443S65
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Material Specification BS 970 Part 4 of Valve Steel 443S65 Round bar, Wire rod 443S65 Plate instock - ESR steelmaking, Heat treatment, Cold worked.
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - BV
TECHNICAL SPECIFICATION DATASHEET - BS 443S65
MATERIAL CATEGORY: Valve steel
MATERIAL SPECIFICATIONS: BS 970 Part 4 (1996)
CHEMICAL COMPOSITION (mass weight - %)
Carbpm. C (％): 0.75 ~ 0.85
Silicon, Si (％): 1.75 ~ 2.25
Manganese, Mn (％): 0.30 ~ 0.75
Phosphorus, P (％)≤: 0.040
Sulfur, S (％)≤: 0.030
Chromium, Cr (％): 19.00 ~ 21.00
Nickel, Ni (％): 1.20 ~ 1.70
Molybdenum, Mo (％): -
Silicon, Si (％): 1.75 ~ 2.25
Manganese, Mn (％): 0.30 ~ 0.75
Phosphorus, P (％)≤: 0.040
Sulfur, S (％)≤: 0.030
Chromium, Cr (％): 19.00 ~ 21.00
Nickel, Ni (％): 1.20 ~ 1.70
Molybdenum, Mo (％): -
HEAT TREATMENT - VALVE STEEL
Solution treatment or quenched |temperature /℃: 1030～1080
Solution treatment or quenched|cooling medium : oil cooled
Ageing treatment or tempered |temperature /℃ : 700~750
Ageing treatment or tempered |soaking time /h : -
Solution treatment or quenched|cooling medium : oil cooled
Ageing treatment or tempered |temperature /℃ : 700~750
Ageing treatment or tempered |soaking time /h : -
MELTING PROCESS
This alloy is generally smelt in electric arc furnace (EAF ) or IFF + VD, LF + Electroslag remelting (ESR). For a purpose of higher quality, it should be smelt via technology of vacuum refining and external refining.
This alloy is generally smelt in electric arc furnace (EAF ) or IFF + VD, LF + Electroslag remelting (ESR). For a purpose of higher quality, it should be smelt via technology of vacuum refining and external refining.
FEATURES AND CLASSIFICATIONS
Valve steel is a subbranch of heat resistant steels, which is a special material for processing the vent valve & intake valve of combustion engines. This steel material is always under the high temperature 450 ~ 900℃ and also in the operating conditions of 3000~7000kPa explosion pressure. It longly stands up to the gas-fired high temperature corrosion, scouring of gasoline, diesel and also friction from valve seats. Hence, the valve steel material must have enough heat resistance, high temperature resistance corrosivity, inoxidizability, abrasive resistance and impact resistance under the highest working temperature.
Valve steel (gas valve steel) is suit for fabricating different types of valves. To improve the abrasive resistance and corrosion resistance, surface modified process can be used, such as surface alumetizing, bead welding hard alloy. Based on the pattern of organization, Valve steel is divided into martensitic type and austenitic type. The presentative martensitic valve steel is BS 381S34, BS 349S52 and austenitic valve steel BS 401S45, BS 443S65.
Valve steel is a subbranch of heat resistant steels, which is a special material for processing the vent valve & intake valve of combustion engines. This steel material is always under the high temperature 450 ~ 900℃ and also in the operating conditions of 3000~7000kPa explosion pressure. It longly stands up to the gas-fired high temperature corrosion, scouring of gasoline, diesel and also friction from valve seats. Hence, the valve steel material must have enough heat resistance, high temperature resistance corrosivity, inoxidizability, abrasive resistance and impact resistance under the highest working temperature.
Valve steel (gas valve steel) is suit for fabricating different types of valves. To improve the abrasive resistance and corrosion resistance, surface modified process can be used, such as surface alumetizing, bead welding hard alloy. Based on the pattern of organization, Valve steel is divided into martensitic type and austenitic type. The presentative martensitic valve steel is BS 381S34, BS 349S52 and austenitic valve steel BS 401S45, BS 443S65.
PROFILE & DIMENSIONS
Round bar / Wire rod (diameter1): 5.5mm to 450mm
Square bar / Flat bar: 10mm to 800mm
Length: Fixed length or random length or based on the customer's special requirement.
Round bar / Wire rod (diameter1): 5.5mm to 450mm
Square bar / Flat bar: 10mm to 800mm
Length: Fixed length or random length or based on the customer's special requirement.
Heavy / middle plate via hot rolled: T60 - 400mm X W70 - 1000mm X L1000-12000mm
Sheet steel via cold rolled: T0.5 - 4mm X W100 - 1000mm X L1000 - 2000mm
Steel strip via cold rolled: T0.1 - 3mm X W5 - 200mm X L (or in coil form)
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineers, Email: sales@ccsteels.com.
Sheet steel via cold rolled: T0.5 - 4mm X W100 - 1000mm X L1000 - 2000mm
Steel strip via cold rolled: T0.1 - 3mm X W5 - 200mm X L (or in coil form)
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineers, Email: sales@ccsteels.com.
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