241HB hardness alloy steel good strength 241HB hardness alloy steel

Introduction of 4140
4140 steel has high strength, hardenability, good toughness, small
deformation during quenching, and high creep strength and durable strength at
high temperature. It is used to manufacture forgings requiring higher strength
and larger quenched cross section than 35CrMo steel, such as large locomotive
traction gear, supercharger transmission gear, rear axle, highly loaded
connecting rod and spring clip, and can also be used for oil drilling.

Heat treatment:
1. Normalizing: Heat the furnace to 900°C~930°C, keep the thickest cross
section per inch at this temperature for one hour, and cool in air.
2. Heat to austenitizing at a temperature of 860℃~885℃, and keep the thickest
cross section per inch for one hour at this temperature
3. Normalizing or oil quenching, and cooling to a maximum temperature of 121°C
4. Temper at a temperature that achieves the following mechanical properties.
The thickest cross-section per inch is held for one hour at the tempering
temperature, and the tempering temperature range is 640 ° C ~ 680 ° C
5. For each heat treatment process, a heat treatment chart must be drawn.
6. The mechanical property test shall be carried out in accordance with the
stipulations of ASTM. A-370. The sample material used for the test shall be cut
from the test bar of the same furnace steel. The casting or forging represented
by the sample and the test bar shall be in the same furnace. The test bar shall
be heat treated in the same furnace together with the charge.
7. The mechanical properties should meet the following requirements: (Tested
with a test bar, sampling according to APT 6A, 110K standard) - Tensile
strength minimum lb/inch (862) Yield strength minimum lb/inch 110.000 (758) 2
inches The minimum value of elongation is 15% and the minimum value of section
shrinkage rate is %40. Brinell hardness HB285 ~ take, the casting or forging
represented by the sample and the test bar must be in the same furnace, and the
test bar should be heat treated in the same furnace together with the charge.
8. The mechanical properties should meet the following requirements: (tested
with test bars, sampling according to APT 6A, 110K standard) - minimum tensile
strength lbs/inch (862) minimum yield strength lbs/inch (758) 2 inches Minimum
elongation %15 Minimum shrinkage of section %40 Brinell hardness HB285～352
9. Marking: Each part shall be printed with heat treatment marks and hardness
with low stress steel stamp.

Company strength
  Dongguan Songshun Mould Steel Co., Ltd. is an Indusrtial and trading
company with 2 warehouses that manufactures good & high quality kinds of steels
starting from 2012. The company provides the customized products and OEM
service. What´s more, we keep the mass stock of over 20000 tons. In those
years, we offer a wide range of steels to our customers from all over the
world. And we enjoy high praise among them.

Don't hesitate, here is your best choice! contact us,Latest business news for
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songshunmoldsteel41404340

Minimum Order: 4 tons

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