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H13 Tool Steel is a versatile chromium-molybdenum hot work steel that
is widely used in hot work and cold work tooling applications. The hot
hardness (hot strength) of H13 resists thermal fatigue cracking which
occurs as a result of cyclic heating and cooling cycles in hot work
tooling applications. Because of its excellent combination of high
toughness and resistance to thermal fatigue cracking (also known as
heat checking) H13 is used for more hot work tooling applications than
any other tool steel.
Because of its high toughness and very good stability in heat
treatment, H13 is also used in a variety of cold work tooling
applications. In these applications, H13 provides better hardenability
(through hardening in large section thicknesses) and better wear
resistance than common alloy steels such as 4140.
Hot forging and pressing dies, Extrusion dies, mandrels and punches,
Hot chisels, Pressure pads, Extrusion stems, and rams, Blanking and
bending tools, Hot heading tools, Backer blocks.
||DIN EN ISO 4957
Addition to other grades:
MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B,
EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, OHNS, D2, D3, H-11, CW-1,
M2, M35, M42, 2714, SKD-11, P20, P20+S, P20+Ni, SCM 420, ASTM SA-36,
ASTM SA-105, SAE 1018, SAE 1020, SAE 4140, SAE 8620, 16MNCR5, 20MNCR5,
C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75,
SAE 52100, S40C, S355J2G3.
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The following table shows the chemical composition of H-13 steel:
Tensile strength, ultimate (@20°C/68°F, varies with heat
||1200 – 1590 MPa
||174000 – 231000 psi
Tensile strength, yield (@20°C/68°F, varies with heat treatment)
||1000 – 1380 MPa
||145000 – 200000 psi
|Reduction of area (@20°C/68°F)
|Modulus of elasticity (@20°C/68°F)
Hardness tests were made on 1-in. round specimens of H13 which were
air quenched from 1850°F and tempered for two hours at various
H13 tool steels are preheated to 816°C (1500°F). Then the steels are
directly heated by increasing the temperature to 1010°C (1850°F)
followed by holding for 15 to 40 mins. The steels are then
H13 tool steel is a steel having very high hardenability and should be
hardened by cooling in still air. The use of a salt bath or controlled
atmosphere furnace is desirable to minimize decarburization, and if
not available, pack hardening in spent pitch coke is suggested. The
temperature employed is usually 1800°-1850°F, depending on size
Tempering practice may vary with size and application, but is usually
performed in the range of maximum secondary hardness or higher. Double
tempering is recommended. The results below is H13 that was air
quenched from 1800°F and tempered for 4 hours at various temperatures.
The results may be used as a guide, keeping in mind that parts of
heavy section or mass may be several points lower in hardness.
||7.7 x 1000 kg/m3
||10.4 x 10-6/ºC
H13 tool steels are forged at 1079°C (1975°F). For this type of
steels, forging below 898°C (1650°F) is not preferable.
When desirable to relieve the strains of machining, heat slowly to
1050°-1250°F, allow to equalize, and then cool in still air (Strain
Do Not Normalize.
H13 tool steels are annealed at 871°C (1600°F) and slowly cooled at
4°C (40°F) in the furnace.
The machinability rate of H13 tool steels is nearly 75% of that of the
W group tool steels.
H13 tool steels are readily weldable.
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