| Customization: | Available |
|---|---|
| Type: | High Carbon Alloy Ledeburite Steel |
| Standard: | AISI, ASTM, DIN, JIS, GB, BS |
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1.2344 H13 Die Casting Steel Flat Round Bar Tool Steel Supplier
Equivalence
| AISI / SAE | DIN / W.Nr | JIS | GB |
| H13 | 1.2344 | SKD61 | 4Cr5MoSiV1 |
Chemical Composition(%)
| Steel Grade | C | Si | Mn | P | S | Cr | Mo | V |
| 1.2344 | 0.35-0.42 | 0.80-1.20 | 0.25-0.50 | ≤ 0.030 | ≤ 0.020 | 4.80-5.50 | 1.20-1.50 | 0.85-1.15 |
| H13 | 0.32-0.45 | 0.80-1.20 | 0.20-0.50 | ≤ 0.030 | ≤ 0.030 | 4.75-5.50 | 1.10-1.75 | 0.80-1.20 |
| SKD61 | 0.32-0.42 | 0.80-1.20 | 0.25-0.50 | ≤ 0.030 | ≤ 0.030 | 4.50-5.50 | 1.00-1.50 | 0.80-1.15 |
| 4Cr5MoSiV1 | 0.32-0.45 | 0.80-1.20 | 0.20-0.50 | ≤ 0.030 | ≤ 0.030 | 4.75-5.50 | 1.10-1.75 | 0.80-1.20 |
Supply Specifications
| Condition | Processing Route |
Tolerance Range |
Surface Quality |
Application Notes |
| Black | / | Rolled: +3~5 mm Forged: +10~20 mm |
Hot-rolled black scale surface | Economical choice for large volume orders |
| Rough Machined |
Milled 4 sides + Rough ground 2 sides
|
Rolled: +0~1 mm Forged: +0~5 mm |
Clean surface no heavy scale |
Pre-machined surface ready for further processing |
| Fully Machined |
6 sides precision milled + ground |
+0.05~0.1 mm | Surface roughness Ra1.6 | Ready for direct CNC machining |
| Ground Finish |
6 sides fine ground | +0.02~0.05 mm |
Mirror finish
|
For high-precision molds |
| Custom cutting service available according to drawings | ||||
Forging Technique
| Heat Temperature | Start Forging Temperature | Finish Forging Temperature | Cooling Method |
| 1120-1150 °C | 1050-1100 °C | 900-850 °C | Pit or Sand Cooling |
Annealing
750 to 800°C (1382 to 1472°F)
Slow controlled cooling in furnace at a rate of 10 to 20°C/hr (50 to 68°F/hr) down to
approx. 600°C (1112°F), further cooling in air.
Hardness after annealing: max. 235 HB.
Hardening
1020 to 1080°C (1868 to 1976°F)
Oil, salt bath (500 - 550°C / 932-1022°F), air
Holding time after temperature equalization: 15 to 30 minutes.
Obtainable hardness:
52 - 56 HRC in oil or salt bath,
50 - 54 HRC in air.
Stress relieving
600 to 650°C (1112 to 1202°F)
Slow cooling in furnace; intended to relieve stresses set up by extensive machining, or in complex shapes.
After through heating, hold in neutral atmosphere for 1 - 2 hours.
Tempering
Slow heating to tempering temperature immediately after hardening / time in furnace
1 hour for each 20 mm of work piece thickness, but at least 2 hours / cooling in air.
It is recommended to temper at least twice.
A third tempering cycle for the purpose of stress relieving may be advantageous.
1st tempering approx. 30°C (86°F) above maximum secondary hardness.
2nd tempering to desired working hardness.
The tempering chart shows average tempered hardness values.
3rd for stress relieving at a temperature 30 - 50°C (86 to 122°F) be low highest
tempering temperature.
Technical Parameters
• Stable supply from leading domestic and overseas tool steel mills
• Complete tool steel grade portfolio
• Competitive pricing advantage
• Large stock and flexible cutting services
• Flexible delivery and supply solutions
• Professional technical support
Q1: What is Ningbo Ningshing Precision Machinery Group Co., Ltd ?
A1: Ningbo Ningshing Precision Machinery Group Co., Ltd., formerly known as Ningbo Ningshing Special-Steel Group Co., Ltd., is the leading distributor of Special Steel, and also a professional mold base maker in China. Our business involves special steel trading, machining processing, mold base making, heat treatment, CNC machines manufacturing.
Q2: Are you a manufacturer or a trader?
A2: For Special Steel, we are the one of the leading distributors and service center in China. 9 warehouses with over 50,000 tons of regular stock. Our workshop has various kinds of equipments for sawing, milling, grinding, drilling etc.
For mold base, we are a professional manufacturer, with 24 sets of CNC machines, 3 axis and 5 axis, CMM for inspection. We produce medium-large sized mold base for plastic injection mold and die casting die.
Q3: How do you control the quality of steels?
A3: Firstly, we have very close and deep relationship with Chinese Prime Mills, choose supplier carefully, and regard them as the long term business partner. Based on the long term cooperation, we concentrate on special steel business and expand the market step by step. Secondly, we have own technical center which is formed by the experienced engineers and technicians whom ever worked for prime mills. We control the quality in production process, in-out warehouse.
Q4:: Which kind of processing can you do?
A4: We do machining processing like cutting, milling, grinding, turning, peeling, drilling, CNC machining. Meanwhile, we do vacuum heat treatment for die and mold.
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