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Eternal
DC53 die steel forgings are a high-performance cold-work tool steel developed by Daido Steel Co., Ltd. in Japan. They are an improved version of SKD11 steel, with better chemistry and heat treatment.
Jiangyin Eternal Heavy Industry Co., Ltd. uses advanced forging processes and repeated multi-directional upsetting and drawing techniques to produce DC53 steel plates, round bars, and various forgings. Their products have a dense internal structure and evenly distributed carbides. This solves the problems of uneven properties and early failure caused by low forging ratios in traditional die steels.
After standard heat treatment, DC53 forgings can reach a hardness of 62–64 HRC. Their impact toughness is twice that of SKD11 (Cr12MoV). They keep high hardness while also offering excellent resistance to chipping and cracking. That makes them an ideal choice for demanding applications such as precision stamping dies, cold forging dies, and punches.
The chemical composition of our company's DC53 forgings is strictly controlled within the following range, ensuring consistent and stable material performance.
Element | C | Si | Mn | Cr | Mo | V | P | S |
% | 0.90-1.05 | 0.80-1.10 | 0.20-0.50 | 7.50-8.50 | 1.80-2.10 | 0.15-0.35 | ≤0.030 | ≤0.015 |
Component advantages: The higher content of molybdenum (Mo) enhances the hardenability and temper stability of the material; the addition of vanadium (V) refines the grain structure and improves wear resistance; chromium (Cr) ensures sufficient hardenability and corrosion resistance.
Country | Standard | Grade | Note |
Japan | JIS G4404 | DC53（DaTong） | SKD11modified form |
China | GB/T 1299-2014 | Cr8Mo2SiV（or Cr8Mo1VSi） | |
America | ASTM A681 | AISI D2（modified form） | |
Germany | DIN EN ISO 4957 | 1.2377（modified form） | or near 1.2606（X153CrMoV12） |
Europe | EN | 1.2606（X153CrMoV12） | similar |
Korea | KS | STD11（modified form） | |
Austria | 百禄 | K340 | |
Russia | ГОСТ | X12MФ |
Process | Parameter | Hardness |
Annealing | The calcination is carried out at 850 ± 10℃, which is uniform. The temperature is then controlled to cool down at a rate of no more than 30℃/h until it reaches 550℃, after which it is taken out of the furnace and allowed to cool | ≤255HBW |
Quenching | 550℃、850℃ Two preheating processes，1020-1040℃ oil cooling or wind cooling | 61-63HRC |
Low tempering | 180-200℃×2h，tempering twice | 62-63HRC |
High tempering | 520-530℃×2h，tempering 2 to 3 times | 62-64HRC |
Electric arc furnace (EAF) + LF refining + VD vacuum degassing. For high-end requirements, electroslag remelting (ESR) can be adopted to enhance purity.
The initial forging temperature is 1100℃, and the final forging temperature is 900℃.
The annealing process is generally spherical annealing.
Our company has established a complete quality traceability system. Before each batch of DC53 forgings leaves the factory, they undergo strict inspections.
Item | Standard /Method | Requirement |
Chemical composition | Spectral analysis / Wet chemical analysis | Compliant with JIS G4404 and the standards of various countries' brands |
UT | SEP1921 / JIS G4404 | 100% |
Metallographic structure | 500x magnification microscope observation | The carbides are evenly and densely distributed, without segregation or aggregation of large carbide masses. |
Grain size | Microscope examination | Fine grain size ensures dimensional stability |
Hardness | Brinell/Hoekle hardness tester | ≤255HBW（ Spheroidizing annealing） |
Mechanical property | Tensile test / Impact test | Tensile strength and impact toughness meet the standards. |
Macrostructure | Macroscopic corrosion / acid etching inspection | No cracks, pores, inclusions, or other defects |
Nonmetallic inclusion | Microscopic rating | Control within the DS1.5 level |
1. Remove inner defects, make structure denser
Forging breaks the big grains left from casting and welds inner holes and pores. This makes the steel much tighter. Our company uses a forging ratio of 4 or more and three-direction forging, which helps make the material more uniform in all directions.
2. Carbides spread evenly, stop early failure
Repeated upsetting and drawing forging breaks up carbides and spreads them out well. This stops big carbide clusters from forming, which can cause stress points and cracking. The microstructure shows fine, round carbides spread evenly.
3. Good isotropy, longer service life
Good forging greatly reduces differences in material properties in different directions. So the mold works more consistently no matter which way the force comes from. This lowers the risk of chipping and breaking during use.
4. Flexible sizes, custom-made to drawings
We offer DC53 forged plates (thickness 150–400 mm), forged round bars (diameter can be customized), and various special-shaped forgings. We accept orders made to your drawings and cut the material to your needs.
Item | 详情 |
Shape | DC53 Plate、DC53 Round Bar、DC53 Forgings（Customized） |
Standard | JIS G4404 / GB/T 1299 / ASTM A681 / DIN EN ISO 4957 |
Delivery condition | Annealed（≤255HBW）or Quenched and tempered state (as required) |
Surface condition | Black shell forging / Rough machining / Fine machining / Polishing |
Inspection | 100%UT + Comprehensive mechanical property testing + Metallographic examination |
DC53 forgings are hard, tough, and wear-resistant. So they are used in many kinds of work:
Precision stamping molds
for stamping small parts like electronic connector pins
for high-speed blanking molds used on motor cores
Cold working molds
cold forging dies
cold drawing dies
Deep drawing dies
Punches and piercing pins
thin and long punches
punches for blanking thick plates
Forming rolls
work rolls for cold rolling
rolls for straightening
Thread rolling dies
for rolling screw threads
Precision cutting tools
high-hardness cutting tools and blades
Cars and home appliances
stamping molds for car body parts
stamping molds for home appliance parts
Medical devices
cold forging dies for making small, precise parts
Professional forging factory – direct supply from the source
Our company is a professional maker of tool steel forgings. We have large forging presses, fully automatic heat treatment lines, and a well-equipped testing lab. From steelmaking to finished forgings, we provide one-stop delivery – no middle steps.
Full standard coverage – easy for export
Our products meet major international standards like JIS, ASTM, DIN, GB, and EN. We can supply material certificates for each country's grade, so our customers can meet all material approval requirements, both at home and abroad.
Quality is traceable – every batch is tested
Each batch comes with a full test report, including chemical composition, ultrasonic inspection, microstructure, hardness, and mechanical properties. This means quality is fully traceable, and any issues can be tracked back.
Solving the industry's main problems
Problem 1: Mold chipping and breaking → DC53 forgings have twice the toughness of SKD11, greatly improving resistance to chipping and cracking.
Problem 2: Early failure from carbide segregation → Three-direction forging ensures carbides are evenly spread out.
Problem 3: Hard to tell real from fake materials → Full-process test reports and material certificates give 100% genuine product guarantee.
Problem 4: Poor dimensional accuracy → Integrated forging and finishing services give you precise and controlled sizes.
