Grade 420 stainless steel is a high-carbon steel with a minimum chromium content of 12%. Like any other stainless steel, grade 420 can also be hardened through heat treatment. It offers good ductility in its annealed state and excellent corrosion resistance properties when the metal is polished, surface grounded or hardened. This grade has the highest hardness - 50HRC - among all the stainless steel grades with 12% chromium. Celsius 420 hollow sections are supplied with a minimum yield strength of 420 N/mm 2 and comply fully with the European Standard for hot finished structural hollow sections, EN10210:S420NH. Yield strength This steel grade finds application in cutlery such as carving knives, table knives and so on. Grade 420 steels have good corrosion resistance against food, but continuous exposure of metals to unwashed food substances can lead to pitting corrosion. Heat Resistance

Edge retention is another area where 420 stainless steel outperforms 3cr13. The higher levels of chromium and carbon in 420 stainless steel give it a longer-lasting edge, making it a better choice for applications where sharpness is important. Cost The following properties are mentioned for bar products in ASTM A276. The specification may not necessarily be similar for other forms, such as forgings and plate. Composition Roland reserves the right to terminate this License Agreement if you fail to comply with any of the terms of this License Agreement. Upon such termination, you shall immediately stop using the SOFTWARE.Available in a wide size range of square (40 x 40 x 3.2mm to 400 x 400 x 16mm) rectangular (50 x 30 x 3.2mm to 500 x 300 x 16mm) hollow sections Grade 420 stainless steels are welded using welding rods, coated with grade 420 metals, to achieve high-strength joints. During the process, steels are pre-heated at 150 to 320°C and post-heated to 610 to 760°C. In the “as welded” condition, parts are welded using grade 309 filler rods to achieve ductile joints. However, grade 309 electrodes or rods are recommended for welding grade 420 steels by AS 1554.6. Machining Celsius 460 hollow sections are supplied with a minimum yield strength of 460 N/mm 2 and comply fully with the European Standard for hot finished structural hollow sections, EN10210:S460NH. Yield strength Each weekly update will get 100 GR Points. I'll do these monthly. Anyone who updates every week will get a further 1000 GR Points at the end of the competition. Celsius S355NH is available in standard lengths from 6.0m to 14.5m for sizes up to 100/100 or 120/80 and up to 15.3m for all other sizes. Circular hollow sections (CHS)

Available in a wide size range of square (40 x 40 x 3.2mm to 400 x 400 x 16mm) rectangular (50 x 30 x 3.2mm to 500 x 300 x 16mm), elliptical (300 x 150 x 8mm to 500 x 250 x 16mm) and circular (42.4 x 3.2mm to 508 x 16mm) hollow sections High strength steel, enabling at least 20% weight saving and reduced carbon footprint, compared to an S460 strength section, when used in strength-limited applications Finally, the cost is another factor to consider when choosing between these two types of stainless steel. 420 stainless steel is more expensive than 3cr13 due to its superior properties. Conclusion Stainless steel grades that are similar to grade 420 stainless steels include martensitic steels such as the other versions of grade 420, having vanadium, sulphur and molybdenum in their composition, and the grade 440 series. Non-standard grade 420C has carbon content that is little higher than that of grade 420.

Celsius® 355 hollow sections are supplied with a minimum yield strength of 355 N/mm 2 and comply fully with the European Standard for hot finished structural hollow sections, EN10210:S355NH. Yield strength;R eHmin N/mm 2; High strength hot finished hollow sections suitable for all construction and mechanical applications. Celsius® 355 is suitable for all internal and external applications to BS5950-1:2000, EN1993 and BS5400. Normalized fine grain steel, so free of internal stresses and with a minimum strength of 460N/mm 2 allowing the highest fabrication factors and enabling material cost savings and lighter structures

Fully compliant with CE marking and certified as suitable for all structural applications; overcomes design risks associated with other forms of hollow sections Mechanical Test: Y.S = 1172.334 N/mm2, UTS = 1114.494 N/mm2, El = 1.04 % only. Doesn’t match to manufacturer test report found very hard materials and Elongation is very low (please find attachment the mechanical test report from our end user). Both 420 stainless steel and 3cr13 are highly corrosion-resistant. However, 420 stainless steel can better resist corrosion in high-chloride environments like salt water. Edge Retention Annealing – Grade 420 stainless steels can be heated at temperatures from 840 to 900°C, followed by slow furnace cooling at 600°C and then air-cooling.Hardening – This process involves heating grade 420 steels at 980 to 1035°C, followed by air or oil quenching. Oil quenching is usually preferred for heavy metal sections. Tempering is performed at 150 to 370°C to achieve high hardness and good mechanical properties. Grade 420 should not be tempered between 425 and 600°C. Welding Tight corner radii (<2T) exceeding the standard - enhancing the product’s aesthetic appeal whilst avoiding the risk of brittle fracture which occurs in some cold formed products In no event shall Roland Corporation be liable to end-users for any damages whatsoever, including but not limited to financial damages for any loss of profits or information arising from the use of, or inability to use this updater. The foregoing provision is effective even if Roland Corporation has been advised of the possibility of such damages.

d) You may not use the Software from multiple locations of a multi-user or networked system at any time.c) If there are any differences between the terms of this License Agreement and the OSS License, the OSS License shall prevail and the terms of this License Agreement shall not apply.