P20+S steel has good cutting properties, usually uses plastic mold, Injection molding, and die mold. The P20+S steel materials delivery condition as per different customer requirements, usual delivery condition as Pre-hardness, hardness 28-34 HRc. Saaj steel is a professional AISI P20S tool steel supplier, Inventory, and manufacturer.
Tool steel P20 + S is suitable for mold production, improve the machining performance is required. Typical applications include support and injection mold, mold holders and zinc die casting mold. P20S is a versatile plastic mold and the characteristics of high-strength steel are applicable to many other applications, such as axis and wear a belt.
P20+S is a high alloy Chrome Cold work tool steel. ASTM A681 AISI P20 steel standards and steel grades equivalent as below:
Addition to other grades:
MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, OHNS, D2, D3, H-11, H-13, CW-1, M2, M35, M42, 2714, SKD-11, P20, P20+Ni, SCM 420, ASTM SA-36, ASTM SA-105, SAE 1018, SAE 1020, SAE 4140, SAE 8620, 16MNCR5, 20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE 52100, S40C, S355J2G3.
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The following table shows the chemical composition of P20+S steel:
AISI P20+S Steel Mechanical Properties
Poisson’s ratio 0.27-0.30
Izod impact unnotched 28.0 J
Elastic modulus 190-210GPa
28-34 HRC P20+S is not suitable for polishing or applications where a fine finish is required.
Heat treatment temperatures, including the rate of heat, cool, and soak times will vary due to factors such as the shape and size of each steel component. Please consult your heat treatment provider for full guidance on heat treatment of tool steel P20+S.
830-870°C, quenching in oil.
Heat to tempering temperature then cools in air.
Thermal expansion: 12 x 10-6/ºC, 20-100°C
Slowly heat P20+S to 1050°C，start forging, ensure forging temperature no lower than 930°C.
When dies made from P20+S are heavily machined, we recommend stabilizing the steel just before finish machining in order to relieve machining strains. Heat up to 460-500°C, soak well, and cool in the air.
Heat to 710-740°C. Soak enough time, ensure heat thoroughly, then cool in the furnace slowly.
60-65% of a 1% carbon steel
Steel AISI P20, of medium carbon content typically around 0,35 %, is supplied in the quenched and tempered condition with a hardness of 30-32 HRC. It has a long history of success in the industry of molds of injection of plastics, however with serious problems when repaired by welding, when it is indispensable a post-weld heat treatment for tempering and stress relieving, with negative effects on dimensional stability, the necessity of machining rework and lower productivity.
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