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AISI 616 & AISI 422 & 1.4935 Turbine Blade Steel

Introduction:
Grade 616 is a hardenable stainless steel designed for use at temperatures of up to 650 ºC. Grade 616 has good resistance to scaling and oxidation. Through heat treatment, high mechanical properties can be developed. Grade 616 is used in applications such as compressors or steam turbines and also in aircraft parts, valves, high temperature bolting, and other mechanical parts used in high temperature circumstances.
The alloy is usually produced by BEF & AOD followed by electroslag remelting (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.
100% Ultrasonic test ASTM E2375 /SAE AMS 2154 /SEP 1923 /GB/T 4162 /EN 10228-3.
Bars are usually supplied black/bright in the annealed condition.

Applications:
Aircraft components
High pressure corrosive fabricated parts such as valves
Shafts, Fasteners, and Fittings and gears

Technical Standard:
ASTM A565

All Grades Comparison
DIN ASTM AISI UNS JIS Other
1.4935
X20CrMoWV12-1
Grade 616 422 S42200 SUH 616 10705BU
AMS 5655

Chemical Composition (Weight %)
C Si Mn P S Cr Ni Mo Other
0.20 ~ 0.25 ≤ 0.50 0.50 ~ 1.00 ≤ 0.025 ≤ 0.025 11.0 ~ 12.5 0.50 ~ 1.00 0.90 ~ 1.25 W 0.90 ~ 1.25
V 0.20 ~ 0.30

Mechanical Properties
Condition of heat treatment Tensile Rm(MPa) Yield Rp0.2(MPa) Elongation
A(%)
Reduction in cross section on fracture
Z (%)
Impact AKV/AKU(J) Brinell Hardness(HBW)
Annealed - - - - - ≤ 248
Hardened 1022℃ ~ 1050℃ air or oil cooled, ≥620℃ X 2H, tempered ≥ 965 ≥ 760 ≥ 13.0 ≥ 30.0 ≥ 11 302 ~ 352
Hardened 1022℃ ~ 1050℃ air or oil cooled, ≥677℃ X 2H, tempered ≥ 825 ≥ 585 ≥ 17.0 ≥ 35.0 ≥ 20 241 ~ 285

Forms and Dimensions:
Round bar (Diameter): 5.5 mm to 700 mm
Square bar / Flat bar: 5mm to 550mm
Steel strip via cold rolled: T0.1 - 3mm X W5 - 650mm X L (or in coil form)
Forged ring: OD200 ~ 1500mm X ID150 ~ 1250mm X H20 ~ 1250mm

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