Stainless Steel 304 Square Bars, Round, Square, UNS S30400 Square Rods Supplier & Exporter

GENERAL PROPERTIES

Alloy 304 a T-300 series stainless steel austenitic, which has a minimum of 18% chromium and 8% nickel. Type 304 has a maximum carbon of 0.07% . It is the standard "18/8 stainless" that is commonly found in pans and cooking tools. Alloy 304 is the most versatile and widely used alloy in the stainless steel family. Ideal for a wide variety of home and commercial applications, Alloy 304 exhibits excellent corrosion resistance and has a high ease of fabrication, outstanding formability. The austenitic stainless steels are also considered to be the most weldable of the high-alloy steels and can be welded by all fusion and resistance welding processes.

APPLICATIONS

Alloy 304 Stainless Steel is used in a wide variety of home and commercial applications, including:

• Kitchen benches, sinks, troughs, equipment, and appliances
• Chemical containers, including for transport
• Food processing equipment, particularly in beer brewing, milk processing, and wine making
• Heat exchangers
• Architectural trim and molding
• Woven or welded screens for mining, quarrying & water filtration
• Automotive and aerospace structural use
• Nuts, bolts, screws, and other fasteners in the marine environment
• Construction material in large buildings
• Dyeing industry

STANDARDS-ALLOY 303

• ASTM/ASME: UNS S30400 / S30403
• EURONORM: 1.4301 / 1.4303
• AFNOR: Z5 CN 18.09 / Z2 CN 18.10
• DIN: X5 CrNi 18 10 / X2 CrNi 19 11

CORROSION RESISTANCE

• Resistance to moderately aggressive organic acids is a result of the 9 to 11% nickel that the 304 alloys contain.
• Resistance to corrosion in oxidizing environments is a result of the 18 to 19% chromium that the 304 alloys contain.
• The 304, 304L, and 304H may be considered to perform uniformly in most corrosive environments.

HEAT RESISTANCE

• Good oxidation resistance at temperatures up to 1700°F (927 °C)
• Continuous use of 304 in the 800-1580°F range is not recommended if subsequent aqueous corrosion resistance is important.
• Good oxidation resistance in intermittent service to 1600°F and in continuous service to 1690°F.

PROPERTIES OF 304 ALLOY

WELDING CHARACTERISTICS

Excellent welding properties; post-weld annealing is not required when welding thin sections. Two important considerations in producing weld joints in the austenitic stainless steels are:

• avoidance of cracking
• preservation of corrosion resistance

PROCESSING - HOT FORMING

• To forge, heat uniformity to 2100 / 2300 °F
• Do not forge below 1700 °F
• Forging can be air cooled without danger of cracking

PROCESSING - COLD FORMING

• Its austenitic structure allows it to be deep-drawn without intermediate annealing, Making this the stainless steel grade of choice in the manufacturing of sinks, hollow-ware and saucepans.
• These grades work harden rapidly. To relieve stresses produced in severe forming or spinning, parts should be full annealed or stress relief annealed as soon as possible after forming.

MACHINABILITY

• The use of chip breakers is advised since the chips can be stringy. Stainless steel work harden rapidly, heavy positive feeds, sharp tooling, and a rigid set-up should be used.of cut below the work-hardened layer resulting from the previous passes.

CHEMICAL PROPERTIES:

	C	Mn	Si	P	S	Cr	Ni	N
304	0.07max	2.0max	0.75max	0.45max	0.03max	min: 18.0 max: 20.0	min: 8.0 max: 10.5	—

MECHANICAL PROPERTIES:

Grade	Tensile Strength ksi (min)	Yield Strength 0.2% ksi (min)	Elongation %	Hardness (Brinell) MAX	Hardness (Rockwell B) MAX
304	75	30	40	201	92

PHYSICAL PROPERTIES:

Density lbm/in3	Thermal Conductivity (BTU/h ft. °F)	Electrical Resistivity (in x 10-6)	Modulus of Elasticity (psi x 106	Coefficient of Thermal Expansion (in/in)/ °F x 10-6	Specific Heat (BTU/lb/ °F)	Melting Range (°F)
at 68°F: 0.285	9.4 at 212°F	28.3 at 68°F	28	9.4 at 32 – 212°F	0.1200 at 68°F to 212°F	2500 to 2590
	12.4 at 932 °F	39.4 at 752°F		10.2 at 32 – 1000°F
		49.6 at 1652 °F		10.4 at 32 – 1500°F

SQUARE BAR PRODUCT OVERVIEW:-

Stainless Steel Square Bar
Thickness Range of Stainless Plate	3/16″ THRU 4″ (LARGER SIZES AVAILABLE UPON REQUEST)
Grades	202, 304/304L, 316/316L,304H, 316H, 309/S, 310/S, 317/L, 321/H, 347/H, 904L, 330, 254SMO, 410. In duplex grades, we can supply 2205 and 2507. Some nickel Alloy such as alloy 200/201, C276, Alloy 400, Alloy 600, Alloy 625, Alloy 800H, Alloy 800HT, 254SMO, AL6XN and others Titanium alloys and copper alloys are also available

INVENTORY:-

• X = Stocked Item
• P = Call For availability square bar can be cut to size.
• Square bar can be polished per customer specifications.
• Square bar is stocked in Penn met 2000 for improved machinability.

