUS440C | AISI 440C | 1.4125 | |
| SUS440A | 68Cr17(7Cr17) | SUS440A | S44002 | 1.4109 | |
| 10Cr15Comav | 10Cr15Comav | VG10 | / | / | |
| 5Cr15MoV | 5Cr15MoV | 420hc | 420MOV | W1.4116(X50CrMoV15) | |
| 7Cr17MoV | 7Cr17MoV | SUS440A/AUS6 | 440A | / | |
| SUS440F | Y108Cr17 (Y11Cr17) | SUS440F | S44020/440F | 1.4025 | |
| SUS420J2 | 3Cr13 | SUS420J2 | S42000/420 | X30Cr13/1.4028 | |
| VG10 | / | VG10 | / | / | |
| BG42 | BG42 | / | / | / | |
| YTG134 | 4Cr13 | SUS420 | 420* | 1.2083 | |
1) Fasteners:
Parts that require tight tolerances and polished surfaces.
Q1: Do you accept trial orders?
A1: Yes, we accept trial orders, provided that the required size and model are in stock.
Q2: What is your delivery time?
A2: If the products are in stock, the delivery time is generally 5-15 days. If the products are out of stock, the delivery time may range from 15 to 20 days, depending on the order quantity.
Q3: Do you offer discounts for bulk orders?
A3: Yes, we offer discounts for bulk orders. The specific discount will depend on the order quantity and the terms of cooperation. Please feel free to contact us for more details.
Q4: What is your product packaging like?
A4: Our products are packaged in standard industrial packaging to ensure safety during transportation. If you have specific packaging requirements, please let us know when placing the order, and we will package your items accordingly.
Q5: What payment methods do you support?
A5: We accept a variety of payment methods, including T/T, L/C, Alipay, PayPal, etc. The specific payment method can be arranged flexibly based on the order amount and customer needs.
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