4340 alloy steel round bar suppliers

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HR 4340 alloy steel bar	SAE 4340 Alloy Round Bar	AISI 4340 Steel Bar

HR 4340 alloy steel bar Specification
Hot Rolled 4340 Bar price
4340 hr alloy bar sizes
SAE 4340 Alloy Round Bar properties
AISI 4340 Steel Bar Stock

AISI 4340/JIS SNCM439 Alloy Steel Bar

Reliant Pipe (Iso Certified ) Alloy Steel 4340 Bar Suppliers in India, Check 4340 Round Bar Price List India, aisi 4340 hr ht bar Stockist in Mumbai, Bengaluru, Chennai, USA, UK, Houston, Dubai, Seoul, Hyderabad, Abu Dhabi, canada, singapore, Ahmedabad, Tehran, south africa, houston, Riyadh, Vadodara, London, Coimbatore, Jakarta, Istanbul, Bangkok, Kuwait City, uae. 4340 alloy steel round bar is a nickel-chromium-molybdenum alloy steel known for its toughness and its ability to attain high strengths in the heat-treated condition. It has very good fatigue resistance.

4340 alloy steel bar is used heavily in the aerospace industry due to its ultra-high strength. When heat treated it is known for its toughness while preserving good fatigue strength. For highly stressed parts it is excellent choice. It can be machined by all customary methods. This material is available in both vacuum melt (VM) and air melt (AM).

HR 4340 alloy steel bar Specification

Steel Round Bar type	AISI 4340 Alloy Steel Round Bars Die Steel Bar
Standards	ASTM A689, JIS G4801, DIN 17221, GB/T 18254, ASTM A295, JIS G4805, etc.
Spring steel	65Mn, 1566, 60Si2Mn, 9260, etc.
Bearing steel	GCr15, SAE52100, GCr15SiMn, 100CrMnSi6-4, SJU2, etc.
Cold heading steel	ML25, ML35, etc.
Alloy structural steel	40CrNiMo, SAE4330, 42CrMo, 15Cr2Ni2, 40CrNi2Mo, 35CrMoV, 12Cr1MoV, ASTM4130, SCM420, 40CrV, etc.
Military steel	20Cr2Ni4A, 18Cr2Ni4WA, 23CrNiMo7-4-7, etc.
AISI 4340 Alloy Steel Round Bars Range	Range – 3.17mm to 350mm dia
AISI 4340 Alloy Steel Round Bars Diameter	5mm-500mm (Customized size is acceptable)
AISI 4340 Alloy Steel Round Bars Length	1m-9m or according to the customer’s requirement.
AISI 4340 Alloy Steel Round Bars Type	Round bar, rod, square bar, flat bar, hexagon bar, angle bar, channel bar, threaded bar
AISI 4340 Alloy Steel Round Bars Technique	Forged/Hot Rolled/Cold Drawn/Peeled
AISI 4340 Alloy Steel Round Bars Surface	bright round bar, pickled round bar, black round bar
Other processing service	Hot dipped Galvanized, pre-galvanized, Color painting,coated, cutting, bending,punching
Package Details	Standard seaworthy package(wooden boxes package, pvc package, or other package)
Export Area	USA, UAE, Europe, Asia, Middle East, Africa, South America

SHAPE	POUNDS PER FOOT
Round	D2 x 2.67
Hexagon	D2 x 2.945
Square	D2 x 3.4
Flat	Thickness (in.) x Width (in.) x 3.4

AISI 4340 alloy steel round bar Similar Grades

Standard: GB/AISI/JIS
Grade: 40CrNiMoA/4340/SNCM439

AISI 4340 alloy steel round bar Available Size

Hot rolled round bar: dia16mm-dia310mm
Hot rolled flat bar: thickness5mm-30mm, width50mm-130mm
Hot rolled square bar: 16mm*16mm-100mm*100mm
Forged steel round bar: dia100mm-dia1500mm
Forged flat bar: thickness20mm-400mm, width80mm-1000mm
Forged steel block: 100mm*100mm-1000mm*1000mm
Cold drawn round bar: dia4mm-dia100mm

Heat Treatment

Annealing/Normalizing/Hardening/Tempering/Quenching

Annealing: AISI 4340 round bar alloy steel is annealed at 844°C (1550°F) followed by cooling the furnace.
Tempering: AISI 4340 round bar alloy steel should be in the heat treated or normalized and heat treated condition before tempering. Tempering temperatures depend upon the desired strength level.
Hardening: AISI 4340 round bar alloy steel can be hardened by cold working or heat treatment.

