1.2738 Tool Steel Plate with High Hardness and High Temperature

• Type: Steel Plate
• Standard: ASTM, AISI, GB, JIS, DIN, BS
• Certification: ISO
• Surface Treatment: Grinded, Peeled, Polished, Rough Turned
• Technique: Hot Rolled, Forged
• Application: Mold & Dies
• Model NO.: 1.2738
• Special Use: Cutting Tools, Measuring Tools, High-strength Steel Plate
• Stock: Stock
• Size Range: Diameter: 20-480mm
• Delivery Condition: Annealed, Qunched and Tempered
• Shape: Round, Square, Flat
• MOQ: 1000kgs
• Sample: Provided
• Payment: Tt/LC
• Deliver Time: 7-9days
• Width: 1500mm
• Transport Package: in Seaworthy Packing
• Specification: 1.2379, AISI D2
• Trademark: Bozhong
• Origin: China
• Production Capacity: 5000tons/Month

Product Description

1.2738 Tool Steel plate can maintain high hardness and red hardness at high temperature

Description

1.2738 Tool Steel plate can maintain high hardness and red hardness at high temperature

1.Grand:
P20,H13,1.2344,SKD11,D2,Cr12Mov,M2,M42,M35,1.2738,1.2311,1.2714,718H,NAK80,1.2379
Tool steel is the steel used to make cutting tools, measuring tools, molds and wear-resistant tools. Tool steel has high hardness and can maintain high hardness and red hardness at high temperature, as well as high wear resistance and appropriate toughness. Tool steel is generally divided into carbon tool steel, alloy tool steel and high-speed tool steel.Tool SteelThe tool can keep its shape and size unchanged under the conditions of considerable pressure and friction.


2.Process parameters
High-speed tool steel is also an alloy tool steel, which contains C, Mn, Si, Cr, V, W, Mo, Co. And it can be used to make high-speed rotary cutting tools, wear-resistant, high temperature resistant, which is Cr, The ratio of V, W and Mo is relatively large. Take W12Cr4V5Co5 as an example, Cr-> 3.75% -5%, V-> 4.5% -5.25%, W-> 11.75% -13%. The ratio of Cr and V should not be low Less than 3%. The content of P and S shall not exceed 0.030%.

The processing method of alloy tool steel is mainly pressure processing steel and cutting tool steel. There are many types of alloy tool steel, including cold work, hot work, non-magnetic, plastic mold steel, etc. At the same time, the ratio of Cr and V must not be too low. Selection of tool steel for cold work die

The choice of tool steel for cold work molds is based on the main failure mechanism of the mold in practical use. It is not enough to choose tool steel to have only knowledge of steel properties. It must also consider factors such as the number of parts produced, the type of material being processed, thickness, and hardness. A basic method of selecting tool steel is to first eliminate all the failure mechanisms except for wear, and then select the tool steel with the most suitable wear resistance to meet the production requirements.

3)1.2738 mold steel is a mold steel material produced according to the German DIN standard. It has relatively superior mechanical properties and good machinability among steels of similar brands. It is mainly used for the production of hot work molds, of which the application of plastic molds is the most common . In addition, the special pre-hardening treatment of the steel makes it have a good hardness when it leaves the factory, which can reduce the heat treatment link in the processing and production of normal molds and improve economic efficiency.
11.2738 mold steel is pre-hardened plastic mold steel

1.2738 Steel adopts advanced die steel refining technology, which is vacuum-melted Cr-Ni-Mo alloy steel. The steel has excellent polishability and photo-etching performance; excellent workability; good wear resistance; large molds have uniform hardness and dense structure; no risk of quenching cracks and heat treatment deformation, no heat treatment, and shorten the mold production cycle; good Surface nitriding performance; surface flame hardening can be carried out to improve the hardness and wear resistance of the mold surface. Before quenching, the mold must be fully softened and annealed. After quenching, it should be tempered in time and slowly heated.

The fine electrical discharge machining at the post-electrical machining stage should be performed with a small current and a high frequency to avoid damage to the mold. After the discharge, the surface of the mold should be ground to remove the "electric spark white layer", and then tempered again at 500 ºC to remove the stress.


When grinding the tempered mold, in order to prevent grinding cracks and surface softening, attention should be paid to: sufficient cooling; appropriate grinding pressure; reasonable processing technology.

The steel pre-hardened steel has good polishing performance, usually using alumina or gypsum polishing. The first is rough polishing, and then polishing with finer and finer abrasives. The polishing direction should be changed every time the abrasive is changed. The final polishing time should not be too long, otherwise it will affect the roughness of the mold surface.

