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You can send RFQs by filling out the RFQ form below. Or you can fax RFQs to 800-707-3439. We will get back to you ASAP.   About Stainless Steel Stainless steel is an alloy, which is iron-based and contains various combinations of other elements to give it characteristics suitable for a wide range of applications. It is also called corrosion-resistant steel or CRES, particularly in the aviation industry. Most stainless or heat resisting steels are either melted by the electric furnace process or vacuum arc re-melted.  Heat treatment for hardness and strength is recommended mainly for the straight chromium steels. Cold working is generally utilized for the chromium-nickel classes of steel and has the advantage of increasing strength while retaining good ductility.  Stainless Steel: 13-8 Stainless Steel, 15-5 Stainless Steel, 17-4 Stainless Steel, 17-7 Stainless Steel, 301 Stainless Steel, 321 Stainless Steel        13-8 PH: 13-8 is a precipitation, age hardenable stainless steel. Its principal features are high transverse toughness, good resistance to general and stress corrosion cracking, and high strength that is developed by a single low temperature heat treatment. Applications This alloy has been used in aircraft components such as landing gear and structural sections, valves, shafts, and components in the petrochemical and nuclear industries. 15-5 PH: 15-5 PH is a chromium-nickel alloy containing a 5% copper additive, which permits it to be hardened by low temperature heat treatments. The high percentages of chromium and nickel give-15-5 PH excellent corrosion resistance, transverse toughness and forgeability.    Applications 15-5 PH finds extensive use in the aircraft and missile industries for parts ranging from instrumentation to landing gear components.   17-4 PH: One of the most widely used precipitation hardening grades in the business. While soft and ductile in the solution annealed condition, it is capable of high properties with a single precipitation or aging treatment. Characterized by good corrosion resistance, high harness, toughness and strength. Applications Commonly used in both aircraft and gas turbines, nuclear reactor, paper mill, oil field, and chemical process components. 17-7PH: 17-7 PH is a precipitation hardening steel capable of reaching very high strength and hardness without any loss of corrosion resist­ance. Surface scaling and distortion in heat treatment is eliminated by its ability to be treated at very low temperatures. In the annealed condition, it has excellent ductility and machinability. It retains remarkable mechanical and physical properties at high temperatures. Applications 17-7 PH is used for applications necessitating high strength, good corrosion resistance and good mechanical properties at elevated temperatures. Characteristic applications include surgical instruments, springs, bearings, aircraft panels, and etc. Stainless 301, 304, 304L, 321, 410   301: This grade is an austenitic stainless steel manufactured by the electric furnace process. Its chromium and nickel content are lower than most other grades, offering the advantage of a high work-hardening rate which combines cold-worked high strength with good ductility. Tensile strength and hardness increase rapidly when the metal is cold rolled, cold drawn, or worked at room temperature. The standards of the aircraft industry are met by requiring adequate discard to be extracted from each ingot.   Applications Type 301 finds its primary usage in products necessitating great strength, but where working at elevated temperatures is not required. Used extensively in aircraft components, truck components and bodies, decorative applications, and etc.  304, 304L: Type 304 decreases the carbon content and thereby eliminates the possibility of intergranular corrosion. This low carbon alloy is most often utilized for applications requiring welding. An Extra Low Carbon alloy, Type 304L is also available for especially severe welding applications. Type 304L has the capability to avert any detrimental precipitation in the extreme 800° F. to 1650° F. range.  Applications Both types are extremely popular in the food and dairy industries and for use in pharmaceutical equipment. It is exceedingly useful in applications where good mechanical properties and corrosion resistance are essential. It is highly desirable for products such as instrumentation where non-magnetism is fundamental. These grades are available in a wide range of forms and finishes.  