AISI 4340 Steel Bar Equivalent Grades

Country	USA	German	British	Japan	China	Australia
Standard	ASTM A29	DIN 17200	BS 970	JIS G4105	GB/T 3077	AS 1444
Grades	4340	1.7225/ 42crmo4	42CrMo4	SCM440	42CrMo	4340

We Keep Bulk Stock of Alloy Steel AISI 4340 Round Bar, SAE 4340 Round Bars, AISI 4340 Alloy Steel Round Bars, AISI 4340 Rods, SAE 4340 Rods in various sizes and wall thickness

AISI 4340 Steel Bar Stock


4340 round bar	aisi 4340 flat bar	sae 4340 steel hex bar

4340 rod	4340 bright bar	4340 black bar

4340 cold drawn bar	4340 annealed bar	4340 hollow bar

4340 forged bar	AISI / SAE 4340 Threaded Bar	AISI / SAE 4340 Square Bar

Alloy Steel AISI 4340 Extruded Round Bar	Alloy Steel AISI 4340 Turned Round Bars	Alloy Steel AISI 4340 Peeled Round Bars

Alloy Steel AISI 4340 Polished Round Bars	Alloy Steel AISI 4340 Smooth turned Round Bars	Alloy Steel AISI 4340 Hot rolled Round bar

Other Types of 4340 hr steel bar

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Hot Rolled 4340 Bar price in india

4340 steel price per kg
US $800-1000 / Metric Ton
AISI 4340 Round Bar price per kg
INR : Rs 65 Per Kg
Sae 4340 Flat Bars price per kg
INR : Rs 100 Per Kg
AISI 4340 Steel Plate - 3 To 500 Mm
INR : Rs 120 Per Kg
42crmo Aisi 4340 Alloy Steel Round Bar Per Kg
US $200-1000 / Metric Ton
sae 4340 steel price,aisi 4340 steel,4340 steel price per kg
US $0.8-1.2 / Kilogram
Hot Rolled Peeled Steel Round Bars AISI 4340 steel price per kg
US $890.0-900.0 / Tons
4340 4340 ck67 alloy steel plate price per kg
US $600-800 / Ton
aisi 4340 stainless steel round bar price per kg with bright surface
US $868-2586 / Ton
4340 Plate Steel,4340 Alloy Steel,4340 Steel Price Per KG
US $800-1500 / Ton
sae 4340 alloy steel bar price per kg
US $500-1600 / Ton

4340 alloy bar Manufacturer, 4340 annealed bar stockist, 4340 steel flat bar, 4340 rectangular bar, 4340 hollow bar, 4340 steel hollow bar Exporter, check 4340 round bar price

SAE 4340 Alloy Round Bar Properties

alloy 4340 bar Chemical Composition

Standard	Grade	C	Mn	P	S	Si	Ni	Cr	Mo
ASTM A29	4140	0.38-0.43	0.75-1.00	0.035	0.040	0.15-0.35	–	0.8-1.10	0.15-0.25
EN 10250	42CrMo4/ 1.7224	0.38-0.45	0.6-0.9	0.035	0.035	0.4	–	0.9-1.2	0.15-0.30
JIS G4105	SCM440	0.38-0.43	0.60-0.85	0.03	0.03	0.15-0.35	–	0.9-1.2	0.15-0.30

HR 4340 steel bar Mechanical Properties

Density: 7.85 g/cm^3
Melting Range:1340-1380°C
Specific Heat Capacity:448 J/kg*K
Electrical Resistivity:1.09 µΩ.m
Coefficient of Thermal
Expansion from -18-93°C:11.3 µm/mm/°C
Coefficient of Thermal Expansion from -18-649°C:14.6 µm/mm/°C

ROOM TEMPERATURE MECHANICAL & PHYSICAL PROPERTIES AT VARIOUS TEMPERING TEMPERATURE (NORMALISED AT 899-927 °C/AUSTENITISED AT 816-829°C/OIL QUENCHED)	204°C	260°C	316°C	427°C	538°C	593°C	649°C
Ultimate Tensile Strength /MPa	1905	1830				1140
0.2% Yield Strength /MPa	1530	1530				1035
Reduction of area %	35	25				60
Elongation %	11	8				18
Room Temperature Hardness/ Rockwell C at Various Tempering Temperature (Austenitised at 843°C/Oil Quenched/Tempered Twice for 2+2 Hours)	52		47	41	35		25

