S99D / S99G
2022-05-03 16:07:20 Origin： Remark：0 Click：
MATERIAL CATEGORY - Aircraft "S" series alloy structural steel
TYPE OF STEEL - Middle-carbon 2.5% Ni-Cr-Mo steel
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - BV
MELTING PROCESS - EAF +LF + VD / BEF + ESR
H S CODE For Customs - 7228 4000 / 7228 5000 / 7228 6000
CHEMICAL COMPOSITION (mass weight %)
Carbon, C (％): 0.36 ~ 0.44
Manganese, Mn (％): 0.45 ~ 0.70
Phosphorus, P (％)≤: 0.035
Sulfur, S (％)≤: 0.030
Chromium, Cr (％): 0.50 ~ 0.80
Nickel, Ni (%): 2.30 ~ 2.80
Molybdenum, Mo (％): 0.45 ~ 0.65
TYPICAL MECHANICAL PROPERTIES
Condition: Heat treatment
Tensile strength σb≥/MPa: 1210 ~ 1450
Yield strength σs≥/MPa: 1050
Elongation δ5≥(%): 8.0
Impact strength, AKv≥/J: 28
Hardness HBS: HB 285 max. under annealed condition
High room and elevated temperature strength, High notch tolerance.
Thermal expansion coefficients compatible with low alloy steel turbine casing materials.
Lower design and operating risks
Simplified design for bolting configuration compared with martensitic steels or high nickel alloys.
Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different level according to the buyers' requirements.
Bars are usually supplied bright in the annealed condition, or bright annealing specially.
Final heat treatment - heat treatment / Quenched and Tempered.
PROFILE & DIMENSIONS AVAILABLE
Round bar / Wire rod (Diameter): 5.5 to 500mm
Square bar / Flat bar: 10 to 800mm
Length: Fixed length or random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T20 - 450mm X W100 ~ 1000mm X L1000 ~ 4000mm
Forging piece: stepped shafts, 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. E-mail: firstname.lastname@example.org.