Page:Title 3 CFR 2002 Compilation.djvu/45

 Proc. 7529 Title 3--The President ANNEX (conttnued) 12 (C) hot-rolled TRIP steel w\177th mainly ferr\177t\177c-baimtic matrix w\177th dispersed residual austemte islands w\177th the following propernes tensile strength over 700 MPa and an elongation percentage over 25 percent lbr thickness between I 6 and 5.0 mm; (xxH) plastic mold steel products designated as X-134, as described below: I A) products known as "NAK 80," which is a plastic mold steel used for apphcatmns such as clear lens molds and extremely critical dmmond finish applications, w\177th the following ' chemical composition (nominal, by weight): carbon 0.15 percent, manganese 1.50 percent, molybdenum 0.30 percent, copper 1.00 percent, silicon 0.30 percent, mckel 3.00 percent, aluminum 1.00 percent; mechanical properties: HRc 40; tensile strength, 1264 MPa; reductmn 41.9 percent; yield strength (0.2 percent offset, 41 HRc) 1018 M Pa; elongation in 50 mm (longitudinal) 16. I percent; modulus of elasticity (room temp.) 200 GPa.; Charpy V-Notch impact strength (toughness): longitudinal 11.0 J.; transverse I 1.5 J.; hardness 40 HRc; physmal properties: coefficient of thermal expansion (10 '6/K), 20'C to 100'C: I 1.3, 20'C to 200'C = 12.6, 20'C to 300'C: 13.5; coefficient of thermal conductivity (J/s'm. K) at 93'C = 41.4, at 204 'C - 42.2; magnetic properties: maximum magnetic permeability 380, saturated magnetism (gauss) 16.360, residual magnetism (gauss) 8,500, and coercive force (Oersted) 14.0; double melted, first in an electric furnace then a vacuum arc re-melt furnacc, hot-rolled or forged to shape and age hardened to HRc 40; produced through a super clean, vacuum-arc remelt manufacturing process; (B) products known as \177PX5," whmh \177s a plastic mold steel used in all types of plastic molding and design, and is superior to AISI grade P20-type steels in terms of machining, stability, and welding; with the following chemical composition (nominal, by weight): carbon 0.20 percent, manganese 1.90 percent, sulfur 0.035 percent, molybdenum 0.45 percent, copper 0. l0 percent, sdmon 0.10 percent, phosphorus 0.010 percent, nickel 0.20 percent, aluminum 0.030 percent, chromium 2. I 0 percent: mechanical properties: HRc 30 - 33; tensde strcngth, 1034 MPa; reduction 48 percent; y\177eld strength 917 MPa; elongation m 50 mm (longitudinal) 20 percent; physical propcrees: coefficient of thermal expansion (10'6/K), 20'C to 100'C = I 1.9, 20'C to 200'C = 12.8, 20'C to 300'C = 13.1,20'C to 400'C = 13.5, 20'C to 600'C = 14.0; coefficient of thermal conductivity (J/s.mK) at 20'C = 42.5, at100 'C = 42.4, at 200'C = 42.1, at300 'C = 39.2, at 400'C = 38.8. PX5 is produced by electric furnace melting, ladle degassed and refined; proprietary forging, rolling and heat-treating practices are utilized to produce an exceptionally fine-grained, stable, tough and easy to machine and weld mold steel; (C) products known as "CX I," which is is a proprietary cold work die steel that is supplied heat treated to hardness of HRc 50, and can also be machined at this hardness, with the following chemical composition (nominal, by weight): carbon 0.80 percent, manganese 1.30 percent, chromium 1.00 percent, molybdenum 0.80 percent; mechanical properties (as supphed): HRc 50; tensile strength 1786 MPa; yield strength 1641 MPa; elongation 8 percent; reduction in area 19 percent; physical properties: coefficient of linear thermal expansion ( 10 \177'/K): 20\370C to 200 \370C = 12.9; 20 \370C to 425 \370C = 13.9; coefficient of thermal conductivity (J/s. inK) at 20 \370 C = 30.7; density: 7.71 (Mg/m3); produced by electric furnace melting, ladle degassrag and refining; proprietary forging, rolling and heat-treating practices utilized to produce an exceptionally fine-grained, stable, tough and easy to machine and weld die steel; or (D) products known as "Super NAK" ("NAK HH"), which is a plastic mold steel that provides a unique combination of high hardness and ability to machine-work the steel; with the following chemical composition (nominal, by weight): carbon 0. I I percent, manganese 1.4 percent, copper 1.0 percent, chromium 1.6 percent, aluminum 1.0 percent, silicon 0.30 percent, sulfur - 0.35 percent, nickel 3.0 percent, molybdenum 0.3 percent; physical properties: HRc 45; tensile strength 1385 MPa longitudinal, 1359 MPa transverse; yield strength 1031 MPa longitudinal, 1009 transverse, elongation 1 I percent longitudinal, 4 32

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