Features of Plastic Mold Steel

• 1 P-type or ‘plastic mold steel’ are classified with the prefix ‘P’ and are designed to be suitable for plastic injection molding dies and zinc die casting.
   
  Our plastic mold steels are highly corrosion-resistant and used to process plastic molds, which can contain chemically aggressive or abrasive fillers.
  (1). P20 Tool Steel
  ASTM P20 Steel is a good quality plastic tool steel, P20 steel belong to the high-quality medium carbon, Pre-hardness(28~34HRc) plastic mold steel. It no need further heat treatment. So, you don’t have any worry about distortion or cracking.
   
  P20 tool steel property is very similar with GB 3Cr2Mo, IOS 35CrMo2, DIN 1.2311 steel. At most work environment, P20 steel is equivalent with 1.2311, 35CrMo2, 3Cr2Mo mold steel.
   
  P20 steel properties Related Specifications ASTM A681-1999 | JIS G4404(2000) | GB1299  P20 Tool Steel Data PDF files Down
   
  Chemical composition
  C(％) 0.28～0.40 Si(％) 0.20～0.80 Mn(％) 0.60～1.00
  P(％) ≤0.030     S(％) ≤0.030     Cr(％) 1.40～2.00
  Mo(％) 0.30～0.55
  
  Form of Supply
   

  

  ASTM P20 tool steel, we can supply the P20 steel round bar, steel flat bar, steel plate, hexagonal steel bar and steel square block. P20 steel round bar can be sawn to your required lengths as one offs or multiple cut pieces. Rectangular pieces can be sawn from flat bar or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.
   
   
  Applications
   
  ASTM P20 Tool steel is a American plastic Die steel material, the steel by “super clean” production process, pre hardened, showing the height of micro pure and excellent homogeneous structure, excellent polishing and light etching engraving. After heat treatment, processing and polishing performance is good, can be carried out, and can be processed, suitable for the surface treatment of chrome, material hardness, good toughness, good mechanical processing performance. Gold microstructure is martensite and bainite structure. Mostly be applied to in plastic steel mold. like car injection moulding, PVC plastic injection molding.
   
  Processing
  P20 tool steel round bar and flat sections can be cut to your required sizes. P20 tool steel ground bar can also be supplied, providing a high-quality tool steel precision ground tool steel bar to your required tolerances. P20 tool steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.
   
  Forging of Plastic mold steel AISI P20 steel material
  Slowly Heat to 930-1050 °C, keep the temperature to heat thoroughly. Start forging. Finished cool slowly.
   
  Annealing of Din P20 plastic mold tool steel material
  Heat to 775 to 790 °C, soak enough time, ensure heat thoroughly. then cool in the heat treatment furnace.
   
  Quenching of p20 material
  820-840°C, quench in oil. get p20 steel material hardness 28~34HRc
   
  Tempering of P20 plastic mold steel grade material
  Heat uniformly at the tempering temperature for P20 tool steel material. keep enough time, then cool in air
   
  Advice temperature 100 to 600 °C. more P20 mold tool steel heat treatment data, pls contact your heat treatment supplier.
  

  ■ PLASTIC MOULD STEEL

  塑胶模具钢

  编号 NO:	近似钢号					用途	Application
  	中国GB	美国AISI	德国DIN	日本JIS	外企 Foreign Enterprise
  1	3Cr2Mo	P20	1.2311			预硬注塑模，可一般抛光	For pre-hardened pouring plastic mold,can polish currently
  2	3Cr2NiMo	P20+Ni	1.2738		ASSAB71B	预硬大尺寸注塑模，可一般抛光	For pre-hardened big sizes of pouring plastic mold, can polish generally
  3	15Ni3Mn	P21			NAK80	预硬度高，可机加工，可焊接的镜面塑胶模	Good pre-hardened,plastic mold of mirror surface, can be machined and welded
  4	2Cr13	410	1.4021	SUS410		汽轮机叶片	Vane for sreamer
  5	4Cr13	420	1.2083	SUS420J2	ASSAB S136	抗锈蚀，镜面抛光的镜片模与塑胶模	For mold of polishing glasses and plastic
  6	3Cr17NiMnMo	420	1.2316	SUS420J2	BOHLER M300	高抗锈蚀的塑胶模	For mold of plastic with stronger corrupt-resisting

   

  编号 NO:	塑胶模具钢化学成份(% ) Chemical composition											退火状态 硬度≤ Annealed  Hardness	热处理温度(℃) Heal treatment temp		回火硬度 HRC Secondary hardness
  	C	Si	Mn	P≤	S≤	Cr	W	Mo	Cu	V	Al		淬火  Hardening	回火 Tempering
  1	0.35	0.60	0.85	0.030	0.030	1.80	—	0.45	—				预硬 Pre-hardening		29-35
  2	0.38	0.35	1.30	0.030	0.015	1.90	1.00	0.35	—				预硬 Pre-hardening		30-36
  3	0.15	0.35	1.00	0.030	≤0.015	0.30	3.20	0.30	1.00		1.00		预硬 Pre-hardening		37-43
  4	0.20	≤1.00	≤1.00	0.035	0.030	13.00	≤0.60	—	—			223	960	700	29-34 50-52
  5	0.39	0.60	0.80	0.028	0.020	13.50	≤0.60	—	—			255	预硬1025	预硬510	28-34
  6	0.39	W1.00	0.80	0.028	0.020	16.00	≤1.00	1.20	—			255	预硬1010	预硬500	44