JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
Jiangsu Mittel Steel Industrial Limited Supply all kinds of Stainless Steel Sheet/Plate/Coil/Round ,Flat ,Angle Bar/Stainless steel Seamless pipe /welded pipe /Elbow/Flange /Galvanized Steel sheet
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We are a professional stainless steel ball manufacture with18years experience history. we are specialised to produce stainless steel ball as below.
Size of AISI304 316 302 202 0.4mm-50.8mm G100-G1000
Size of AISI420 420C 440C 0.4mm-50.8mm G10-G1000
Our factory main products:
1) Stainless Steel Ball ( 201/ 304/ 316/ 420/302/440/410/430/420C/440C)
2) Bearing chrome steel ball
3) carbon steel ball
4) Precision Steel Ball
5) Grinding Media Steel Ball
| CHINA | USA | JAPAN | GERMANY | SWEDEN |
| GB | AISI | JIS | DIN | SIS |
| 9Cr18Mo | 440C | SUS440C | X110CrMo15 | 3230 |
| 1Cr18Ni9 | 302 | SUS302 | X12CrNi188 | 1.43 |
| 0Cr19Ni 9 | 304 | SUS304 | X5CrNi189 | 1.4301 |
| 0Cr17Ni12Mo2 | 316 | SUS316 | X5CrNiMn18 | 10(1.4401) |
| 3Cr13 | 420 | SUS420J2 | X30Cr13 | 1.4028 |
Tolerance Level and Technical Requirements
| Grade | Vdws(≤) | Sph(≤) | Ra(≤) | Vdwl(≤) | Tdn(≤) |
| 10 | 0.25um | 0.25um | 0.025um | 0.5um | * |
| 16 | 0.4um | 0.40um | 0.032um | 0.8um | * |
| 20 | 0.5um | 0.50um | 0.04um | 1um | * |
| 28 | 0.7um | 0.70um | 0.05um | 1.4um | * |
| 40 | 1.0um | 1.00um | 0.08um | 2um | * |
| 60 | 1.5um | 1.50um | 0.10um | 3um | * |
| 100 | 2.5um | 2.50um | 0.125um | 5um | ±12.5um |
| 200 | 5um | 5um | 0.2um | 10um | ±25um |
| 500 | 13um | 13um | * | 25um | ±50um |
| 1000 | 25um | 25um | * | 50um | ±125um |
420 is a martensitic stainless steel with 12% Chromium which is sufficient to give good corrosive resistance properties. .It’s best corrosive resistance is when hardened and surface is ground or polished. It has good ductility in the annealed condition but can be hardened up to 500HB (highest of the chromium grades) due to its excellent harden-ability, it is capable of getting hardened up to 56 HRC Rockwell or higher. Martensitic Grades are known for high hardness and allowances must be made for poor weld ability and usually allowances for a final harden and temper treatment. 420 steel is magnetic and welding is not recommended. Material will not pass the 72 hours salt bath test.
