Machinery's Handbook, 31st Edition
Alloy Steels 415 436 (S43600): Similar to types 430 and 434. Used where low “roping” or “ridging” re- quired. General corrosion and heat-resistant applications, such as automobile trim. 440A (S44002): Hardenable to higher hardeness than type 420 with good corrosion resistance. Cutlery; bearings; surgical tools. 440B (S44003): Cutlery grade. Cutlery; valve parts; instrument bearings. 440C (S44004): Yields highest hardnesses of hardenable stainless steels. Balls; bear ings; races; nozzles; balls and seats for oil well pumps; valve parts. 442 (S44200): High-chromium steel, principally for parts that must resist high service temperatures without scaling. Furnace parts; nozzles; combustion chambers. 446 (S44600): High-resistance to corrosion and scaling at high temperatures, espe- cially for intermittent service; often used in sulfur-bearing atmosphere. Annealing boxes; combustion chambers; glass molds; heaters; pyrometer tubes; recuperators; stirring rods; valves. 501 (S50100): Heat resistance; good mechanical properties at moderately elevated tem peratures. Heat exchangers; petroleum refining equipment. 502 (S50200): More ductility and less strength than type 501. Heat exchangers; petro leum refining equipment; gaskets. Chromium-Nickel Austenitic Steels.— (Not capable of heat treatment) SAE 30201: This steel is an austenitic chromium-nickel-manganese stainless steel usually required in flat products. In the annealed condition, it exhibits higher strength values than the corre sponding chromium-nickel stainless steel (SAE 30301). It is nonmagnetic in the annealed condition, but may be magnetic when cold-worked. SAE 30201 is used to obtain high strength by work-hardening and is well suited for corrosion-resistant structural members requiring high strength with low weight. It has excellent resistance to a wide variety of corrosive media, showing behavior comparable to stainless grade SAE 30301. It has high ductility and excellent forming properties. Owing to this steel’s work-hardening rate and yield strength, tools for forming must be designed to allow for a higher springback or recovery rate. It is used for automotive trim, automotive wheel covers, railroad passenger car bodies and structural members, and truck trailer bodies. SAE 30202: Like chromium-nickel stainless steel SAE 30302, this is a general-purpose stainless steel. It has excellent corrosion resistance and deep drawing qualities. It is non hardenable by thermal treatments but may be cold-worked to high tensile strengths. In the annealed condition, it is nonmagnetic but slightly magnetic when cold-worked. Applica tions for this stainless steel are hub cap, railcar and truck trailer bodies, and spring wire. SAE 30301: Capable of attaining high tensile strength and ductility by moderate or se- vere cold-working. It is used largely in the cold-rolled or cold-drawn condition in the form of sheet, strip, and wire. Its corrosion resistance is good but not equal to SAE 30302. SAE 30302: The most widely used of the general-purpose austenitic chromium-nickel stainless steels. It is used for deep drawing largely in the annealed condition. It can be worked to high tensile strengths but with slightly lower ductility than SAE 30301. SAE 30303F: A free-machining steel recommended for the manufacture of parts pro duced on automatic screw machines. Caution must be used in forging this steel. SAE 30304: Similar to SAE 30302 but somewhat superior in corrosion resistance and having superior welding properties for certain types of equipment. SAE 30305: Similar to SAE 30304 but capable of lower hardness. Has greater ductility with slower work-hardening tendency. SAE 30309: A steel with high heat-resisting qualities which is resistant to oxidation at temperatures up to about 1800 ° F (980 ° C). SAE 30310: This steel has the highest heat-resisting properties of the chromium nickel steels listed here and will resist oxidation at temperatures up to about 1900 ° F (1040 ° C).
Copyright 2020, Industrial Press, Inc.
ebooks.industrialpress.com
Made with FlippingBook - Share PDF online