Nitriding can increase the hardness of the mold surface, improve wear resistance and corrosion resistance. Although the steel has been pre-hardened, the hardness can still be increased by heat treatment
4).chemical composition
C: 0.35-0.46

Si: 0.2-0.4

Mn: 1.3-1.6

P: <= 0.035

S: <= 0.005

Cr: 1.8-2.2

Mo: 0.15-0.25

Ni: 0.9-1.2
5)Main performance
1. Material hardness is uniform

2. Excellent polishing performance

3. Good machining performance

4. Pre-hardened plastic mold steel

5. Nitrogen can be applied

 

1.-Skin pattern, pear pattern, stone pattern etching mold.

2.-Transparent plastics such as stationery boxes and daily necessities containers require high gloss molds.

3.- Especially suitable for hard plastic (PS) and non-shattering plastic (ABS) parts.
 

1. - Large molds with high output requirements such as automobile bumpers, interior parts, refrigerators, and air conditioners.

6)Physical properties
(Sample hardness 340HBW, at room temperature and high temperature)

1) Temperature 20 ° C / 200 ° C / 400 ° C, density 7. 8g / cm / 7.75g / cm / 7. 7g / cm.

2) Temperature 20 ~ 200 ° C / 20 ~ 400 ° C, linear expansion coefficient: 12.6 × 10K / 13.5 × 10K.

3) Temperature 20 ° C / 200 ° C / 400 ° C, thermal conductivity 29.0W · (m · K) /29.5W· (m · K) /31.0W· (m · K)

4) Temperature 20 ° C / 200 ° C / 400 ° C, elastic modulus: 205000MPa / 200000MPa / 185000MPa



 
Chemical Composition (%)

Steel Grade	C	Si	Mn	P	S	Cr	Mo	V
1.2379	1.45 1.60	0.10 0.60	0.20 0.60	≤ 0.030	≤ 0.030	11.00 13.00	0.70 1.00	0.70 1.00
D2	1.40 1.60	0.10 0.60	0.20 0.60	≤ 0.030	≤ 0.030	11.00 13.00	0.70 1.20	0.50 1.10

 
Dimension

Shape	Thick / Dia. (mm)	Width (mm)
Round	8-600	/
Flat	6-200	20-900
Block	150-500	200-1000

 
Delivery Condition
EAF+(ESR) or EAF+LF+VD+(ESR), Hot rolled or Forged, Annealed, Hardness≤255HB,
Unmachined or Machined surface (Peeled, Turned, Milled, Grinded), UT 100% Passed
 
Characteristics
1. With good hardenability and wear resistance.
2. With high oxidation resistance, good corrosion resistance after quenching and polishing, small deformation after heat treatment.
 
Applications
For making different kinds of cold work molds with high accuracy and long service life, cutting tools and measuring instruments, such as complex-shaped piercing dies, threading screw plates, cold extrusion dies, cold cutting scissors, precision measuring tools etc.
 
Forging Technique

Heat Temperature	Start Forging Temperature	Finish Forging Temperature	Cooling Method
1120-1160 °C	1050-1090 °C	≥850 °C	Thermal Annealing

 
Heat Treatment
Annealing
800 to 850°C
Slow controlled cooling in furnace at a rate of 10 to 20°C/hr down to approx. 600°C, further cooling in air.
Hardness after annealing: max. 255 HB.
 
Stress relieving
650 to 700°C
Slow cooling in furnace; intended to relieve stresses set up by extensive machining, or incomplex shapes. After through heating, hold in neutral atmosphere for 1 to 2 hours.
 
Hardening
1020 to 1040°C
Complex shapes/air, simple shapes/air blast, oil, salt bath from (220 to 250°C or 500 to 550°C). Holding time after temperature equalization: 15 to 30 minutes.
Obtainable hardness: 63 - 65 HRC.
 
Tempering
Slow heating to tempering temperature immediately after hardening/time in furnace 
1hour for each 20 mm of work piece thickness, but at least 2 hours/cooling in air.
For average hardness figures to be obtained, please refer to the tempering chart.
For certain cases we recommend to reduce tempering temperature and increase holding 
time. For certain applications requiring improved retention of hardness, a nitriding treatment is recommended.
 

What we can offer
What we can offer?
 
We offer a wide range of steel products in a wide variety of dimensions and executions, acc.to the common international specifications or customerized.
Machining and heat treatment are available.
Also, we advise you in choosing the right materials.
 
