1.2738 Tool Steel Plate Can Maintain High Hardness and Red Hardness at High Temperature
China 1.2738 Tool Steel Plate Can Maintain High Hardness and Red Hardness at High Temperature, Find details about China Steel Plate Can Maintain High Hardness, Steel Plate from 1.2738 Tool Steel Plate Can Maintain High Hardness and Red Hardness at High Temperature
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
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.
- - Large molds with high output requirements such as automobile bumpers, interior parts, refrigerators, and air conditioners.
(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 | 0.10 | 0.20 | ≤ | ≤ | 11.00 | 0.70 | 0.70 |
D2 | 1.40 | 0.10 | 0.20 | ≤ | ≤ | 11.00 | 0.70 | 0.50 |
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 | Start Forging | Finish Forging | 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, |
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 | 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 |
-- | 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, |
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
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