Tham khảo tài liệu 'stainless steel manual part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Austenitic 88 UNS S30403 Type 304L Type 304L is a low carbon austenitic chromiumnickel stainless steel with general corrosion resistance similar to that of Type 304 but with superior resistance to intergranular corrosion following welding or stress relieving. It is sug gested for use in certain corrosive environments for parts which can not be annealed after fabrication by welding. Parts made of Type 304L are generally limited to service at temperatures up to 800 F 425 C . See also the Section on Typical Applications. UNS S30403 Chemical Composition Limits Cast or Heat Analysis Percent c Mn p s Si Cr Ni N ỊLQ Max Max Max Max Max Max Physical Properties in the Annealed Condition Modulus of Elasticity in Tension 1 psiMPa X 106 1 93 000 Modulus of Elasticity in Torsion psiMPa X 106 86 200 Density Ib in1 kiĩ mi 8 027 Electrical Resistivity Microhm mm 68 F 20 C 720 212 F 100C 780 392 F 200 C 860 752 F 400 C 1000 1112 F 600 C 1110 1472 F 800 C 1210 1652 F 900 C 1260 Specific Heat Btu lb F kJ kíp K 32-212 F 0-100 C Thermal Conductivity Btu ft h F W mK 212 F 100 C 932 F 12 4 500 C Mean Coefficient of Expansion in in F cm cm C 32-212 F X 10 0-100 C X 10 32-600 F X 106 o-315 c X 10 32-1000 F X 10 o-538 c X 10 32-1200 F X 10 0-649 C X 10 68-1600 F X 10 20-871 C X 10 Melting Range F C 2550-2650 1399-1455 Magnetic Permeability H m Annealed Max Thermal Treatment Initial Forging F__ C 2100-2300 1149-1259 Annealing F C 1850-2050 1008-1120 Hardening Hardenable by cold work only. aAs cold worked the modulus is lowered. By stress relief heat treatment the lowered modulus may be increased. 89 UNS S30403 MECHANICAL PROPERTIES Form and Condition ASTM Specification Tensile Strength ksi MPa Min Yield Strength ksi MPa Min Elongation Min Reduction in Area Min Hardness HB Max HR Max Plate Sheet Strip
