420 Stainless Steel - 1.4034 - X46Cr13 - 51420 - ~SUS 420J1
As a stainless steel, 420 is corrosion resistant, has a high wear resistance and with its high carbon content it is a low distortion through hardening steel.
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Imperial and Metric Steel Sizes for Sale
Imperial Steel Size
420 Stainless Steel Standard values
Working hardness:
50 HRC - 55 HRC
Delivery condition:
max. 241HB
Chemical composition in %
0.430000
0.430.500000
0.50.000000
01.000000
10.000000
01.000000
10.000000
00.040000
0.040.000000
00.015000
0.01512.500000
12.514.500000
14.5420 Stainless Steel Technical Data
420 Stainless Steel Technical Properties
Corrosion resistant cold work and plastic mold steel with good machining properties, hardenable and polishable. Low distortion through-hardening steel with full hardenability and high wear resistance, conditionally acid resistant.
420 Stainless Steel Applications
mechanical engineering, medical technology, plastic molds, synthetic resin mold tools, die casting tools, light metal die casting, cutting tools, machine knives, kitchen knives, razors, shears, scraper blades, surgical instruments, measuring tools, roller bearings, ball bearings, ice-skates, pump parts, valves
420 General Information
420 stainless steel has, in its annealed condition, good ductility and can, when hardened, reach a hardness of min. 469 BHN (50 HRC). As a martensitic stainless steel 420 is optimized for its high hardness, while other properties are compromised to some degree. 420 loses ductility at sub-zero temperatures and is in comparison to austenitic steels less corrosion resistant, has poor weldability and loses strength when over-tempered at elevated temperatures.
Applications
Applications for this tool steel include: dental instruments, scissors, gauges, needle valves, ball check valves, pivots and magnets.
Corrosion resistance
420 stainless steel has a good resistance to water and steam, and a moderately resistance to corrosive environments free of chlorides. 420 is not resistant to intergranular corrosion after being welded or in its annealed condition. Where corrosion resistance is an issue, care should be taken not to over temper the material or use it in its annealed condition, but to use it in the hardened condition with a high finished, smooth surface.
Heat resistance
420 should be used at moderately elevated temperatures, it is not recommended to use it for high temperatures above 800°F (427°C) as it reduces the corrosion resistance and mechanical properties.
Annealing
To anneal 420 stainless hold the material at a temperature range of 1382-1562°F (750-850°C) and cool slowly in the furnace or in air.
Stress relieving
Heat the work piece to a temperature of 300-800°F (149-427°C) and hold for 1-3 hours, then cool in air or quench in oil or water.
Hardening
Heat the steel uniformly to 1922°F (1050°C) and follow this up with a rapid cooling in air or oil.
Tempering
To reach a variety of hardness values and mechanical properties heat the work piece to 300-400°F (149-204°C) and cool in air. For optimal corrosion resistance and mechanical properties, the temperature range of 797-1112°F (425-600C) should be avoided.
For our tempering diagram, please click here.
Hot working
Slowly and uniformly heat to a temperature of 1400°F (760°C) and then further to 2000-2200°F (1093-1204°C). To avoid cracking cool slowly in the furnace. Do not let the temperature drop below 1600°F (871°C) and reheat as necessary.
Cold working
Excessive forming can result in cracking, therefore 420 tolerates only minor cold work.
Quenched 420 may be poorly magnetizable. With increased cold working, the magnetizability increases.
Machinability
420 stainless steel machines similar to some high carbon steels and creates tough stringy chips.
Disclaimer
The data shown here has been compiled with the greatest diligence and is regularly updated with regard to the correctness and completeness of its content. The content is indicative only and should not be taken as a warranty of specific properties of the product described or a warranty of suitability for a particular purpose. All information presented is given in good faith and no liability will be accepted for actions taken by third parties in reliance on this information. ABRAMS Industries reserves the right to change or amend the information given here in full or parts without prior notice.