MECHANICAL & PHYSICAL PROPERTIES	21.1°C	100°C	204.4°C	315.6°C	400°C	537.8°C	648.9°C	700°C	760°C	815°C	870°C	982°C
Ultimate Tensile Strength /MPa	792	-	-	-	-	726	473	-	286	-	139	66
0.2% Yield Strength /MPa	407	-	-	-	-	363	275	-	152	-	68	31
Reduction of area %	-	-	-	-	-	-	-	-	-	-	-	-
Elongation %	31	-	-	-	-	27	32	-	75	-	90	91
1,000 hr Rupture Strength	-	-	-	-	-	-	83	47	26	15	8.3	-
Coefficient of Thermal Expansion /µm/m°C **	-	11	12.7	13.4	13.9	14.3	15	15.4	-	16.5	17.1	18.2
Thermal Conductivity /kcal/(hr.m.°C) **	10.06	-	-	-	-	-	-	-	-	-	-	-
Modulus of Elasticity / GPa	221	216	210	203	197	190	181	173	-	165	153	140

HARDNESS/ ROCKWELL C AT VARIOUS TESTING TEMPERATURE	21 °C	93°C	204°C	316°C	427°C	538°C
Condition A: Normalised at 899 °C for 1 hour + air cool/ Austenitised at 816 °C for 0.5 hour + oil quench/ Tempered at 246 °C for 2+2 hours +air cool	49	48.5	48	45.5	35	18
Condition B: Normalised at 899 °C for 1 hour + air cool/ Austenitised at 816 °C for 0.5 hour + oil quench/ Tempered at 482 °C for 2+2 hours +air cool	40.5	38	36.5	34	31.5	18
Condition C: Normalised at 899 °C for 1 hour + air cool/ Austenitised at 802 °C for 0.5 hour + oil quench/ Tempered at 593 °C for 2 hours +air cool	34	32.5	30	27.5	24	13

Aircraft Quality 4340 per 6359 Hot Rolled Bar

SAE 4340 Chromoly steel is ideal for parts requiring critical harden-ability and high strength metal. For example, gears and aircraft parts which operate under highly stressed, severe conditions perform exceptionally when made from 4340 AQ metal. The term Aircraft Quality (AQ) steel means it is suitable for the manufacturing of aircraft parts which are subject to magnetic particle inspection after machining.

AMS 6359 - AISI 4340 (E4340) Aircraft Quality Steel Plate Size Table

SIZE INCHES	WGT./ SQ.FT.	18" x 72" ANNEALED	36" x 72" ANNEALED	72" x 144" ANNEALED
0.190	7.945	HR	HR	HR
1/4	10.20	HR	HR	HR
5/16	12.75	HR	HR	HR
3/8	15.30	HR	HR	HR
1/2	20.40	HR	HR	HR
5/8	25.50	HR	HR	HR
3/4	30.60	HR	HR	HR
7/8	35.70	HR	HR	HR
1	40.80	HR	HR	HR
1 1/4	51.00	HR	HR	HR
1 1/2	61.20	HR	HR	HR
1 3/4	71.40	HR	HR	HR
2	81.60	HR	HR	HR
2 1/2	102.00	HR	HR	HR
3	122.40	HR	HR	HR
3 1/2	142.80	HR	HR	HR
4	163.20	HR	HR	HR
4 1/2	183.50	HR	HR	HR
5	204.00	HR	HR	HR
6	244.83	HR	HR	HR

Material may also meet specs ASTM-A829, AMS-2301, EN10204.

