ASTM A890 Grade 4A
2014-11-10 14:52:48 Origin： Remark：0 Click：
The alloy is usually produced by AOD / VOD /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 / QT
Black bar /Flat bar / steel strip / square bar
Bright - peeled + polishing, centerless grinding
Forged - ring, tube, pipe casing, discs, shaft
ASTM A959 (2004), A276, A312, A632, A176, A580, A564
CHEMICAL COMPOSITION (WEIGHT %)
Si (％): ≤ 1.00
Mn (％): ≤ 1.50
P (％)≤: 0.040
S (％)≤: 0.020
Ni (％): 4.50 ~ 6.50
Cr (％): 21.0 ~ 23.0
Mo (％): 2.50 ~ 3.50
Elongation, δ (％): 25.0
Reduction of area, ф (％): -
Standard length of bars: 2 - 3 meter.
Austenitic Stainless Steel for implants, with high corrosion resistance.
According to ISO 5832/1, F-138 Vacuum melt grade (VAR)
For surgical instruments, fracture fixation devices, screws for implants and many more similar applications.
HEAT TREATMENT PRACTICE
Heat treatment is only suitable for specific grades of stainless steel. When heat treating a stainless the hardening temperatures, including rate of heating, cooling and soaking times will vary due to several factors such as the shape and size of each component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult with the heat treatment provider for whole guidance on heat treatment of stainless steel grades. We are delighted to help to work with you the special heat treatment based on your special requirements.
Mechanical parts used in the condition of corrosion resistance
Bolt and nut
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineers. Email: firstname.lastname@example.org
Round bar / Wire rod (Diameter): 0.50mm to 3000mm
Square bar / Flat bar: 3mm to 2000mm
Plate / Sheet steel / Steel strip: 0.1mm to 2500mm
Width: 8mm to 2500mm
Length: random length or based on the customer's special requirement.
Forged steel shape: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.
Pipes / Tubings: OD 3-219 mm, with wall thickness ranging from 0.50 to 35 mm.