Din 1.2888 Mold Steel Equivalent
Type:Round bar
Delivery condition: Annealed black surface/Turned bright surface/Q+T
Products Description
1.2888 mold steel corresponding to domestic 20Cr9W6Mo2Co10 material, is a good choice for extrusion magnesium material mold. 1.2888 steel is a new type of high temperature resistant high speed steel produced by using advanced steelmaking technology, which has the characteristics of high strength, high temperature resistance and good wear resistance. 1.2888 mold steel is mainly used in nozzle head, nozzle body, infusion tube and other aspects of aluminum die-casting, magnesium alloy, copper die-casting mold.
1.2888 Steel Heat Treatment
Quenching temperature: 1100-1150 °
Tempering temperature: 600-750 °
Temperature tempering hardening value/MPa
500°-55
600° -54
650 ° - 53 (surface hardness after surface hardening)
1.2888 Steel Characteristics:
It is a kind of air quenched and hardened hot work die steel ,similar to the United States H13 die steel. Its performance and use are basically the same as that of 4Cr5MoSiV steel, but because of its higher vanadium content, its medium temperature (600 ℃) performance is better than that of 4Cr5MoSiV steel, which is a representative steel grade widely used in hot work die steel.
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Products parameters
|
DIN |
GB |
|
1.2888 |
20Cr9W6Mo2Co10 |
1.2888 Chemical Composition
|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
W |
Co |
| 0.17-0.23 | 0.15-0.35 | 0.40-0.60 |
≤0.030 |
≤0.035 |
9.00-10.00 | 1.80-2.20 | 5.00-6.00 | 9.00-10.50 |
1.2358 Steel Properties
|
Size range : |
Diameter (mm) |
Thickness (mm) |
Width (mm) |
|
8 - 450 |
6 - 350 |
Max 810 |
|
Delivery condition : |
Soft annealed to max. 240 HB |
Product Picture
Our factory
Steel Making
Ingot Production
Forged Bars
Machinary
Characteristics of 1.2888 steel:
The range of thermal expansion coefficient of 1.2888 steel is (10-20) × 10-6/K, the larger the coefficient, the greater the deformation after heating, and the smaller the linear thermal expansion coefficient α L definition: when the temperature rises by 1 ℃, the relative elongation coefficient of thermal expansion of the object is not constant, but slightly changes with the temperature and increases with the temperature.
Test and inspection: 100% mixed test
100% crack test, defect depth max.1% of diameter(turned, peeled) or width
100% US test acc. to SEP standard. Ultrasonic test according to SEP 1921-84 G3 C/c;SEP 1921-84 D/d(optional)
Packing & Delivery
Packing & Delivery
-
The inner size of container is below:
-- 20ft GP: 5.8m(length) x 2.13m(width) x 2.18m(high)
-- 40ft GP: 11.8m(length) x 2.13m(width) x 2.18m(high)
-- 40ft HG: 11.8m(length) x 2.13m(width) x 2.72m(high)
Our Service
1. Competitive price and quality from our own factory .
2. Best service with 24 hour`s reply .
3. Flexible payment with T/T,L/C , etc .
4. Smooth production ability(1000tons/month).
5. Quick delivery and standard exporting package.
Relevant Steel Specifications of AISI T4 High Speed Tool Steels
| Country | USA | German | Japan |
| Standard | ASTM A600 | DIN EN ISO 4957 | JIS G4403 |
| Grades | T4/T12004 | S 18-1-2-5/1.3255 | SKH3 |
AISI T4 Tool Steel and Equivalents’ Chemical Composition
| ASTM A600 | C | Mn | P | S | Si | Cr | V | W | Mo | Co | ||||||||
| T4 | 0.70 | 0.80 | 0.10 | 0.40 | 0.03 | 0.03 | 0.20 | 0.40 | 3.75 | 4.50 | 0.80 | 1.20 | 17.50 | 19.00 | 0.40 | 1.00 | 4.25 | 5.75 |
| DIN ISO 4957 | C | Mn | P | S | Si | Cr | V | W | Mo | Co | ||||||||
| S 18-1-2-5/1.3255 | 0.75 | 0.83 | … | 0.40 | 0.03 | 0.03 | … | 0.45 | 3.80 | 4.50 | 0.80 | 1.20 | 17.50 | 18.50 | 0.50 | 0.80 | 4.50 | 5.50 |
| JIS G4403 | C | Mn | P | S | Si | Cr | V | W | Mo | Co | ||||||||
| SKH3 | 0.73 | 0.83 | … | 0.40 | 0.03 | 0.03 | … | 0.45 | 3.80 | 4.50 | 0.80 | 1.20 | 17.00 | 19.00 | … | … | 4.50 | 5.50 |
Mechanical Properties of T-4 Steel
| Properties | Metric | Imperial |
| Modulus of elasticity | 190-210 GPa | 27557-30458 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
Thermal Properties of T4 Tool Steels
| Properties | Metric | Imperial |
| Thermal expansion co-efficient | 11.9 µm/m°C | 6.6 µin/in°F |
Forging of ASTM T4 Tool Steel Materials
Forging of T4 steel can be carried out from 850 to 1120°C (1775 to 2100°F).
Preheat T4 steel material uniformly and slowly to 860-880°C.
Increase the forging temperature up to 1050-1120°C.
T4 hss tool steel should be cooled very slowly after forging.
AISI/ASTM T4 Tool Steel Heat Treatment and Properties
Hardening:
Harden T4 high speed tool steel from a temperature of 1260-1290oC followed by oil, air quenching or warm bath at 550oC. Hardness after quenching is 63-66 HRC.
Annealing:
T4 steel should be annealed after hot working. Increase the temperature of T4 high speed steel to 860°C(Max220°C per hour). Hold at the temperature and then cool slowly with the furnace. The annealed hardness achieved should be below HB255.
Tempering:
Tempering temperature: 2x 560-580oC. Hardness after tempering is 64-65 HRC.
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کا ایک جوڑا
DIN 1.2419 کولڈ ورک ٹول اسٹیل بارشاید آپ یہ بھی پسند کریں
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