alloy steel aisi 4340 bar weight chart per linear foot

SIZE IN INCHES	ROUND	SQUARE	OCTAGON	HEXAGON	SIZE IN INCHES	ROUND	SQUARE	OCTAGON	HEXAGON
1/16	.010	.013	.011	.012	11/16	1.262	1.607	1.333	1.392
5/64	.017	.022	.018	.019	45/64	1.320	1.681	1.394	1.456
3/32	.023	.029	.024	.025	23/32	1.380	1.756	1.487	1.521
7/64	.031	.039	.033	.034	47/64	1.440	1.834	1.521	1.588
1/8	.042	.053	.044	.046	3/4	1.502	1.913	1.586	1.656
9/64	.053	.067	.056	.058	25/32	1.630	2.075	1.721	1.797
5/32	.065	.083	.069	.072	13/16	1.763	2.245	1.862	1.944
11/64	.079	.100	.083	.087	27/32	1.901	2.421	2.008	2.096
3/16	.094	.120	.099	.104	7/8	2.045	2.603	2.159	2.254
13/64	.110	.140	.116	.121	29/32	2.193	2.792	2.316	2.418
7/32	.128	.163	.135	.141	15/16	2.347	2.988	2.479	2.588
15/64	.147	.187	.155	.162	31/32	2.506	3.191	2.646	2.763
1/4	.167	.213	.176	.184	1	2.670	3.400	2.820	2.945
17/64	.188	.240	.199	.207	1-1/16	3.015	3.838	3.183	3.324
9/32	.211	.269	.223	.233	1-1/8	3.380	4.303	3.569	3.727
19/64	.235	.300	.248	.259	1-3/16	3.766	4.795	3.977	4.152
5/16	.261	.332	.275	.288	1-1/4	4.172	5.313	4.407	4.601
21/64	.288	.360	.304	.318	1-5/16	4.600	5.857	4.858	5.072
11/32	.316	.402	.334	.348	1-3/8	5.049	6.428	5.332	5.567
23/64	.345	.439	.364	.381	1-7/16	5.518	7.026	5.827	6.085
3/8	.376	.478	.397	.414	1-1/2	6.008	7.650	6.345	6.625
25/64	.408	.519	.431	.450	1-9/16	6.519	8.301	6.885	7.189
13/32	.441	.561	.466	.486	1-5/8	7.051	8.978	7.446	7.775
27/64	.475	.605	.502	.524	1-11/16	7.604	9.682	8.030	8.385
7/16	.511	.651	.540	.564	1-3/4	8.178	10.41	8.634	9.018
29/64	.548	.698	.579	.604	1-13/16	8.773	11.17	9.265	9.673
15/32	.587	.747	.620	.647	1-7/8	9.388	11.95	9.911	10.35
31/64	.627	.798	.662	.692	1-15/16	10.02	12.76	10.58	11.05
1/2	.668	.850	.705	.736	2	10.68	13.60	11.28	11.78
33/64	.710	.904	.750	.783	2-1/16	11.36	14.46	11.99	12.53
17/32	.754	.960	.796	.831	2-1/8	12.06	15.35	12.73	13.30
35/64	.799	1.017	.844	.881	2-3/16	12.78	16.27	13.49	14.09
9/16	.845	1.076	.892	.932	2-1/4	13.52	17.21	14.27	14.91
37/64	.893	1.136	.943	.985	2-5/16	14.28	18.18	15.08	15.75
19/32	.941	1.199	.994	1.038	2-3/8	15.06	19.18	15.91	16.61
39/64	.992	1.263	1.048	1.094	2-7/16	15.87	20.20	16.75	17.49
5/8	1.043	1.328	1.102	1.150	2-1/2	16.69	21.25	17.62	18.40
41/64	1.096	1.395	1.207	1.209	2-9/16	17.53	22.33	18.52	19.34
21/32	1.150	1.464	1.214	1.268	2-5/8	18.40	23.43	19.43	20.29
43/64	1.205	1.535	1.272	1.329	2-11/16	19.29	24.56	20.37	21.27

