Features of 1.2312 tool Steel

• 1 1.2312 Steel is a high-quality plastic tool mold steel, 1.2312 is 1.2311 add about 0.08% Sulphur improve free cutting ability of 1.2311 tool steel. It belongs to the high-quality medium carbon, Pre-hardness(28~34HRc) plastic mold steel. It needn’t further Make heat treatment for make plastic injection molding.
  1.2312 tool steel property is very similar with ASTM AISI P20S steel. At most work environment,40CrMnMoS8-6/1.2312 steel is equivalent with P20S tool steel.
   
  Related Specifications of Din WN-r 1.2312 tool steel material
   
  Chemical composition
  C(％) 0.35～0.45 Si(％) 0.30～0.50 Mn(％) 1.40～1.60 P(％) ≤0.030
  S(％) 0.05～0.10 Cr(％) 1.80～2.00  Mo(％) 0.15～0.25
  
  Form of Supply
  Din W-Nr 1.2312 Tool Steel is a nice Plastic Mold Steel, we can supply the 1.2312 round bar, steel flat bar, plate, hexagonal steel bar and steel square block.
   
  Applications
  DIN 1.2312 Tool steel is a plastic injection mold steel material, the steel by “super clean” produce 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 very 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. Main be applied to in plastic steel mold. like car injection molding, PVC, PP plastic injection molding etc.
   

  

  Heat Treatment and Mechanical properties
  Grade: 40CrMnMoS8-6
  Material No. W-Nr.: 1.2312 Tool Steel
  Hot working temperature / ℃: 1050 ~ 850
  Annealing temperature / ℃: 780 ~ 760
  After annealing, the hardness is less than or equal to 230 HBS
  Quenching temperature / ℃: 830 ~ 870
  Cooling medium: Oil
  Common tempering temperature / ℃: 640 ~ 680
  Hardness after tempering HRC|100 ℃: 51
  Hardness after tempering HRC|200 ℃: 50
  Hardness after tempering HRC|300 ℃: 48
  Hardness after tempering HRC|400 ℃: 45
   
  1.2312 tool steel round bar and flat sections can be cut to your required sizes. 1.2312 tool steel ground bar can also be supplied, providing a high-quality tool steel precision ground tool steel bar to your required tolerances. 1.2312 steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.
  
  
  

  ■ 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