S143
2026-08-05 09:02:00 Origin： Remark：0 Click：
Martensitic heat resisting steel S143 round bar, flat bar, forgings FV520B ESR ingot, S143 bolts, heat treated for gas turbine parts processing
TECHNICAL DATA SHEET - S143
Material category: aerospace "S" Series alloy steel
Offiicial test report: issued by TUV - SGS - CNAS
Typical chemical compositions (mass fraction %)
Carbon, C (％): ≤ 0.07
Silicon, Si (％): ≤ 0.60
Manganese, Mn (％): ≤ 1.00
Phosphorus, P (％): ≤ 0.035
Sulfur, S (％): ≤ 0.025
Chromium, Cr (％): 13.2 ~ 14.7
Nickel, Ni (％): 5.00 ~ 5.80
Molybdenum, Mo (％): 1.20 ~ 2.00
Silicon, Si (％): ≤ 0.60
Manganese, Mn (％): ≤ 1.00
Phosphorus, P (％): ≤ 0.035
Sulfur, S (％): ≤ 0.025
Chromium, Cr (％): 13.2 ~ 14.7
Nickel, Ni (％): 5.00 ~ 5.80
Molybdenum, Mo (％): 1.20 ~ 2.00
Niobium, Nb (%): 0.10 ~ 0.50
Copper, Cu (％): 1.20 ~ 2.00
MECHANICAL PROPERTIES UNDER ROOM TEMP.
Heat treatment temperature and cooling
Final Heat treatment: solution 1050℃ + aged 620℃
Tensile strength, Rm ≥ MPa: 930 ~ 1080
Tensile strength, Rm ≥ MPa: 930 ~ 1080
Yield strength, Rp0.2 ≥ MPa: 780
Elongation, A5 (%) ≥: 15.0
Elongation, A5 (%) ≥: 15.0
Impact strength, Akv: 40J Min.
Hardness ≤ HBW: 277 ~ 341
Hardness ≤ HBW: 277 ~ 341
Final Heat treatment: solution 1050℃ + aged 550℃
Tensile strength, σb ≥ MPa: 1270 ~ 1470
Tensile strength, σb ≥ MPa: 1270 ~ 1470
Yield strength, σ0.2 ≥ MPa: 1030
Elongation, δ5 (%) ≥: 10.0
Hardness ≤ HBW: 375 ~ 429
Elongation, δ5 (%) ≥: 10.0
Hardness ≤ HBW: 375 ~ 429
PRODUCT DESCRIPTION
The alloy S143 is usually produced by BEF AOD / 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 bright in the annealed condition.
Final heat treatment - solution treatment + aged.
The alloy S143 is usually produced by BEF AOD / 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 bright in the annealed condition.
Final heat treatment - solution treatment + aged.
PROFILE AND DIMENSIONS
Rod & round bar & disc (diameter): 6.0 ~ 900 mm
Square bar & flat bar: 10 ~ 600 mm
Length: random length or based on the customer's special requirement.
Square bar & flat bar: 10 ~ 600 mm
Length: random length or based on the customer's special requirement.
Heavy / middle plate via hot rolled: T7 ~ 300 X W15 ~ 1000 X L1000 ~ 5000 mm
Sheet steel via cold rolled: T0.5 ~ 6 X W10 ~ 1000 X L1000 ~ 2000 mm
Forging piece: stepped shafts, other different shapes based on OEM.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry, pleased to EMAIL (sales@ccsteels.com) our resident team of qualified production engineers.
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