23-8N / Nitronic 20
2016-08-26 11:35:50 Origin： Remark： Click：
Material technical specifications SAE and UNS system valve steel 23-8N/Nitronic 20 datasheet,23-8N Chemical compositions, 23-8N/Nitronic 20 Mechanical properties from Steelmaking, 23-8N/ Nitronic 20 ESR melted, Blooming, Forging, Hot rolling, Heat treatment, Straightening, Ultrasonic test, Cold working or Machined. All of these materials conform to Military standard, nuclear power. We also possess the advanced precision machining equipments for further processing.
MATERIAL TECHNICAL DATA SHEET - EV15 / S63018 / 23-8N / Nitronic 20
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - BV
MATERIAL CATEGORY: SAE / UNS system exhaust valve Steel
CHEMICAL COMPOSITION (WEIGHT %)
C (％): 0.28 ~ 0.38
Si (％): 0.60 ~ 0.90
Mn (％): 1.50 ~ 3.50
P (％) ≤: 0.035
S (％) ≤: 0.030
Cr (％): 22.0 ~ 24.0
Ni (％): 7.00 ~ 9.00
Mo (％): -
N (%): 0.28 ~ 0.35
MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Condition: Quenched and tempered
Tensile strength, σb/≥ MPa: 850
Yield strength, σ0.2/≥ MPa: 550
Elongation, δ ≥(％): 25.0
Reduction of area, ф ≥ (％): -
Hardness | HB: -
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.
FORMS AND SHAPES
Round bar (Diameter): 0.20mm to 800mm
Square bar / Flat bar: 3mm to 500mm
Heavy/middle plate via hot rolled: T6 - 200mm X W1000- 2500mm X L1000-12000mm
Sheet steel via cold rolled: T0.5 - 6mm X W600- 1000mm X L1000 - 2000mm
Steel strip via cold rolled: T0.1 - 3mm X W5 - 200mm X L (or in coil form)
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /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.
Hot search：23-8N / Nitronic 20
Previous page：EV16/EMS 235