1.4472 Stainless Steel
1.4427 Stainless Steel is a premium implant-grade alloy ideal for load-bearing applications where strength, corrosion resistance, and biocompatibility are critical. Its nitrogen-enhanced composition addresses the limitations of traditional 316L stainless steel.
1.4427 Stainless Steel offers better tensile strength, wear resistance, and resistance to pitting and crevice corrosion than the 316LVM grade. Obtained through slag remelting, this grade contains no ferrite, and the inclusion cleanliness of its microstructure makes it non-magnetic and biocompatible with human tissue. This stainless steel alloy is used in the manufacture of heavy-use orthopaedic implants and osteosynthesis devices, such as very thin screws or high-mobility prosthesis.
1.4472 implant grade stainless steel combines excellent corrosion resistance with good mechanical properties. Due to the stringent production process (consumable electrode remelting), a high quality, surgical implant grade is achieved and due to the absence of ferrite is entirely non-magnetic.
1.4427 Stainless Steel Advantages
Yield strength (up to) twice higher than 316LVM in annealed condition
High corrosion resistance
Good forgeability
Chemical Composition
|
Weight % |
C |
Ni |
Cr |
Mo |
Mn |
N |
Fe |
|
1.4472 Implant Grade |
≤0.06 |
9.5 |
21 |
2.2 |
4 |
0.4 |
Bal |
|
ASTM F1586 |
≤0.06 |
9.5 |
21 |
2.2 |
4 |
0.4 |
Bal |
Mechanical Properties
|
Grade |
Condition |
UTS (N/mm2) |
0.2% Yield Strength |
Elongation A (%) |
|
1.4472 Implant |
Sol Trtd |
35-45 |
20 |
15 |
-
Designation & Standards
ISO 5832 9: Specifies high-nitrogen stainless steel for surgical implants.
ASTM F1586: This covers wrought nitrogen-strengthened alloy for surgical applications.
Common names: "Orthopedic stainless steel" or "high-nitrogen 21Cr-10Ni-3Mn-2.5Mo."
-
Applications
Orthopedic implants: Bone screws, plates, intramedullary nails.
Joint replacements: Temporary components (e.g., hip nails).
Dental devices: Orthodontic wires (less common than titanium).
-
Properties
Mechanical Strength: Higher yield strength than 316L (e.g., ~550 MPa vs. ~300 MPa) due to nitrogen.
Corrosion Resistance: Superior in saline/chloride environments (critical for bodily fluids).
Biocompatibility: Passes ISO 10993 tests (cytotoxicity, sensitization).
Non-Magnetic: Austenitic structure ensures MRI compatibility.
Forgeability
The grade can be hot forged in the temperature range 1000/1150°C.
Polishability
The high level of inclusionary cleanliness and the homogeneity of the microstructure of this grade allows optimum polishing.
Typical Heat Treatments
Annealing at 1050-1080°C followed by rapid quenching can be carried out after forging to restore corrosion resistance, but no heat treatment is used to harden the grade.
Corrosion resistance
The grade is highly resistant to general and pitting corrosion due to its high molybdenum and nitrogen content combined with its low inclusion rate.
Standard Sizes
Round bars are annealed, medium-hard or hard depending on the diameter – Surface ground or peeled.
Flat bars made to measure in the annealed condition (consult us)
Other formats: please contact us
Manufacturing Process
Main Applications
Packaging & Shipping
FAQS
If you have any other questions, please contact me!
Q: Can you produce nickel alloy bars?
A: Yes, we can produce nickel alloy bars according to your requirements.
Q: What is your minimum order quantity?
A: Our minimum order quantity is 50 kg. Larger quantity, lower price.
Q: How long is your delivery time?
A: Generally delivery time for stock is 3 days, and customization takes 15 working days or more, but it is also affected by your specific requirements or order quantity.
Q: Can you provide samples?
A: For small parts, we can provide free sample of regular sizes, but the shipping costs will be borne by you. For large parts sample, we will include it in the order amount. Please confirm with our sales department for your specific requirements.
Q: How can l quickly get the price list?
A: Directly send us email with detailed specification, and you will get the official price list in 1 hour.
Q: How do you control product quality?
A: From the selection of raw materials to transportation packaging, every production process will be testing and evaluated. Only products that have passed all tests can be delivered for export.
Q: Can you provide processing services?
A: Yes, we also provide processing services to our customers. It is one of our goals to provide specialized services such as bending, water cutting, laser cutting, digging holes, welding, slitting of coils, and other fabrications according to the drawings.
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