| Type: | Special Steel Bar |
|---|---|
| Standard: | AISI, ASTM, DIN, JIS |
| Special Use: | High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Free Cutting Steel, Mold Steel |
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Ningshing Distributor Plastic Mold Steel 4CrNi4Mo 1.2767
Ningshing Precision Machinery began in 1992. We devote oneself to providing One-Stop Solutions to our customers on Tool Steel, Die Steel, Alloy Steel, Mold Base, Machining Parts, CNC Machine.
DIN 1.2767 Cold Work Tool Steel is used for making the highly stressed coining tools, cutlery dies, hobbing tools, cold shear blades for heavy gauge material, plastic moulds.
Dimensions
Hot Rolled Flat: 10-120 x 50-1000 mm
Delivery Condition
EAF+(ESR) or EAF+LF+VD+(ESR), Hot rolled or Forged, Spheroidizing Annealed, Black surface or Machined surface, UT SEP1921 Class3 D/d
Equivalence
| AISI / SAE | DIN / W.Nr | JIS | GB |
| ---- | 1.2767 | SKT6 | ---- |
Chemical Composition(%)
| Steel Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
| 1.2767 | 0.40-0.50 | 0.10-0.40 | 0.20-0.50 | ≤ 0.030 | ≤ 0.030 | 1.20-1.50 | 0.15-0.35 | 3.80-4.30 |
Characteristics
1. Cold work tool steel with high thoughness and full hardenability, also large dimensions.
2. High impact strength and compressive strength.
3. For oil and air hardening.
4. Good polishability.
Heat Treatment
Annealing
610 to 650°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. 285 HB.
Stress relieving
Approx. 650°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
840 to 870°C.
Oil, salt bath (300 to 400°C), air. Holding time after temperature equalization: 15 to 30 minutes.
Obtainable hardness:
53 - 57 HRC in air.
54 - 58 HRC in oil or salt bath.
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 certain cases we recommend to reduce tempering temperature and increase holding time.
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| Steel Flat | Steel Plate | Die Steel |
| Plastic Mold Steel | Alloy Steel | Pre-machined Flat |
| Die Casting Die | Mold Base | Aluminum Die |
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