Cold rolled stainless steel strips in coils W.-Nr. 1.4021 ( DIN X20Cr13 )
W.-Nr. 1.4021 ( DIN X20Cr13 ) stainless steel is a martensitic stainless steel with 13% 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 ).
Chemical composition ( in weight % )
Dental and surgical instruments, cutlery, pump shafts, plastic molds and dies, steel balls, and various hand tools.
Similar to machining some of the high carbon tool steel, this alloy has tough, stringy chip build-up.
Not commonly welded due to its air hardening characteristics.
Welding may be performed after preheating to 300-400°F (149-204°c) with post weld tempering at temperature for 2 hours.
Filler metal should be AWS E/ER 420.
Bring temperatures slowly up to 1400°F (760°c), then on to 2000-2200°F (1097-1204°c),
after working, furnace cool slowly to avoid cracking.
Reheat often to keep the working temperature above 1600°F.
420 will withstand only minor cold work. Radical forming operations will result in cracking.
1550-1650°F (843-900°c), slow furnace cooling.
300-400°F (149-204°c), air cool for maximum hardness and corrosion resistance.
Soak at 1850-1950°F (1010-1066°c) at quench in heated oil.
Density (lb / cu. in.) 0.278
Specific Gravity 7.7
Specific Heat (Btu/lb/Deg °F - [32-212 Deg °F]) 0.11
Electrical Resistivity (microhm-cm (at 68 Deg °F)) 330
Melting Point (Deg °F) 2650
Modulus of Elasticity Tension 29
YOUR CONTACTLIUsales at ahoneststeel dot comskype; liusales1whatsapp: 0086 18915272882