ASTM A890 Grade 1B
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MATERIAL DATA SHEET - ASTM A890 Grade 1B

MATERIAL CATEGORY - Duplex stainless steel - 25Cr-5Ni-2Mo-3Cu
MATERIAL SPECIFICATIONS - ASTM A890
CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％):  ≤ 0.04
Silicon, Si (％):   ≤ 1.00
Manganese, Mn (％):   ≤ 1.00
Phosphorus, P (％)≤:   0.040
Sulfur, S (％)≤:  0.040
Nickel, Ni (％):   4.75 ~ 6.00
Chromium, Cr (％):  24.5 ~ 26.5
Molybdenum, Mo (％):  1.75 ~ 2.25
Copper, Cu (%):  2.75 ~ 3.30, N (%): 0.10 ~ 0.25
MECHANICAL PROPERTIES FINAL HEAT TREATMENT 
Condition: solution, annealed
Tensile strength, σb/MPa: ≥ 689
Yield strength, σ0.2/MPa:  ≥483
Elongation, δ (％): 16.0
Reduction of area, ф (％): -
Hardness | HRB:  -
Stainless Steel Rod, Bar, Wire, Cold drawn, ground and polished
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.
PRODUCT DESCRIPTION
The alloy is usually produced by AOD / VOD / EAF 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
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.
PRODUCT PROFILE & DIMENSIONS
Round bar / Disc (diameter): 5.5mm to 550mm
Square bar / flat bar: 10mm to 600mm
Plate / Sheet steel / Steel strip: 0.1mm to 1000mm
Width: 8mm to 1000mm
Length: random length or based on the customer's special requirement.
Forged steel shape: stepped shafts, and other different shapes based on OEM.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineers. Email: sales@ccsteels.com