51Cr8Si2
2025-02-08 10:44:00 Origin： Remark：0 Click：
GB/T 12773-2008 Valve Steel and Superalloy bars for Internal Combustion Engines 51Cr8Si2 Round bar, Rod, Forgings Stock Available 51Cr8Si2 Heat treated
TECHNICAL DATA SHEET - GB 51Cr8Si2
MATERIAL SPECIFICATION - GB/T 12773 - 2008
Valve steel and superalloy bars for internal combustion engines
1S0 683-15:1992,Heat-treatable steels,alloy steels and free-cutting steels,
Part 15:Valve steels for internal combustion engines,MOD
Material Category: Martensitic type
Special Melting Practice - BEF + AOD / + ESR / EAF
Stock Available - Round bar Diam. 12.0 ~ 40mm
HS Code - 72223000 / 72224000
PRODUCT DESCRIPTION
The alloy 51Cr8Si2 is usually produced by EAF / AOD / BEF 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 in the annealed condition.
Final heat treatment - Quenched and tempered
PROFILE & DIMENSIONS & PROCESSING SERVICE
Rod / round bar (diameter): 5.0 ~ 180mm
Length: Fixed length or random length or based on the customer's special requirement.
Sheet steel via cold rolled: T0.5 - 6 X W60 ~ 1000 X Lmm
Steel strip via cold rolled: T0.5 - 3 X W5 - 300 X L (or in coil form)
Forging piece: stepped shafts, other different shapes based on OEM.
Carbon, C (％): 0.47 ~ 0.55
Silicon, Si (％): 1.00 ~ 2.00
Manganese, Mn (％): 0.20 ~ 0.60
Manganese, Mn (％): 0.20 ~ 0.60
Phosphorus, P (％) ≤: 0.040
Sulfur, S (％) ≤: 0.030
Nickel, Ni (％): ≤ 0.60
Sulfur, S (％) ≤: 0.030
Nickel, Ni (％): ≤ 0.60
Chromium, Cr (％): 7.50 ~ 9.50
Molybdenum, Mo (％): -
Molybdenum, Mo (％): -
Copper, Cu (%): ≤ 0.30
Nitrogen, N (%): -
Ferrum, Fe (%): balance.
MECHANICAL PROPERTY AT ROOM TEMPERATURE
Forms: Round bar, rod
Heat treatment practice: annealing 1000 ~ 1050 ℃, oil cooling, tempered 650 ~ 750 ℃, air cooled.
Tensile strength, Rm ≥ MPa: 885
Yield strength, Rp0.2 ≥ MPa: 685
Yield strength, Rp0.2 ≥ MPa: 685
Elongation, A5 ≥ (％): 14.0
Reduction of area, Z ≥ (％): 35.0
Hardness via heat treatment / HBW.: 260 min.
Reduction of area, Z ≥ (％): 35.0
Hardness via heat treatment / HBW.: 260 min.
Hardness via annealing / HBW.: 269 Max.
TECHNICAL SALES ASSISTANCE & SERVICE
20+ years Focus On Special Steel Manufacturing and processing.
Stock over 60 grades with a competitive price, along with cutting service for specific requirement.
Customizing special material is welcome.
If you are interested in our products or services, or would like to learn more about us, pleased to EMAIL (sales@ccsteels.com) our qualified production engineers or sales department.
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