MS Bright Bar | IS 2062 | ASTM A36

DIN 17100 St37 Round Bar Distributor, BS 970 Round Bar Exporter, EN 10277 Round Bar Stockist, MS Bright Round Bar Supplier, ASTM A108 MS Bright Round Bar Manufacturer.

PM Industries manufactures, supplies, and stocks MS Bright Bar in a range of sizes, profiles, and lengths. Bright bar is produced by cold drawing or cold finishing hot-rolled mild steel, which improves surface finish, tightens dimensional tolerances, and increases surface hardness slightly compared to the hot-rolled starting material. The result is a bar with a smooth, clean surface and accurate cross-section dimensions that hot-rolled bars can't match without additional machining.

ASTM A108 MS Bright Round Bar, MS Bright Round Bar, DIN 17100 St37 Round Bar, EN 10277 Round Bar.

That dimensional accuracy is the primary reason the bright bar gets specified over standard hot-rolled MS bar for machined components. Tighter tolerances mean less material removal during turning and milling, which reduces machining time, extends tooling life, and keeps per-part production costs lower in high-volume runs.

Machinability is the characteristic that makes bright bars the standard specification in screw machine shops, CNC turning centers, and precision fabrication environments. The consistent diameter, straight edges, and smooth surface allow workpieces to be chucked, fed, and machined with minimal setup variation between pieces. In high-volume production of shafts, pins, studs, fasteners, and precision turned components, that consistency directly affects output rate and part quality.

Surface finish quality matters in applications beyond machining. For visible components in furniture, architectural metalwork, and display structures, the clean surface of bright bar reduces the preparation work needed before painting, plating, or powder coating. Hot-rolled scale removal is already done, which simplifies the surface treatment process.

Corrosion protection follows the same approach as other mild steel products. MS bright bar will rust without surface treatment in outdoor or moist environments. The smooth cold-finished surface accepts paint, zinc plating, electroplating, and powder coating well. For indoor or dry service applications, the material performs without surface treatment for reasonable service periods.

Bar is available in round, square, hexagonal, and flat profiles across a range of sizes and lengths with standard mill certification. Custom cutting to length is available. Contact PM Industries for stock availability, profiles, dimensions, and pricing.

Specification MS Bright Bar

Specification	ASTM, EN, DIN, JIS, BS, ASME, AISI
Condition	Hardened & tempered, annealed
Length	1 to 6 Meters, Custom Cut Lengths
Round Bars	Outside Diameter in the range of 4mm to 500mm above as per the customer requirement.
Bright Bars	Outside Diameter in the range of 4mm to 500mm above as per the customer requirement.
Hex Bars	18mm – 57mm (11/16″ to 2-3/4″) above as per the requirement.
Square Bars	18mm – 47mm (11/16″ to 1-3/4″) above as per the requirement.
Flat Bars	1/2” to 10” in thickness range of 2mm to 150mm
Finish	Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish
Technique	Hot Rolled, Cold Rolled, Cold Drawn, Forged Round Bar, Rod
Tolerance	H8, H9, H10, H11, H12, H13, K9, K10, K11, K12 or as per clients’ requirements
Test Certificates	EN 10204/3.1B, NACE MR0103, NACE MR0175
Raw Materials Certificate	100% Radiography Test Report
Inspection	Third Party Inspection Report, etc

Available Types

Bright Bar Tolerance Chart

Section	Size, diameter or width across flats					Permitted Varations
Square and hexagon	>	6	18	+0	to	-0.090
	>	18	30	+0	to	-0.110
	>	30	50	+0	to	-0.130
	>	50	80	+0	to	-0.160
	>	80	105	+0	to	-0.250
Flat (thickness)	<	18	+0	to	-0.110
	>	18	30	+0	to	-0.130
	>	30	50	+0	to	-0.250
	>	50	80	+0	to	-0.350
Round	mm	mm
	>	6	18	+0	to	-0.070
	>	18	30	+0	to	-0.085
	>	30	50	+0	to	-0.100
	>	50	80	+0	to	-0.120
	>	80	100	+0	to	-0.140
Flat (width)	<	18	+0	to	-0.110
	>	18	30	+0	to	-0.130
	>	30	50	+0	to	-0.160
	>	50	80	+0	to	-0.190
	>	80	100	+0	to	-0.220
	>	100	130	+0	to	-0.350
	>	130	160	+0	to	-1.000
	>	160	320	+1.0	to	-1.000

Size

US Bar		Metric		Japanese		Canadian/ASTM
Diameter (Inch)	Size of Bar	Diameter (milimeter)	size of Bar	Diameter (milimeter)	size of Bar	Diameter (milimeter2)	size of Bar
0.375	#3	5.5	5.5	10	10	200	15M
0.25	#2	5	5	6	6	100	10M
0.625	#5	7	7	16	16	500	25M
0.5	#4	6	6	13	13	300	20M
0.875	#7	9	9	22	22	1000	35M
0.75	#6	8	8	19	19	700	30M
1.125	#9	11	11	29	29	2500	55M
1	#8	10	10	25	25	1500	45M
1.375	#11	14	14	35	35
1.25	#10	12	12	32	32
1.625	#13	18	18	41	41
1.5	#12	16	16	38	38
1.875	#15	22	22	48	48
1.75	#14	20	20	44	44
2.25	#18	28	28	57	57
2	#16	25	25	51	51
		36	36
		32	32
		44	44
		40	40
		50	50

Condition

ANN	Annealed
H&T	Hardened and tempered.
PH	Precipitation hardened.

Finish

Bright drawn	BD	Slit rolled edge	SRE
Cold drawn	CD	Polished	P
Peeled and turned	P&T	Rough turned/peeled	RT
Cold finished	CF	Hot rolled pickled and annealed	HRAP
Centreless ground	CG	Hot finished	HF
Smooth turned	ST	reeled and Peeled	PR

Available Stock

MS Bright Annealed Round Bar	DIN 17100 St37 Shafting Round Bar
ASTM A108 MS Bright Normalized Round Bar	BS 970 Automotive Round Bar
EN 10277 Quenched & Tempered Round Bar	JIS G3101 SS400 Aerospace Round Bar
DIN 17100 St37 Solution Annealed Round Bar	MS Bright Oil & Gas Round Bar
BS 970 Hardened Round Bar	ASTM A108 MS Bright Marine Round Bar
JIS G3101 SS400 Bright Round Bar	EN 10277 Medical Grade Round Bar
MS Bright Polished Round Bar	DIN 17100 St37 Hot Rolled Round Bar
ASTM A108 MS Bright Mirror Finish Round Bar	BS 970 Cold Drawn Round Bar
EN 10277 Pickled & Passivated Round Bar	JIS G3101 SS400 Cold Rolled Round Bar
DIN 17100 St37 Coated / Plated Round Bar	MS Bright Forged Round Bar
BS 970 Commercial Round Bar	ASTM A108 MS Bright Peeled Round Bar
JIS G3101 SS400 Precision Round Bar	EN 10277 Turned Round Bar
MS Bright Straight Length Round Bar	DIN 17100 St37 Ground Round Bar
ASTM A108 MS Bright Cut-to-Length Round Bar	BS 970 Centreless Ground Round Bar
EN 10277 Structural Round Bar	JIS G3101 SS400 Precision Ground Round Bar