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| Customization: | Available |
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| Type: | Stainless Steel Bars |
| Standard: | GB |
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AISI 420 / S42000 - Versatile Martensitic Stainless Steel for Industrial Use
| Execution standard | ZEICIN Grade | GB | AISI | JIS | DIN |
| GB | S42000 | 20Cr13/2Cr13 | 420 | SUS420J1 | X20Cr13/1.4021 |
| C | Si | Mn | P | C | Sr |
| ≥0.15 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 12.00-14.00 |
Subcritical Annealing
675-760 °C, hold as needed
Resulting hardness: 94-97 HRB
Recrystallization Annealing
Heat to 830-850 °C, hold until fully recrystallized
Furnace cool to 790 °C, then slow cool (15-20 °C/h) to 595 °C
Air cools to room temperature
Resulting hardness: 86-95 HRB
Isothermal Annealing
Heat to 830-850 °C, then hold 2 h at 705 °C
Air cools to room temperature
Resulting hardness: < 95 HRB
Quenching (Hardening)
Heat to 1000-1050 °C, then water or oil quench
Resulting hardness: 47-49 HRC
Tempering
600-750 °C, fast cool to room temperature
Resulting hardness: 25-40 HRC
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 | |
AISI 420 (S42000) - Brief Overview & Key Applications
AISI 420 is a high-carbon martensitic stainless steel that offers greater strength and hardness than AISI 410, while its toughness and corrosion resistance are slightly reduced. It is primarily used for high-stress components such as:
Steam turbine blades, thermal-oil pump impellers, shafts, and bushings
Hydraulic-press valve plates and other rotating parts
Additionally, AISI 420 finds applications in:
Paper-industry equipment: cutting knives and doctor blades
Medical instruments: scalpels and forceps
Consumer goods: kitchen knives and tableware
With its excellent hardness, wear resistance, and polishability, AISI 420 is widely employed across both industrial and consumer sectors.
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 15-20 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 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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