FV520B & FV520 Martensitic Aged Stainless Steel
FV520B is A Precipitation Hardening Martensitic Stainless steel with an addition of Nb/Cu elements. FV520 Combines High Strength, hardness (up to HRC38), and corrosion resistance. Mechanical properties at RM can be optimized with final age treatment.
| Product parameters | |
| Material Category:: | Martensitic PH Stainelss Steel |
| Terms of Price:: | Ex-work, CFR, CIF |
| Melting Process Route:: | EAF + VD + LF / BEF + ESR / VAR |
| Min. order quantity Per Batch:: | 3300 KG |
| Heat Treatment Practice:: | Solution annealed 1040 ℃, water, oil or air cooled, aged 550 ~ 620 ℃, air cooled |
| Ultrasonic Test Standard:: | ASTM E2375 / MIL-STD- AMS 2154 / SEP 1923 / GB/T 4162 / EN 10228-3 / EN 10308 |
| Standard Export Packing Way:: | Wooden box, pallet / tray free from fumigation |
| Production Lead Time:: | Within 55 days after 30% deposit prepayable |
Description
Product Descriptiion
Grade FV520B Stainless steel is Martensitic Stainless steel that should be precipitation hardened to achieve excellent mechanical properties by different age treatments. Alloy FV520 achieved high strength and hardness after final age treatment.
The alloy is usually produced by AOD / VD / VIM followed by electroslag refining (ESR) / VAR if necessary for special purpose. Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different levels according to the buyers' requirements.
Bars are usually supplied black / bright in the annealed condition.
Final heat treatment - solution treatment / Aged treated.
Chemical Composition (Mass weight - %) - Grade FV520B
Carbon, C (％): ≤ 0.07
Silicon, Si (％): ≤ 0.70
Manganese, Mn (％): ≤ 1.00
Phosphorus, P (％)≤: 0.035
Sulfur, S (％)≤: 0.025
Chromium, Cr (％): 13.0 ~ 15.0
Nickel, Ni (％): 5.00 ~ 6.50
Molybdenum, Mo (％): 1.20 ~ 2.00
Copper, Cu (％): 1.20 ~ 2.00
Niobium, Nb(%): 0.15 ~ 0.60
Mechanical Properties Under Special Heat treatment Practice
Form available: Round bar, flat bar, forgings
Condition: double overaged,1050º C +2 hours 750 - 850 ºC,+2 hours 750 - 850 ºC
Proof stress (N/mm²): 800
Tensile strength, σb/MPa: 925 ~ 1050
Yield strength, σ0.2/MPa: 375
Elongation, δ (％): 15.0
Hardness | HB: 277 ~ 355
Impact strength, AKv /Min: 40
Metals, Stocklist and Services
Stock over 50 grades with a competitive price, along with cutting service for specific requirement.
With extensive Stock with a prompt delivery, Customizing special material is welcome.