Shape Available
Solid round bar
Flat bar
Square bar
Hexagon bar
Block
Plate
Sheet
Wire rod
Strip

 

	AISI	DIN	JIS	Stock	Application
Hot Work Tool Steel	H11	1.2343	SKD6	√	Die Casting Dies,Extrusion Dies, Hammer Dies, Ram Dies, Forging Dies etc.
	H13	1.2344	SKD61	√
	H10	1.2365	SKD7
	--	1.2367	--
	L6	1.2714 / 1.2713	SKT4	√
	H12	1.2606	SKD62
	H21	1.2581	SKD5	√
Cold Work Tool Steel	D3	1.2080	SKD1	√	Cutting Tools, Punching Tools, Shear Bladers, Reamers, Thread Rolling Dies, Calipers, Sockets etc.
	--	1.2601	~SKD11	√
	D2	1.2379	~SKD11	√
	--	1.2379 MOD	DC53 (Daido)	√
	D6	1.2436	--
	O1	1.2510	SKS3	√
	O2	1.2842	--
	A2	1.2363	SKD12
	S1	1.2550	--
	S7	1.2357	--
	--	1.2767	SKT6
	L2	1.2210	--
Plastic Mould Steel	P20	1.2311	--	√	Mold Base,           Core & Cavity,         Bumper Mold             etc.
	P20+Ni	1.2738	--	√
	P20+S	1.2312	--	√
	--	1.2316	--
	420	1.2083	SUS420J2	√
	--	--	NAK80 (Daido)	√
Alloy Steel	4120	25CrMo4 / 1.7218	SCM420		Shafts, Gears, Drillers, Chains, Bolts, Nuts, Pins, Suds, Keys, Bites, Crankshafts, Connecting Rods, Came, Couplings  etc.
	4135	34CrMo4 / 1.7220	SCM435
	4130	34CrMo4 / 1.7220	SCM430	√
	4140	42CrMo4 /        42CrMoS4 /                1.7225	SCM440	√
	4142	41CrMo4 / 1.7223	SCM440
	4145H	--	--
	4330V	--	--
	4340	34CrNiMo6 / 1.6582	SNCM439
	5115	16MnCr5 / 16MnCrS5 / 1.7131
	5120	20MnCr5 / 20MnCrS5 / 1.7147	SMnC420H
	5140	41Cr4 / 41CrS4 / 1.7035	SCr440	√
	8620	21NiCrMo2 / 1.6523	SNCM220
	8640	40NiCrMo2-2 / 1.6546	SNCM240
	--	18CrNiMo7-6 / 17CrNiMo6 / 1.6587	--
	9840	36CrNiMo4 / 1.6511	--
	E71400	41CrAlMo7-10 / 1.8509	SACM1
	--	34CrAlNi7 / 1.8550	--
Bearing Steel	E52100	100Cr6 / 1.3505	SUJ2	√	Bearing, Shafts etc.
	--	100CrMn6 / 1.3520	--
	--	100CrMo7-3 / 1.3536	--
Spring Steel	5155	55Cr3 / 1.7176	SUP9		Springs
	6150	51CrV4 / 1.8159	SUP10
	9261	60CrSi7 / 1.7108	--
Carbon Steel	1010	CK10 / C10E / 1.1121	S10C		Shafts, Chains, Bolts, Nuts, Pins, Suds, Keys, Bites, Came, Couplings  etc.
	1020	C22 / 1.0402	S20C	√
	1040	CK40 / C40E / 1.1186	S40C	√
	1045	CK45 / C45E / 1.1191	S45C	√
	1050	CK50 / C50E / 1.1206	S50C	√
	1055	CK55 / C55E / 1.1203	S55C
	1064	CK60 / C60E / 1.1221	S58C
High Speed Tool Steel	M2	1.3343	SKH51	√	Reamer,       End-mill,          Hob, Cutter, Bite, Drill, Punch, Tap, Brooch etc.
	M7	1.3348	--
	M42	1.3247	SKH59	√
	M35	1.3243	SKH55	√
	T1	1.3355	SKH2
	T15	1.3202	--
	T42	1.3207	SKH57

 
7)Note:
1). √ means we have stoc
2). Delivery Condition:
Smelting: EAF+LF+VD (+ESR)
Making: Hot rolled, Cold rolled, Forged, Cold Drawn
Heat Treatment: Untreated, Annealing, N+T, Q+T
Surface: Black, Peeled, Turned, Milled, Grinded, Polished
 
8)Packing & Shipping
Hot keywords:High quality tool steel, High quality 1.2379/D2 steel, Tool steel manufacturer, Special steel supplier

9)Contact us
Shanghai Bozhong Metal Group Co.,Ltd
Alloy Steel: Plate/Bar/Pipe/Profile/Wear resistant steel/Die Steel
Nickel Alloy: Hastelloy/Incoloy/Inconel/Monel/Stainless Steel
Aluminum Alloy: Plate/Bar/Pipe/Coil
Website:  shanghaibozhong.en.made-in-china.com