ASTM A768 Grade 4
2019-01-18 13:58:36 Origin： Remark：0 Click：
12% Chromium ASTM A768 Grade 4 forgings for Turbine rotors & shafts, ASTM A768 Grade 4 Round bar, flat bar, plate ESR melting, Hot blooming, UT, Hot forging, Hot rolling, Heat treatment.
TECHNICAL DATA SHEET - ASTM A768 Grade 4
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - BV
MATERIAL CATEGORY: 12% Chromium alloy steel forgings for Turbine rotors and shafts
MATERIAL TECHNICAL STANDARDS: ASTM A768
CHEMICAL COMPOSITION (mass weight %)
Carbon, C (％): 0.05 ~ 0.07
MATERIAL CATEGORY: 12% Chromium alloy steel forgings for Turbine rotors and shafts
MATERIAL TECHNICAL STANDARDS: ASTM A768
CHEMICAL COMPOSITION (mass weight %)
Carbon, C (％): 0.05 ~ 0.07
Silicon, Si (％): 0.30 ~ 0.50
Manganese, Mn (％): 0.70 ~ 1.00
Phosphorus, P (％)≤: 0.015
Sulfur, S (％)≤: 0.012
Chromium, Cr (％): 11.25~ 12.25
Sulfur, S (％)≤: 0.012
Chromium, Cr (％): 11.25~ 12.25
Molybdenum, Mo (％): 0.30 ~ 0.50
Nickel, Ni (%): 3.50 ~ 4.25
Vanadium, V (%): ≤ 0.03
Aluminum, Al (%): ≤ 0.03
TYPICAL MECHANICAL PROPERTIES UNDER ROOM TEMP.
Class 1
Tensile strength, TS, σb/≥ MPa: 825 ~ 1035
Yield strength, YS, σ0.2/≥ MPa: 585
Elongation, EL, δ ≥(％): 15.0
Yield strength, YS, σ0.2/≥ MPa: 585
Elongation, EL, δ ≥(％): 15.0
Reduction of area, RA, (%): 45.0
Annealed hardness, HB ≤: -
Heat treatment pratice: Quenched 925 ~ 980 ℃, 1st tempered 525℃
Class 2
Tensile strength, TS, σb/≥ MPa: 725 ~ 860
Yield strength, YS, σ0.2/≥ MPa: 655
Elongation, EL, δ ≥(％): 16.0
Yield strength, YS, σ0.2/≥ MPa: 655
Elongation, EL, δ ≥(％): 16.0
Reduction of area, RA, (%): 42.0
Annealed hardness, HB ≤: -
Heat treatment pratice: Quenched 925 ~ 980 ℃, tempered 510℃
PRODUCT DESCRIPTION
The alloy is usually produced by IFF + AOD + VD, AOD + EF / EAF + VD, 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 - Quenched and tempered thermal treatment or based on the buyer's special requirements.
The alloy is usually produced by IFF + AOD + VD, AOD + EF / EAF + VD, 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 - Quenched and tempered thermal treatment or based on the buyer's special requirements.
PRODUCT PROFILE AND DIMENSIONS
Round bar (Diameter): 5.50mm to 600mm
Square bar / Flat bar: Thickness 3 to 500 x Width 3 ~ 800mm
Round bar (Diameter): 5.50mm to 600mm
Square bar / Flat bar: Thickness 3 to 500 x Width 3 ~ 800mm
Wire rod (Diameter): 0.50mm to 12mm
Strip: Thickness 0.20 ~ 3.0 x width 8.0 ~ 650mm
Length: Fixed length or random length or based on the customer's special requirement.
Length: Fixed length or random length or based on the customer's special requirement.
Other different shapes based on OEM.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry, please EMAIL (sales@ccsteels.com) our qualified production engineers.
If you meet further on any technical enquiry, please EMAIL (sales@ccsteels.com) our qualified production engineers.
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