SIZE IN INCHES	ROUND	SQUARE	OCTAGON	HEXAGON	SIZE IN INCHES	ROUND	SQUARE	OCTAGON
2-3/4	20.19	25.71	21.33	22.27	6	96.13	122.4	101.5
2-3/16	21.12	26.90	22.31	23.29	6-1/16	98.15	125.0	103.6
2-7/8	22.07	28.10	23.31	24.34	6-1/8	100.2	127.6	105.8
2-5/16	23.04	29.34	24.33	25.41	6-3/16	102.2	130.2	108.0
3	24.03	30.60	25.38	26.50	6-1/4	104.3	132.8	110.2
3-1/16	25.05	31.89	26.45	27.62	6-5/16	106.4	135.5	112.4
3-1/8	26.08	33.20	27.54	28.76	6-3/8	108.5	138.2	114.6
3-3/16	27.13	34.55	28.65	29.92	6-7/16	110.7	140.9	116.9
3-1/4	28.21	35.91	29.79		6-1/2	112.8	143.7	119.1
3-5/16	29.30	37.21	30.94		6-9/16	115.0	146.4	121.4
3-3/8	30.42	38.73	32.12		6-5/8	117.2	149.2	123.8
3-7/16	31.55	40.18	33.32		6-11/16	119.4	152.1	126.1
3-1/2	32.71	41.6	34.54		6-3/4	121.7	154.9	128.5
3-9/16	33.90	43.15	35.79		6-13/16	123.9	157.8	130.9
3-5/8	35.09	44.68	37.07		6-7/8	126.2	160.7	133.3
3-1/16	36.31	46.23	38.34		6-15/16	128.5	163.6	135.7
3-3/4	37.55	47.81	39.65		7	130.9	166.6	138.2
3-3/16	38.81	49.42	40.99		7-1/16	133.2	169.6	140.7
3-7/8	40.10	51.05	42.34		7-1/8	135.6	172.6	143.2
3-5/16	41.40	52.71	43.72		7-3/16	138.0	175.6	145.7
4	42.73	54.40	45.12		7-1/4	140.4	178.7	148.2
4-1/16	44.07	56.11	46.54		7-5/16	142.8	181.8	150.8
4-1/8	45.44	57.85	47.98		7-3/8	145.2	184.9	153.4
4-3/16	46.83	59.62	49.45		7-7/16	147.7	188.1	156.0
4-1/4	48.23	61.41	50.93		7-1/2	150.2	191.3	158.6
4-5/16	49.66	63.23	52.44		7-5/8	155.3	197.7	164.0
4-3/8	51.11	65.08	53.98		7-3/4	160.4	204.2	169.4
4-7/16	52.58	66.95	55.53		7-7/8	165.6	210.9	174.9
4-1/2	54.08	68.85	57.10		8	170.9	217.6	180.5
4-9/16	55.59	70.78	58.70		8-1/4	181.8	230.9	192.0
4-5/8	57.12	72.73	60.32		8-1/2	192.9	245.7	203.8
4-1/16	58.68	74.71	61.96		8-3/4	204.4	259.6	215.8
4-3/4	60.25	76.71	63.63		9	216.3	275.4	228.4
4-3/16	61.85	78.75	65.32		10	267.0	340.0	282.0
4-7/8	63.46	80.80	67.02		11	323.1	411.4	341.2
4-5/16	65.10	82.89	68.75		12	384.4	489.6	406.1
5	66.76	85.00	70.50		13	451	575	476
5-1/16	68.44	87.14	72.27		14	523	666	552
5-1/8	70.14	89.30	74.07		15	601	765	634
5-3/16	71.86	91.50	75.89		16	684	871	721
5-1/4	73.60	93.71	77.72		17	772	982	814
5-5/16	75.36	95.96	79.59		18	865	1102	912
5-3/8	77.15	98.23	81.47		19	964	1227	1017
5-7/16	78.95	100.5	83.38		20	1068	1360	1127
5-1/2	80.78	102.9	85.30		21	1177	1499	1242
5-9/16	82.62	105.2	87.25		22	1292	1645	1363
5-5/8	84.49	107.6	89.23		23	1412	1798	1490
5-1/16	86.38	110.0	91.22		24	1538	1958	1622
5-3/4	88.29	112.4	9323		25	1669	2125	1760
5-3/16	90.22	114.9	95.27		26	1805	2298	1904
5-7/8	92.17	117.4	97.33		27	1946	2478	2053
5-5/16	94.14	119.9	99.41		28	2093	2665	2208

