303 steel flat steel: easy-to-cut, corrosion-resistant processing profile

Select high-quality stainless steel, smooth surface, easy to process and weld

Standard: ASTM A276

Grade: 303 304 316 321 630 904L

Size: 2x20 to 25x150mm

product details

303 stainless steel flat bar

303 stainless steel flat bar is a solid, rectangular stainless steel bar from the austenitic stainless steel family. Its most notable characteristic is its excellent machinability. By adding sulfur or selenium to 304 stainless steel, 303 stainless steel's machinability is significantly improved, making it highly popular for parts requiring extensive machining.

Astm A240 201 ss 304 303 316 310s 409 304 316 2b Ba No

Features

Excellent Machinability: This is the most prominent feature of 303 stainless steel. The added sulfur forms manganese sulfide inclusions in the steel. These inclusions act as chip breakers during cutting, easily breaking the chips into smaller particles. This significantly reduces tool wear and improves machining efficiency.

Good Corrosion Resistance: Although some corrosion resistance is sacrificed to improve machinability, 303 stainless steel still possesses excellent corrosion resistance. It resists atmospheric corrosion and many weak acids and bases, but its corrosion resistance is not as strong as that of 304 and 316 stainless steels.

Easy Machining: Due to its easy-to-cut properties, 303 stainless steel is well-suited for mass production on equipment such as automatic lathes and CNC machines, enabling high-precision machining.

Non-Magnetic: In its solution state, 303 stainless steel is non-magnetic, but may develop slight magnetism after cold working.

Typical Applications：

Due to its easy machinability, 303 stainless steel flat bar is often used to manufacture various components requiring extensive machining:

Bolts, Nuts, and Shafts: Widely used in the manufacture of various standard and non-standard parts.

Valve Components and Fittings: Suitable for the manufacture of valves, fittings, and fittings used in various fluid control systems.

Automation Machinery Parts: Used as precision parts in various automated equipment and instruments.

Other Components Requiring Machining: Examples include bushings, pins, and various machined parts.

In short, if you need a flat material that combines the corrosion resistance of stainless steel with exceptional machinability, 303 stainless steel flat bar is an ideal choice.

Specifications of 303 Stainless Steel Flat Bar

Standard	ASTM A276, A484, A479, A580, A582, JIS G4303, JIS G4311,DIN 1654-5,DIN 17440,KS D3706,GB/T 1220
Material	201,202,205,XM-19 etc. 301,303,304,304L,304H,309S,310S,314,316,316L,316Ti,317,321,321H,329,330,348 etc. 409,410,416,420,430,430F,431,440, 2205,2507,S31803,2209,630,631,15-5PH,17-4PH,17-7PH,904L,F51,F55,253MA etc.
Surface	Pickled,Peeled,Black,Sand Blast,Bright,Mill,Mirror,Hairline etc
Technology	Hot Rolled,Welded,Bend
Specifications	203mm -10010mm or as required
Tolerance	-0.02

Chemical composition of Stainless Steel Flat Bar

Austenite Ferrite Stainless Steel	329J1	0Cr26Ni5Mo2	<0.08	23.00-28.00	3.00-6.00	<1.50	<0.035	<0.030	1.00-3.00	<1.00	-	2)
	-	1Cr18Ni11Si4AlTi	0.10-0.18	17.50-19.50	10.–120..	<0.80	<0.035	<0.030	-	3.40-4.00	-	Al 0.10-0.30; Ti 0.40-0.70
	-	00Cr18Ni5MoSi2	<0.030	18.00-19.50	4.50-5.50	1.00-2.00	<0.035	<0.030	2.50-3.00	1.30-2.00	-	-
Ferrite Stainless Steel	405	0Cr13Al	<0.08	11.50-14.50	3)	<1.00	<0.035	<0.030	-	<1.00	-	Al 0.10-0.30
	410L	00Cr12	<0.030	11.00-13.00	3)	<1.00	<0.035	<0.030	-	<1.00	-	-
	430	1Cr17	<0.12	16.00-18.00	3)	<1.25	<0.035	<0.030	-	<0.75	-	-
	430F	Y1Cr17	<0.12	16.00-18.00	3)	<1.00	<0.035	<0.15	1)	<1.00	-	-
	434	1Cr17Mo	<0.12	16.00-18.00	3)	<1.00	<0.035	<0.030	0.75-1.25	<1.00	-	-
	447J1	00Cr30Mo2	<0.010	28.50-32.00	-	<0.40	<0.035	<0.030	1.50-2.50	<0.40	<0.015	-
	XM27	00Cr27Mo	<0.010	25.00-27.50	-	<0.40	<0.035	<0.030	0.75-1.50	<0.40	<0.015	-

Martensite stainless steel	403	1Cr12	<0.15	11.50-13.00	3)	<1.00	<0.035	<0.030	-	<0.50
	410	1Cr13	<0.15	11.50-13.50	3)	<1.00	<0.035	<0.030	-	<1.00
	405	0Cr13	<0.08	11.50-13.50	3)	<1.00	<0.035	<0.030	-	<1.00
	416	Y1Cr13	<0.15	12.00-14.00	3)	<1.25	<0.035	<0.15	1)	<1.00
	410J1	1Cr13Mo	<0.08-0.18	11.50-14.00	3)	<1.00	<0.035	<0.030	0.30-0.60	<0.60
	420J1	2Cr13	0.16-0.25	12.00-14.00	3)	<1.00	<0.035	<0.030	-	<1.00
	420J2	3Cr13	0.26-0.35	12.00-14.00	3)	<1.00	<0.035	<0.030	-	<1.00
	420F	Y3Cr13	0.26-0.40	12.00-14.00	3)	<1.25	<0.035	<0.15	1)	<1.00
	-	3Cr13Mo	0.28-0.35	12.00-14.00	3)	<1.00	<0.035	<0.030	0.50-1.00	<0.80
	-	4Cr13	0.36-0.45	12.00-14.00	-	-	-	-	-	-