H13 1.2344 SKD61 Hot Forged Super Length Hot Work Tool Steel Round Bar For Tube Punch Mandrel

FOB Price

US $2000.00
1 - 100 metric ton

group nameSteel Forgings
Min Order1 metric ton
brand namefushun
modelH13 / 1.2344 / SKD61
payment methodL/C, D/A, D/P, Western Union, T/T
update timeTue, 26 May 2020 14:26:46 GMT

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Paramtents

Round Diameter Range 80-1000mm
Length 15000mm
Production route EF/EAF+LF+VD/ESR
Delivery status Annealing,Q+T or According to customer's request
Surface Black, grinded, or turned bright
UT test standard SEP1921-84 class3 C/c or D/d
Standard AISI, ASTM, BS, DIN, GB, JIS

Packging & Delivery

Min Order1 metric ton

Briefing

H13 1.2344 SKD61 Hot Forged Long Length Hot Work Tool Steel Round Bar For Tube Roller Mandrel

Detailed

Introduce

H13 steel is the most popular and most versatile, hot work mould steel, providing a good balance of toughness, heat check resistance, and high temperature strength, in addition to moderate wear resistance. H13 steel can resist softening to 550°C and has good resistance to heat checking. Will Nitride with a case hardness over 1000 V.P.N. Generally supplied annealed to HB 230 max.

Process

H13 material is softer during hot forging, in order to avoid excessive bending, the production length of ordinary forging machines is not more than 9 meters, in the case of Radial forging equipment, the H13 steel forging rounds bar can reach a maximum of 15 meters.

In production, H13 ingots need slowly cooled. After ingot release mould, it need take annealed before being forged.

As delivery for clients, H13 recommends annealing + surface bright( remove the black oxide skin), because the high nickel element is prone to surface cracking.

Size & Delivery

Round Diameter Range: 80-1000mm

Length Range:15000mm

Delivery Condition: Annealed

Surface Condition: Bright

Available process: ESR (less non-metallic inclusions), PESR (less non-metallic and hazardous gas element)

Applications

This Super length H13 hot work tool steel forged bar is used for punch mandrel of tube making.

Standard

ASTM A681 Standard Specification for Tool Steel Alloy

Chemical Composition

Steel Grade	C	Si	Mn	P	S	Cr	Mo	V
H13	0.32-0.45	0.90-1.25	0.20-0.60	0.030 max	0.030 max	4.75-5.50	1.10-1.75	0.80-1.25
DIN1.2344	0.35-0.42	0.80-1.20	0.25-0.50	0.030 max	0.030 max	4.80-5.50	1.20-1.50	0.80-1.15
SKD61	0.35-0.42	0.80-1.20	0.25-0.50	0.030 max	0.020 max	4.80-5.50	1.00-1.50	0.80-1.15

Equivalent grades

AS 1239	ASTM A 681	BS 4659	BS EN ISO 4957	JIS G 4404	Werkstoff
H13A	H13/UNS T20813	BH13	X40CrMoV 5-1	SKD 61	1.2344/X40CrMoV5-1

AISI H13 tool steel is characterized by:

High level of toughness and ductility

Good resistance to abrasion at both low and high temperatures

Good high-temperature strength

High through-hardening properties

Very limited distortion during hardening

Good resistance to thermal fatigue

Heat Treatment of Tool Steel H13

FORGING:

Preheat slowly to 750°C then increase the temperature more rapidly to 1050-1100 °C. Do not forge below 850°C. It is essential to cool the H13 slowly after forging, either in a furnace or in vermiculite.

ANNEALING:

Soak thoroughly at 840-860°C before furnace cooling at a maximum rate of 20°C per hour down to 600°C followed by cooling in air.

STRESS RELIEVING:

When tools made from H13 steel are heavily machined or ground, the relief of internal strains is advisable before hardening to minimise the possibility of distortion. Stress relieving should be done after rough machining. To stress relieve, heat the component carefully to 700°C, allow a good soaking period (two hours per 25mm of ruling section). Cool in the furnace or in air. The tools may then be finish machined before hardening.

HARDENING:

Preheat to 780-820°C. Soak thoroughly, then increase rapidly to the final hardening temperature of 1000-1030°C. When the H13 steel has attained this temperature, soak for approximately thrity minutes. Cool in air. Large sections may be quenched in oil. To reduce scaling or decarburisation, we recommend isothermal molten salt bath treatment. Preheat in salt at 780-820°C then transfer to salt bath standing at 1000-1030°C. Soak and quench into salt standing at 500-550°C. Allow to equalise, withdraw and cool in air. Alternatively, this tool steel may be vacuum hardened or pack hardened. Tools should be tempered as soon as they become hand warm.

TEMPERING:

Heat uniformly to the required temperature allowing a soaking time of two hours per 25mm of ruling section. Withdraw from the furnace and allow to cool in air. A second tempering is strongly recommended, the H13 steel being allowed to cool to room temperature between tempers. The usual tempering range is 530-650°C depending on the hardness requirements and the operating temperature of the tool.

Radial Forging Equipment