Original
By certification 
Product Name | Piercing Mill Mandrel |
Brand | Hengdisheng |
Raw Materials | 20XH4ФA acc. to GOST 4543-71 |
Dimension size range | Φ105-Φ500( mainly used for large piercer plug) |
Hardness | 260-320HB |
Surface Processing | oxidization Annealing |
Application | Pipe Pierce mill |
Threading | available |
Steel pipes grade | Very high level structural steel |
Chemical composition | C:0.17-0.23; Mn:0.45-0.65;Si:0.45-0.65;Cr:1.5-1.8;Mo:0.35-0.45; |
Service | OEM, ODM, sampling, testing, CNC machining, packing, design |
Surface Treatment | Nitriding oxidation, oxide layer thickness: 0.3-0.4mm |
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Description
20XH4ФA piercing mill mandrel, raw material is forged steel standard according to Russian standard GOST 4543-71 alloyed construction steel. A of 20XH4ФA represent quality category is high quality.
Group of steel | Grade of steel | Mass fraction of elements, % | |||||
Carbon | Silicon | Manganese | Chromium | Nickel | Vanadium | ||
Chrome - nickel- molybdenum - vanadium and chrome - nickel - vanadium | 20Ð¥Ð4ФA | 0.17-0.24 | 0.17-0.37 | 0.25-0.55 | 0.70-1.10 | 3.75-4.15 | 0.10-0.18 |
20XH4ФA piercing mill mandrel surface treatment is often Nitriding oxidation, or called Oxidation annealing. As thie construction steel must be with special surface finish, to be used in heat treated condition.
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Production Flow
20XH4ФA Production and Quality control process(Contact us for details):
Raw material procuring ---- Chemical composition test --- Smelting -- casting -- demoulding -- heating -- forging -- annealing -- CNC machining -- heat-treatment -- inspection -- packing -- warehousing
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Packaging Logistics
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http://www.hdsnm.com/
