|
Still deciding? Get samples of $ !
Request Sample
|
| Customization: | Available |
|---|---|
| Type: | Stainless Steel Sheets |
| Standard: | ASTM, AISI, GB, JIS, DIN |
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
9Cr18Mo and SUS440C martensitic stainless steels are high-carbon, high-chromium alloys known for their excellent hardness, superior wear resistance, and strong corrosion resistance. These materials are widely used in the manufacture of cutting tools, industrial blades, scissors, surgical instruments, and precision mechanical components.
Thanks to their outstanding cutting-edge retention, corrosion resistance, and toughness, 9Cr18Mo and SUS440C stainless steels are especially suitable for applications requiring both durability and sharpness. Their ability to be heat-treated to high hardness while maintaining excellent mechanical properties makes them ideal materials for high-performance cutting tools and medical instruments.
| ZEICIN Grade | GB | ASTM | JIS | DIN |
| ZDF-9(9Cr18Mo) | 9Cr18Mo | AISI 440C | SUS440C | 1.4125 |
| C | Cr | Mn | Si | Mo | S | P | Ni |
| 0.95~1.20 | 16.00~18.00 | ≤1.0 | ≤1.0 | 0.40~0.65 | ≤0.03 | ≤0.04 | ≤0.75 |
| # | Name | Specification |
|---|---|---|
| 1 | Steel grade | 9Cr18Mo / AISI440C / SUS440C /1.4125 |
| 2 | Size | Customized size according to customer requirements |
| 3 | Tolerance | According to order |
| 4 | Technique | Special smelting process: EAF+LF+VD+RS ESR process. to Innovating Chinese quality. |
| 5 | Surface | Black surface / Turned Surface |
| 6 | Application | Mechanical cutting tools / Knives / Surgical blades / Bearing rings and balls / Valve parts / Measuring tools / High wear-resistant parts |
| Heat Treatment Method | Process Details | Cooling Method | Hardness (HBS/HRC) |
| Annealing | Heat to 850~870ºC,holding 4~6h, 30ºC/h cooling to 600ºC |
Air cooling | ≤255HBS |
| Recrystallization Annealing | Heat to 730~750°C | Air cooling | - |
| Quenching | Heat to 1050~1100°C | Oil cooling | - |
| Tempering | Heat to 150~160ºC, hold for 2~5h | Air cooling | ≥58HRC |
Production process
| Source | Observation | Reason / Process | Result |
|---|---|---|---|
| Photo 1 (Domestic) | Carbides obviously large | - | Poor carbide morphology |
| Photo 2 (Abroad) | Carbide distribution uneven, some large | Smelting is not well controlled; forging cannot compensate | Defects remain, uneven structure |
| Photo 3 (ZhengDa / Zeicin) | Carbides are small and uniform | 1) EAF+LF+VD 2) RS ESR special smelting 3) Transformation forging | Much better than imported steel |
| Source | Observation | Result |
|---|---|---|
| Photo 1 (Domestic) | Carbides are large and may detach during processing | Poor machinability |
| Photo 2 (Abroad) | Smaller but angular, causing cracks and stress | Early failure |
| Photo 3 (ZhengDa / Zeicin) | Fine, uniform carbides from an improved process | Best performance |
| Source | Observation | Reason / Process | Result |
|---|---|---|---|
| Domestic | Zonal carbides are obvious; particles larger in cross-section than longitudinal | No forging modification, only rolling | Large carbides |
| Abroad | Carbide distribution uneven; some very large | Poor smelting control; later forging cannot fix it. | Defects remain |
| ZhengDa | Carbides small and uniform | 1) EAF+LF+VD 2) RS ESR smelting 3) Transformation forging | Superior to imports |
| 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) Bearing steel ball:
Applications requiring smooth rotation under heavy load and resistance to deformation need 9cri8Mo Bearina steel ballsSteel balls, which are good for high precision, are stable under high speed or heavy load.
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.
){kind=link}