Stainless Steel Grade Datasheets - Atlas Steels

1 Stainless SteelGrade Atlas SteelsRevised : August 2013 Atlas SteelsTechnical DepartmentATLAS Steels Stainless Steels Grade DatasheetsFOREWORDThis compilation of Stainless Steel Grade Datasheets has been produced by Atlas Steels technical Department asa companion to the Atlas technical handbook of Stainless Steels . Any suggestions for improvements, additionsor corrections would be very welcome; these should be directed to: technical Manager, Atlas SteelsTelephone +61 3 8383 9863, Grade Datasheets are available from the Atlas Steels website. Information from any Atlaspublication can be freely copied, but it is requested that the source be of LiabilityThe information contained in these Datasheets is not an exhaustive statement of all relevant information. It is ageneral guide for customers to the products and services available from Atlas Steels and no representation ismade or warranty given in relation to this information or the products or processes it by Atlas Steels technical DepartmentCopyright Atlas Steel DatasheetsRevised November 2011 Page 1 of Stainless Steels301, 301L, 301 LNHigh strength for roll formed structural components302 HQLow work hardening rate Grade for cold heading fasteners303, 303 SeFree-machining bar grades304, 304L, 304 HStandard 18/8 grades310, 310S, 310 HHigh temperature resistant grades316, 316L, 316 HImproved resistance to pitting corrosion in chloride environments321, 321H, 347 Stabilised grades for heavy section welding and high temperature applications253MA (S30815)

2 High temperature resistant grade904 LHigh resistance to general corrosion, pitting and stress corrosion crackingFerritic Stainless SteelsAtlasCR12 Utility Steel resistant to wet abrasion and mild corrosionAtlasCR12 TiUtility Steel resistant to wet abrasion and mild corrosion weld stabilised409 Automotive exhaust Grade weld stabilised430, 430 FResistant to mildly corrosive environmentsF18S / 439 Resistant to mildly corrosive environments weld stabilisedF20SA ferritic alternative to Grade 304 / 304L weld stabilisedF18MS / 444A ferritic alternative to Grade 316 / 316L weld stabilisedDuplex Stainless Steels2101 Lean duplex economical alternative to 304 and 3162304 Duplex alternative to Grade 3162205 Standard duplex Stainless Steel - high resistance to pitting and stress corrosion2507 Super duplex with very high resistance to pitting and stress corrosion2507 CuSuper duplex with very high resistance to pitting and stress corrosionMartensitic Stainless Steels410 Standard martensitic Grade for low-duty hardened applications416 Free-machining bar grade420 Higher hardness martensitic Grade for cutlery, cutting tools and dies431 High hardness and toughness Grade , primarily for shafting440A, 440B.

3 440 CVery high hardness grades used in cutting toolsPrecipitation Hardening Stainless Steel630(17-4PH) High strength shafting gradeNote that some of these Stainless Steel grades are commonly referred to by designations that are of LiabilityThe information contained in this datasheet is not an exhaustive statement of all relevant information. It is a generalguide for customers to the products and services available from Atlas Steels and no representation is made or warrantygiven in relation to this document or the products or processes it Data Sheet301 301L 301 LNRevised May 2008 Page 1 of 301is a high work-hardening rateaustenitic Stainless Steel . It can be suppliedwith a tensile strength of up to over 1300 MPain strip and wire forms, to produce tempers inthe range of 1/16 Hard to Full Hard. Thecontrolled analysis of Grade 301 enables it toretain sufficient ductility in conditions up to 1/2 Hard conditions to be roll or brake formed intoaircraft, architectural and particularly rail carstructural components.

4 However, 3/4 to FullHard tempers should be used whenever highwear resistance and spring features arerequired in components of simple form 301L with low carbon is preferred forimproved ductility or if heavy sections are to bewelded, and another variant 301LN has ahigher nitrogen content to compensate for thelower A666 covers all three variants, and someare also included in Japanese specification JISG4305 and Euronorm EN ResistanceCorrosion resistance is similar to that of resistance in applications involvingexternalexposuretomildlycorrosi veconditions at ambient ResistanceGood oxidation resistance in intermittentservice to 840 C and in continuous service to900 C, although not usually chosen for thisenvironment. Exposure to temperatures aboveabout 400 C will result in progressive removalof work hardening effects; at approximately800 C the strength will be similar to anannealed 301.

5 In creep applications a workhardened Grade 301 can even reduce to lowerstrength than an annealed TreatmentSolution Treatment (Annealing)Heat to 1010-1120 C and cool rapidly. Use lowside of range for intermediate annealing. Thisgrade cannot be hardened by WorkingGrade 301 and its low carbon variants are usedwhere a high strength Stainless Steel isrequired. The grades work harden at the veryhigh rate of approximately 14 MPa/%Ra (14 MPaincrease in tensile strength for each 1%reduction of area of cold work), resulting inhigh achievable strengths from cold rolling is at least partially transformed tomartensite by this work. Despite the highstrengths achieved there is still enoughresidual ductility to enable significant colddeformation. Although non-magnetic in theannealed condition, when cold worked thegrades become strongly attracted to a characteristics suited to all Welds in Grade 301 must beannealed for maximum corrosion resistance;this is not necessary in 301L or 301LN.