Size in Inches	Wt per Ft	Wt per 12′	303	304/L	316/L	416
3/16″	0.120	1.440	X	X	X	P
1/4″	0.210	2.52	X	X	X	P
5/16″	0.330	3.96	X	X	X	X
3/8″	0.480	5.76	X	X	X	X
7/16″	0.650	7.80	X	X	X	X
1/2″	0.850	10.20	X	X	X	X
9/16″	1.080	12.96	X	X	X	X
5/8″	1.330	15.96	X	X	X	X
3/4″	1.910	22.92	X	X	X	X
7/8″	2.610	31.32	X	X	X	X
1″	3.400	40.80	X	X	X	X
1-1/8″	4.310	51.72	X	X	X	X
1-1/4″	5.320	63.84	X	X	X	X
1-3/8″	6.400	76.80	X	X	X	X
1-1/2″	7.600	91.20	X	X	X	X
1-3/4″	10.400	124.80	X	X	X	X
2″	13.600	163.20	X	X	X	X
2-1/4″	17.200	206.40	X	X	X	X
2-1/2″	21.300	255.60	X	X	X	X
3″	30.63	367.56	X	X	X	P
4″	54.40	652.80	X	X	X	P

PROCESSING:-

Customers can select a number of processing options to produce stainless steel bars to their exact specifications, reducing materiel costs, production time, scrap and internal handling.

Long Product Processing Services Overview
Square Bar Cutting	Products cut include Round Bar, Flat bar, Hex bar, Square bar, Tubing and Hollow Bar, Pipe, Angles, channels, Beams and Tees.  Thickness range is 1/16″ to 28″ diameter
Square Bar Production Cutting	Penn Stainless can provide production cutting for product diameters up to 4″.  We utilize Amanda Production Equipment to achieve these precision cuts with tight tolerances.
Square Bar Polishing	Products polished included all tubular products, with OD & ID polishing available, Round Bar, Square Bar, Hex & Flat bar, Angles, Uneven Leg Angles, beams, and other shapes.

TOLERANCES FOR COLD AND HOT SQUARE BARS

COLD FINISHED SQUARE BAR TOLERANCES:

CF Tolerances	Plus	Minus
1/8″ to 5/16″ (exclusive)	0.000	0.002
5/16″ to 1/2″ (exclusive)	0.000	0.003
1/2″ to 1″ (inclusive)	0.000	0.004
over 1″ to 2″ (inclusive)	0.000	0.006
over 2″ to 3″ (inclusive)	0.000	0.008

COLD FINISHED SQUARE BAR STRAIGHTNESS TOLERANCES:

CF: 1/16 inch in any 5 foot; but may not exceed 1/16 X (length in ft/5)

HOT FINISHED SQUARE BAR TOLERANCES:

HF Tolerances	Plus	Minus	Out of Sq
Over 7/8″ to 1″ (inclusive)	0.009	0.009	0.013
Over 1″ to 1-1/8″ (inclusive)	0.010	0.010	0.015
Over 1-1/8″ to 1-1/4″ (inclusive)	0.011	0.011	0.016
Over 1-1/4″ to 1-3/8″ (inclusive)	0.012	0.012	0.018
Over 1-3/8″ to 1-1/2″ (inclusive)	0.014	0.014	0.021
Over 1-1/2″ to 2″ (inclusive)	1/64	1/64	0.023

HOT FINISHED SQUARE BAR STRAIGHTNESS TOLERANCES:

HF: 1/8 inch in any 5 foot; but may not exceed 1/8 X (length in ft/5)

STAINLESS STEEL SQUARE BAR SPECIFICATIONS:

Stainless Steel Square Bar Specifications
ASTM A276	This specification encompasses cold-finished or hot-finished bars, including rounds, squares, and hexagons, and hot-rolled or extruded shapes, such as angles, tees, and channels in the more commonly used types of stainless steels.
ASTM A479	This specification includes cold and hot finished stainless steel bars, including rounds, squares, and hexagons, and hot-rolled or extruded shapes such as angles, tees, and channels.
ASTM A484	This specification includes wrought stainless steel bars, shapes, forgings, and billets or other semi-finished materials, except wire, for forging. The materials are available in four types of conditions.
ASTM A582	This specification includes cold or hot finished bars, which are suitable for machining processes. This specification includes rounds, squares, and hexagons, from common types of stainless free-machining steels.
ASTM B473	This specification includes nickel alloy bar & wire, which can be produced in a solution-annealed condition, stabilized-annealed condition, or annealed condition.

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