4340 hr alloy bar sizes

Title	Type/Filesize
4140 W-Nr 1.7225, AS 4140, BS EN19A, AISI 4140 Cr Mo steel for applications requiring high tensile strength and toughness values, in particular in medium and large cross sections in the quenched and tempered condition.	Size Range: Rd 10mm - 650mm, Hollow 45/28 - 200/140mm, Hex 19 - 75mm A/F Sq 28mm - 127mm Fl 76.2x38.1mm Chrome Bar 19.05mm - 101.6mm Ground 12.7mm - 110mm (H9 Toll) Peeled & Polished 19.05mm - 101.6mm (H11 Toll). Other size available on request
709M W-Nr 1.7225, AS 4140, BS EN19A, AISI 4140 When compared to other 4140 steels ASSAB 709M has guaranteed superior machinability characteristics in all sizes.	Size Range: Rd 16mm - 250mm Other sizes available on request.
4340 W-Nr 1.6565, AS 4340, BS ~EN24, AISI 4340 Ni Cr Mo steel for applications requiring high tensile strength and toughness values, particularly in large cross sections in the quenched and tempered condition.	Size Range: Rd 17mm-460mm Other sizes available on request.
EN-25 W-Nr 1.6743, AS X9931, BS EN25 21/2% Ni Cr Mo alloy steel with increased strength due to the Ni content. Supplied in the hardened and tempered condition.	Size Range: Rd 7.94mm- 260mm Sq 300mm Other sizes available on request.
EN26 W-Nr 1.6745, AS X9940, BS 970 826 M 40 21/2% Ni Cr Mo alloy steel with higher C content. Supplied in the hardened and tempered condition. Higher strength than EN25.	Size Range: Rd 25mm - 300mm Other sizes available on request.
4145H AISI 4145H Mod.API Spec.7 45% C Cr Mo alloyed steel normally used in oil field applications.	Size Range: Rd 90mm - 280mm Hollow 180/57.15 - 254/76.2 Other sizes available on request

Title

Type/Filesize

4140

W-Nr 1.7225, AS 4140, BS EN19A, AISI 4140
Cr Mo steel for applications requiring high tensile strength and toughness values, in particular in medium and large cross sections in the quenched and tempered condition.

Size Range:

Rd 10mm - 650mm, Hollow 45/28 - 200/140mm,
Hex 19 - 75mm A/F
Sq 28mm - 127mm
Fl 76.2x38.1mm
Chrome Bar 19.05mm - 101.6mm
Ground 12.7mm - 110mm (H9 Toll)
Peeled & Polished 19.05mm - 101.6mm (H11 Toll).

Other size available on request

709M

W-Nr 1.7225, AS 4140, BS EN19A, AISI 4140
When compared to other 4140 steels ASSAB 709M has guaranteed superior machinability characteristics in all sizes.

Size Range:
Rd 16mm - 250mm

Other sizes available on request.

4340

W-Nr 1.6565, AS 4340, BS ~EN24, AISI 4340
Ni Cr Mo steel for applications requiring high tensile strength and toughness values, particularly in large cross sections in the quenched and tempered condition.

Size Range:
Rd 17mm-460mm

Other sizes available on request.

EN-25

W-Nr 1.6743, AS X9931, BS EN25
21/2% Ni Cr Mo alloy steel with increased strength due to the Ni content. Supplied in the hardened and tempered condition.

Size Range:
Rd 7.94mm- 260mm
Sq 300mm

Other sizes available on request.

EN26

W-Nr 1.6745, AS X9940, BS 970 826 M 40
21/2% Ni Cr Mo alloy steel with higher C content. Supplied in the hardened and tempered condition. Higher strength than EN25.

Size Range:
Rd 25mm - 300mm

Other sizes available on request.

4145H

AISI 4145H Mod.API Spec.7
45% C Cr Mo alloyed steel normally used in oil field applications.

Size Range:
Rd 90mm - 280mm
Hollow 180/57.15 - 254/76.2

Other sizes available on request

alloy steel aisi 4340 round bar tolerances

alloy steel aisi 4140 round bar tolerances

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alloy steel aisi 4340 round bar weight formula

Round Bar Weight Calculation Formula
Round Bar Weight Formula 0.00623 X ( mm ) Diam X ( mm ) Diam = Weight / Meter 0.0019 X ( mm ) Diam X ( mm ) Diam = Weight / Feet	Square Bar Weight Formula 0.00788 X ( mm ) Diam X ( mm ) Diam = Weight / Meter 0.00240 X ( mm ) Diam X ( mm ) Diam = Weight / Feet
Hexagonal Bar Weight Forumla 0.00680 X ( mm ) Diam X ( mm ) Diam = Weight / Meter 0.002072 X ( mm ) Width X ( mm ) Diam = Weight / Feet	Flat Bar Weight Forumla 0.00798 X ( mm ) Thickness X ( mm ) Width = Weight / Meter 0.00243 X ( mm ) Width X ( mm ) Thickness = Weight / Feet