I'll do anything you ask me to because I'll always be here for you and you'll never be bored again. We'll throw your homework in the fire and take the car downtown. Nothing will be a drag. I'll take polaroids of you when you're frowning and put them on magazine cutouts of cats and muscle men and we'll laugh and look into each others eyes, because your sadness will have disappeared. I will equivocate the absurdity of your bummer with that of your foto on a kitty. I'll help you learn how to ice skate backwards while we listen to Simply Red's "Holding Back the Years." I promise everything and deliver everything. Even our lulls will be poignant as we lay in the grass at the park near a museum of modern art and I feed you oranges. Seedless, of course. Because you're too pretty to have to spit, ever.
Stainless Steel - Grade 304
Chemical Formula
Fe,
Topics Covered
Background
Key Properties
Composition
Mechanical Properties
Physical Properties
Grade Specification Comparison
Possible Alternative Grades
Corrosion Resistance
Heat Resistance
Heat Treatment
Welding
Machining
Dual Certification
Applications
Background
Grade 304 is the standard "18/8" stainless; it is the most versatile and most widely used stainless steel, available in a wider range of products, forms and finishes than any other. It has excellent forming and welding characteristics. The balanced austenitic structure of Grade 304 enables it to be severely deep drawn without intermediate annealing, which has made this grade dominant in the manufacture of drawn stainless parts such as sinks, hollow-ware and saucepans. For these applications it is common to use special "304DDQ" (Deep Drawing Quality) variants. Grade 304 is readily brake or roll formed into a variety of components for applications in the industrial, architectural, and transportation fields. Grade 304 also has outstanding welding characteristics. Post-weld annealing is not required when welding thin sections.
Grade 304L, the low carbon version of 304, does not require post-weld annealing and so is extensively used in heavy gauge components (over about 6mm). Grade 304H with its higher carbon content finds application at elevated temperatures. The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.
Key Properties
These properties are specified for flat rolled product (plate, sheet and coil) in ASTM A240/A240M. Similar but not necessarily identical properties are specified for other products such as pipe and bar in their respective specifications.
Composition
Typical compositional ranges for grade 304 stainless steels are given in table 1.
Table 1. Composition ranges for 304 grade stainless steel
Grade
C Mn Si P S Cr Mo Ni N
304 min.max. -0.08 -2.0 -0.75 -0.045 -0.030 18.020.0 - 8.010.5 -0.10 304L min.max. -0.030 -2.0 -0.75 -0.045 -0.030 18.020.0 - 8.012.0 -0.10 304H min.max. 0.040.10 -2.0 -0.75 -0.045 -0.030 18.020.0 - 8.010.5 -
Mechanical Properties
Typical mechanical properties for grade 304 stainless steels are given in table 2.
Table 2. Mechanical properties of 304 grade stainless steel
Grade
Tensile Strength (MPa) min
Yield Strength 0.2% Proof (MPa) min
Elongation (% in 50mm) min
Hardness
Rockwell B (HR B) max
Brinell (HB) max
304 515 205 40 92 201 304L 485 170 40 92 201 304H 515 205 40 92 201
304H also has a requirement for a grain size of ASTM No 7 or coarser.
Physical Properties
Typical physical properties for annealed grade 304 stainless steels are given in table 3.
Table 3. Physical properties of 304 grade stainless steel in the annealed condition
Grade
Density (kg/m3)
Elastic Modulus (GPa)
Mean Coefficient of Thermal Expansion (mm/m/°C)
Thermal Conductivity (W/m.K)
Specific Heat 0-100°C (J/kg.K)
Electrical Resistivity (nW.m)
0-100°C 0-315°C 0-538°C at 100°C at 500°C 304/L/H 8000 193 17.2 17.8 18.4 16.2 21.5 500 720
Grade Specification Comparison
Approximate grade comparisons for 304 stainless steels are given in table 4.
Table 4. Grade specifications for 304 grade stainless steel
Grade
UNS No
Old British
Euronorm
Swedish SS
Japanese JIS
BS En No Name
304 S30400 304S31 58E 1.4301 X5CrNi18-10 2332 SUS 304
304L S30403 304S11 - 1.4306 X2CrNi19-11 2352 SUS 304L
304H S30409 304S51 - 1.4948 X6CrNi18-11 - -
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.
1.) Last nite a dj sniped my wife.2.) Songs about resources.3.) Converting the convertibles at N*I*T*E and scoping out the celestial bodies.
"Escape from the Planet of the Apes" is a really really good movie. Point of fashion: Rob Zombie's 10,000 Corpses is an hour and a half (seems longer) version of one of his album covers. Minus Shauna Ysault, foxy White Zombie (cousins?) bassist/fiancé extraordinaire. No pupils ever, he say. And shit-tons of old hot-rod cars and leather cowboy hats. Tits, ass. You know. And some blood. And old "Guitar Magazine" imagery thrown in for good measure.
Is "Lost" some sort o' allegory for the US via UK via Israel by way of arms dealing v. USSR v. Islam nations conflict? Get hip to the global theater, guys and gals.
Donald Barthelme, Nathaniel West, Saul Bellow, Phillip Roth, John Updike, Leonard Martin, Martin Amis, Thomas Hardy, Hardy Boys, William Faulkner, Thomas Pynchon, Lorrie Moore, Joseph Conrad, Jonathan Swift, and Evelyn Waugh. Especially Evelyn Waugh.
Short answer: Nathaniel West and Jimmy Buffet. Long answer: Well I was delivered to my parents in a cloak from outer space like superman, except my cloak was an intricate weave of Jim Beam and Gilbeys labels like the ones you mortals fashioned friendship braclets out of Juicy Fruit wrappers with, so I mean it's kind of hard to have a hero, and even still, he may die of bedsores! But if I had to choose, it would be Kirby Puckett of the '87 Minnesota Twins. Then again, he beat his wife and had a gold placard outside of his house that said, "No Autographs, Please." I'd like the sign if every word wasn't capitalized. Well, he got the glaucoma in one eye so he's hard to have as a hero, too. He probably couldn't even see his wife in three dimensions when he was beating her, which is sad and kinda tragic. Heroes can't have physical defects or a penchant for running their wives into doorknobs, right? Maybe I'd pick Conan in "Conan the Destroyer," when Arnold breaks mirrors to defeat his enemies like a Jew getting over a bad cold. To defeat cults. But the cult looks kinda cool with the snakes and the James Earl Jones and the virgins falling from third story heights. Are we still talking about heroes?