6 Weldingand post weld annealing will both remove highstrength induced by prior cold welding is commonly used to assemblecold rolled 301 components. The very smallheat affected zone associated with this rapidwelding technique results in little reduction ofoverall component ApplicationsRail car structural components - often rollformed, brake pressed or stretch formed toprofiles but also used flat. Airframe trailer components. Automotive wheelcovers, wiper blade holders and clips. Toastersprings, stove element clips. Screen frames,curtain Data Sheet301 301L 301 LNRevised May 2008 Page 2 of PropertiesThe properties for Grade 301 are specified for flat rolled product (plate, sheet and coil) in ASTMA666. Similar but not identical mechanical properties are specified in EN and JIS G4305and in proprietary Specification (%) Property Specification( Grade 301 other values for 301L and 301LN)Bend Test( - thick) Grade 301 TemperASTM A666 TensileStrength(MPa) Proof(MPa) (% in 50mm)(thick.)

7 > ) Angle( )Factor(Note 1)HardnessRockwellC(Note 2)Annealed5152054018011/16 Hard6203104018011/8 Hard6903804018011/4 Hard8605152590225 321/2 Hard10357601890232 373/4 Hard12059301290337 41 Full Hard1275965990541+Notes 1. Bend test is around a diameter of the Bend Factor multiplied by the Steel Hardness values are typical industry standard there are no specified Properties(Grades 301, 301L and 301LN - typical values in the annealed condition)Mean Coefficient of ThermalExpansionThermalConductivityGrade Density(kg/m3)ElasticModulus(GPa)0-100 C( m/m/ C)0-315 C( m/m/ C)0-538 C( m/m/ C)at 100 C( )at 500 C( )SpecificHeat0-100 C( )ElectricalResistivity(n .m) Specification comparisons areapproximate only. The list is intended as a comparison of functionallysimilar materialsnotas a schedule of contractual equivalents. If exact equivalents are neededoriginal specifications must be consulted.

8 Different comparisons apply to grades 301L and Alternative GradesGradeWhy it might be chosen instead of 301 / 301L / 301LN304 Better availability, lower cost; the lower work hardening rate of 304 is corrosion resistance needed; the lower work hardening rate of 316 is acceptableLimitation of LiabilityThe information contained in this datasheet is not an exhaustive statement of all relevant information. It is a generalguide for customers to the products and services available from Atlas Steels and no representation is made or warrantygiven in relation to this document or the products or processes it Data Sheet302 HQRevised May 2008 Page 1 of 302 HQis a specialised wire Grade withvery wide usage for manufacture of stainlesssteel fasteners. The inclusion of 3% copper inthe composition reduces the cold workhardening rate substantially compared toGrade 304.

9 302HQ is standard for manufactureof self-tapping screws and light machinescrews; it is also used for some bolts, setscrews, rivets and specialised fasteners. It hasnow totally replaced Grades 384 and 305 forcold heading applications, copper being a lowercost alternative to their high nickel designation 302HQ is not standardised ASTM specifications list the Grade as UNSS30430, and alternative designations for thesame Grade include "XM-7", "304Cu" and"304HQ". The standard specification forstainless Steel fasteners, ISO 3506, includes302HQ as an acceptable composition forfastener Grade A2 ; it is commonly producedin strength grades A2-70 and stable austenitic structure makes 302 HQnon-magnetic, even after substantial coldwork, and also results in excellent toughness,even down to cryogenic ResistanceEqual to or exceeding that of Grade to pitting and crevice corrosion inwarm chloride environments, and to stresscorrosion cracking above about 50 C.

10 302HQ isconsidered resistant to potable water with upto about 200mg/L chlorides at ambienttemperatures, reducing to about 150mg/L at60 C. Consult Atlas technical Assistance forspecific environmental ResistanceGood oxidation resistance in intermittentservice to 870 C and in continuous service to925 C. Continuous use of Grade 302HQ in 425-860 C range is usually safe (free of carbideprecipitation) as the Grade has a very lowcarbon TreatmentSolution Treatment (Annealing)Heat to 1010-1120 C and cool rapidly. Thisgrade cannot be hardened by Grade 308L rods or electrodes. Excellentweldability by all standard fusion methods,both with and without filler metals. Because ofits applications this Grade is not often are resistance butt welding to joinwires together during wire manufacture, andwhen the Grade is used to make stud weldingfasteners.