321: Type 321 is non-heat treatable and non-magnetic in the annealed condition. This alloy contains 18% chromium, 8% nickel and a substantial addition of titanium. The titanium forms insoluble and stable carbide, which ties up all the carbon in the alloy and therefore prevents it from precipitating as chromium carbides. This leaves the chromium in solution to resist corrosion to a very high degree. This is extremely beneficial in high temperatures, as it eliminates the necessity for re-annealing after fabrication. Applications Type 321 is used principally for applications involving welding or sustained elevated tem­perature operations where re-annealing is not practical, It is used extensively in the aircraft and missile industries for engine parts, heat exchangers, exhaust stacks, rocket engines, manifolds, and etc.   410: Type 410 is a magnetic, martensitic, heat treatable alloy that is 12% straight chromium. It has excellent creep strength and corrosion resistance. Heat treatments may be applied to develop a very wide range of mechanical properties and hardness. It is popularly used for parts operating at high temperatures. Applications Because of its high strength and versatility in heat treatment applicability, and because of its good mechanical and machining properties, Type 410 finds usage in a wide range of applications. It is used for low-cost cutlery, food industry machine parts, pump shafts, valve parts, compressor shrouds, and abrasive applications.   Stainless Steel Sheet, Plate, Bar & Tubing 1) 13-8 PH Stainless: AMS 5629, DMS 2100, STO160LB0013, ASTM-A564 (XM-13), AMS 5864, BMS7-322, RMS 150 2) 15-5 PH Stainless: AMS 5659, BMS 7-240, AMS 5862, ASTM-A564 (XM-12) 3) 17-4 PH Stainless: AMS 5643, AMS 5604, AMS 5622, ASTM-A564 (TYPE 630), UNS S17400 4) 17-7 PH Stainless: AMS 5644, AMS 5528, AMS 5529, MIL-S- 25043, UNS S17700   5) A286: AMS 5525 AMS 5731 AMS 5732 AMS 5734 AMS 5737 AMS 5804 AMS 5805 AMS 5853 AMS 5858 AMS 5895   6) 301 Stainless: AMS 5517, AMS5518, AMS 5519, AMS 5901, 301 1/2 Hard Stainless Steel Per AMS 5518 7) 303 SU Stainless: AMS 5640 TYPE 1, MIL-S-7720, ASTM-A582, AMS-S-7720, 303 Stainless Steel Round Bar x 12 FT 8) 303 SE Stainless: AMS 5640 TYPE 2, AMS 5641, MIL-S-7720, ASTM-A582 9) 304 / 304L Stainless: QQ-S-763, AMS 5639, AMS 5513, ASTM-A240, 304 / 304L Stainless Steel Plate Per AMS 5511, 304 / 304L Corrosion & Heat Resistant Alloy, Cold Finished & Annealed Per ASTM-A580 10) 321 Stainless: QQ-S-763, AMS 5645, AMS 5510, ASTM-A240, 321 2D Finish Stainless Steel Sheet Per AMS 5510 11) 330 Stainless: RA330, RA 330 UNS08330, EN 1.4886, ASME-B536, ASME-B511, ASTM SB-563, ASTM SB-511, ASTM SB-535, ASTM-B535, AMS 5592, AMS 5716, N08334, W88334, Seamless Pipe Sch 40 12) 403/410 Stainless: AMS 5612, AMS 5613, GE B50A459B-S6, 410 Stainless Steel Welded Pipe 13) 440C Stainless: QQ-S-763, AMS 5630, ASTM-A276 14) 450 Stainless: GE B50A789A-S13   15) A286 Stainless: AMS 5525 AMS 5731 AMS 5732 AMS 5734 AMS 5737 AMS 5804 AMS 5805 AMS 5853 AMS 5858 AMS 5895   Types of stainless steel There are different types of stainless steels: when nickel is added, for instance, the austenite structure of iron is stabilized. This crystal structure makes such steels virtually non-magnetic and less brittle at low temperatures. For greater hardness and strength, more carbon is added. With proper heat treatment, these steels are used for such things as razor blades, cutlery, and tools. Significant quantities of manganese have been used in many stainless steel compositions. Manganese preserves an austenitic structure in the steel as does nickel, but at a lower cost. Stainless steels are also classified by their crystalline structure: Austenitic, or 300 series, stainless steels make up over 70% of total stainless steel production. Ferritic stainless steels generally have better engineering properties than austenitic grades, but have reduced corrosion resistance, because of the lower chromium and nickel content. Martensitic stainless steels are not as corrosion-resistant as the other two classes but are extremely strong and tough, as well as highly machinable, and can be hardened by heat treatment. Precipitation-hardening martensitic stainless steels have corrosion resistance comparable to austenitic varieties, but can be precipitation hardened to even higher strengths than the other martensitic grades. The most common is 17-4PH. Duplex stainless steels have a mixed microstructure of austenite and ferrite, the aim usually being to produce a 50/50 mix, although in commercial alloys the ratio may be 40/60.   Comparison of standardized steels EN-standard Steel no. k.h.s DIN EN-standard Steel name SAE grade UNS     440A S44002 1.4112 X90CrMoV18 440B S44003 1.4125   440C S44004     440F S44020 1.4016 X6Cr17 430 S43000 1.4408 G-X 6 CrNiMo 18-10 316   1.4512 X6CrTi12 409 S40900     410 S41000 1.4310 X10CrNi18-8 301 S30100 1.4318 X2CrNiN18-7 301LN N/A 1.4307 X2CrNi18-9 304L S30403 1.4306 X2CrNi19-11 304L S30403 1.4311 X2CrNiN18-10 304LN S30453 1.4301 X5CrNi18-10 304 S30400 1.4948 X6CrNi18-11 304H S30409 1.4303 X5CrNi18-12 305 S30500   X5CrNi30-9 312   1.4541 X6CrNiTi18-10 321 S32100 1.4878 X12CrNiTi18-9 321H S32109 1.4404 X2CrNiMo17-12-2 316L S31603 1.4401 X5CrNiMo17-12-2 316 S31600 1.4406 X2CrNiMoN17-12-2 316LN S31653 1.4432 X2CrNiMo17-12-3 316L S31603 1.4435 X2CrNiMo18-14-3 316L S31603 1.4436 X3CrNiMo17-13-3 316 S31600 1.4571 X6CrNiMoTi17-12-2 316Ti S31635 1.4429 X2CrNiMoN17-13-3 316LN S31653 1.4438 X2CrNiMo18-15-4 317L S31703 1.4362 X2CrNi23-4 2304 S32304 1.4462 X2CrNiMoN22-5-3 2205 S31803/S32205 1.4539 X1NiCrMoCu25-20-5 904L N08904 1.4529 X1NiCrMoCuN25-20-7 1925hMo/6MO N08926 1.4547 X1CrNiMoCuN20-18-7 254SMO S31254     Please fill out the RFQ form below. 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