Stainless Steel 430 Square Bars Supplier, UNS S43000 Square Bars Exporter

GENERAL PROPERTIES:-

Grade 430 is a ferritic, straight chromium, non-hardenable grade, combining good corrosion resistance and formability characteristics with useful mechanical properties. Its ability to resist nitric acid attack permits its use in specific chemical applications but automotive trim and appliance components represents its largest fields of application.

Grade 430F is the free-machining version of this grade, available in bar form for use in automatic screw machines. Grade 434 is the molybdenum bearing version of Grade 430 and has the same useful combination of properties. Its molybdenum addition improves corrosion resistance.

These properties for 430 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 forgings and bar in their respective specifications. Properties of Grade 430F are specified for bar in ASTM A582.

APPLICATIONS:-

Typical applications for 430 grade include:

• Linings for dish washers
• Refrigerator cabinet panels
• Automotive trim
• Lashing Wire
• Element Supports
• Stove trim rings
• Fasteners
• Chimney Liners

Typical applications for 430F grade include:

• Repetition machined components

CORROSION RESISTANCE:-

Grade 430 has good resistance to a wide variety of corrosive enviornments, including nitric acid and some organic acids. It attains its maximum corrosion resistance when in the highly polished or buffed condition. In general its resistance to pitting and crevice corrosion resistance is close to that of grade 304. Stress corrosion cracking resistance of Grade 430 is very high, as it is for all ferritic grades.

Like other high-sulphur free machining grades 430F has much reduced resistance to pitting and crevice corrosion compared to its non-free machining equivalent.

HEAT TREATMENT:-

• Solution Annealing – Heat to 815-845°C, hold for ½ hour per 25mm of thickness, slow furnace cool to 600°C and then quickly air cool. Slow cooling from 540-400°C will cause embrittlement.
• Sub-Critical anneal – Heat to 760-815°C and then air cool or water quench.
• This grade is not hardenable by thermal treatment.

WELDING:-

• Pre-heat at 150-200°C if welding is necessary.
• Embrittlement in the weld metal and heat affected zone can be relieved by a post-weld anneal at 790-815°C
• Grain refinement will not occur.

MACHINING:-

• Easier to machine than the standard austenitic grades such as 304.
• Still a tendency for galling and pick-up on the cutting tool.
• Bars that have been lightly drawn are easier to machine than those in the annealed condition.
• Grade 430F, the free machining version of 430, is very much easier to machine.

FABRICATION:-

• Lower work hardening rate makes bending and forming somewhat easier than for grade 304
• Lower ductility restricts very severe operations.
• Severe bends should be made with the bend axis at right angles to the rolling direction.
• Severe cold heading of 430 wire is possible.

COMPOSITION:-

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N
430	min. max.	- 0.12	- 1.00	- 1.00	- 0.040	- 0.030	16.0 18.0	-	- 0.75	-
430F	min. max.	- 0.12	- 1.25	- 1.00	- 0.06	0.15-	16.0 18.0	-	-	-

MECHANICAL PROPERTIES:-

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
430	450	205	22	89	183
430F	552 typical	379 typical	25 typical	-	262

PHYSICAL PROPERTIES:-

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
430	7750	200	10.4	11.0	11.4	23.9	26.0	460	600
430F	7750	200	10.4	11.0	11.4	26.1	26.3	460	600

POSSIBLE ALTERNATIVE GRADES:-

In the table below are a list of possible alternative grades to Grade 430.

Grade	Reason it may be chosen instead of 430
430F	Higher machinability than 430 is needed in bar product, and reduced corrosion resistance is acceptable.
434	Better pitting resistance is required
304	Slightly higher corrosion resistance is needed, together with greatly improved ability to be welded and cold formed
316	Much better corrosion resistance is needed, together with greatly improved ability to be welded and cold formed
3CR12	A lower corrosion resistance is acceptable in a cost-critical application

Stainless Steel Pipe Fittings and Flanges
Manufacture	Stainless steel Welded and Seamless pipe fittings
Size Range	DN6 - DN600
Grades	202, ASTM A312 in 304/304L and 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
Wall Thickness	Sch 10S, 40S, 80S
Type	Stainless steel Butt weld, Screwed & socket, Flanges
Shapes	Stainless steel Elbows, Tees, Reducers, Caps, Stub ends, Flanges (ANSI, Table E & Table D)

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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