Special Structure Tool Steel 1.6523 / SAE8620 Forged Steel Block
20CrNiMo AISI, former U.S. Department of steel in SAE 8620 steel.
Hardenability is similar to that of 20CrNi steel. Although the Ni
content in the steel is half 20CrNi steel, but due to the addition
of a small amount of Mo element, the upper part of Austenite
Isothermal Transformation Curve to the right; and because the
appropriate increase of Mn content in the steel hardenability is
still good, high strength than 20CrNi steel.
1) Demand has high yield strength, tensile strength and fatigue
strength, there has enough plasticity and toughness;
2) Demanding by refining outside the furnace, vacuum electroslag
remelting or processing, or double vacuum smelting, vacuum
induction furnace smelting suitable heat treatment;
3) Corrosion resistant steel, heat-resistant steel, wear-resistant
steel, magnetic steel, and other special physical and chemical
properties of the steel.
Recommend heat treatment:
|Heating temperature/℃||Cooling way||Hardness (HRC)||Tempering temperature/ºC||Tempering number||Hardness|
|850||Oil Cooling or Air Cooling||60-63||200||1||≥59|
1, Often used in the manufacture of gears in engines and
transmission systems of small and medium automobiles and tractors
2, It can substitute for the 12CrNi3 steel to produce the
carburized parts and cyaniding parts with higher core performance,
such as the claw and cone of the roller bit for oil drilling and
3, Gears used for manufacturing steam turbines, rotors, internal
combustion engines, connecting rods, valve sections, forgings,
Delivered by heat treatment (normalizing, annealing or high
temperature tempering) or non thermal treatment. The delivery
status shall be marked in the contract.
1) EAF:Electric Furnace+LF+VD (Optional);
2) ESR:Electric Furnace+LF+VD+Eleroslag Remelted (Optional).
Packed with plastic film, seaworthing packing, others according to
Why Choose Us?
1, Sizes, materials and others are all at your requirements and can
2, Price varies on materials, dimensions, finish craft and
3, We are direct manufacture in machinery manufacturing work with
experience of several decades;
4, Detail production design will be made according to information
5, We have adequate inventory, so that we can quick delivery;
6, The most important is that we have advanced equipment.