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brass tube sizes

author:MF manufacturerstime:2022-03-08 17:58:08

brass tube sizes(brass tube sizes)

The unit of measure for calculating the theoretical weight of steel is kilograms(kg)。Its basic formula is:W(weight,kg) = F(sectional areamm2)× L(length,m)×ρ(density,g/cm3)× 1/1000

(brass tube sizes)The density of steel is:7.85g/cm3,The formula for calculating the theoretical weight of various steels is as follows:


Calculation formula

symbolic meaning

Calculation example

round steel Wire rod(kg/m)



diameter100mmthe round steel,ask for eachmweight。




d=Section diametermm

The section diameter is12mmrebar,ask for eachmweight。

Everymweight=0.00617 ×12 2=0.89kg

(brass tube sizes)square steel(kg/m)


a=side widthmm

side width20mmsquare steel,ask for eachmweight。


flat steel(kg/m)


b=side widthmm

(brass tube sizes)d=thickmm

side width40mm,thick5mmflat steel,ask for eachmweight。


Hexagonal Steel(kg/m)


s=opposite side distancemm

opposite side distance50mmhexagonal steel,ask for eachmweight。


Octagonal Steel(kg/m)


s=opposite side distancemm

opposite side distance80mmoctagonal steel,ask for eachmweight。


Equilateral angle steel(kg/m)

=0.00785×[d (2b–d)+ 0.215(R2–2r2)]

b=side width

(brass tube sizes)d=edge thickness

R=Inner arc radius

r=End arc radius

beg20mm×4mmEach equilateral angle steelmweight。

(brass tube sizes)from the catalogue of metallurgical products4mm×20mmequilateral angle steelRfor3.5,rfor1.2,then everymweight=0.00785×[4×(2×20–4)+0.215×(3.52–2×1.2 2 )]=1.15kg

Unequal angle steel(kg/m)

W= 0.00785×[d(B+b–d )+0.215(R2–2r2)]

B=Long side width

b=Short side width

(brass tube sizes)d=edge thickness

(brass tube sizes)R=Inner arc radius

r=End arc radius

beg30mm×20mm×4mmEach unequal angle steelmweight。

from the catalogue of metallurgical products30×20×4unequal angle steelRfor3.5,rfor1.2,then everymweight=0.00785×[4×(30+20–4)+0.215×(3.52–2×1.2 2 )]=1.46kg

Channel steel

(brass tube sizes)(kg/m)


W=0.00785×[hd+2t(b–d)+0.349(R–r 2)]

(brass tube sizes)h=high

b=leg length

d=waist thick

t=average leg thickness

(brass tube sizes)R=Inner arc radius

r=End arc radius

beg80mm×43mm×5mmof channel steel permweight。

Find the channel steel from the catalogue of metallurgical productstfor8 ,Rfor8,rfor4,

then everymweight=0.00785×[80×5+2×8×(43–5)+0.349×(82–4 2)]=8.04kg


W=0.00785×[hd+2t(b–d )+0.615(R2–r2)]


b=leg length

d=waist thick

t=average leg thickness

(brass tube sizes)R=Inner arc radius

r=End arc radius

beg250mm×118mm×10mmof I-beam permweight。

(brass tube sizes)Find this I-beam from the Metal Materials Handbooktfor13,Rfor10,rfor5,

then everymweight=0.00785×[250×10+2×13×(118–10)+0.615×(102–5 2)]=42.03kg

steel plate(kg/m2)



thickness 4mm the steel plate,ask for eachm2 weight。

Everym2 weight=7.85 ×4=31.4kg

Steel Pipe(Including seamless steel pipe and welded steel pipe)kg/m


D=outer diameter

S=wall thickness

The outer diameter is60mmwall thickness4mmof seamless steel pipes,ask for eachmweight。

(brass tube sizes)Everymweight=0.02466×4×(60–4)=5.52kg

angle steel:weight per meter=0.00785*(side width+side width-edge thickness)*edge thickness

round steel:weight per meter=0.00617*diameter*diameter(Rebar and round steel are the same)

flat steel:weight per meter=0.00785*thickness*side width

pipe:weight per meter=0.02466*wall thickness*(outer diameter-wall thickness)

plate:weight per meter=7.85*thickness

brass tube:weight per meter=0.02670*wall thickness*(outer diameter-wall thickness)

Copper tube:weight per meter=0.02796*wall thickness*(outer diameter-wall thickness)

Aluminum checker plate:weight per square meter=2.96*thickness

Specific gravity of non-ferrous metals:copper plate8.9brass plate8.5Zinc plate7.2stereotype11.37

The calculation formula of non-ferrous metal sheet is:weight per square meter=proportion*thickness

How to calculate the weight of various specifications of rebar,Is there a standard?how many?

0.617is round10Rebar weight per meter。Rebar weight and diameter(radius)proportional to the square of。


weight per meter(Kg)=Diameter of rebar(mm)×Diameter of rebar(mm)×0.00617

In fact, it is also very simple to remember the weight of steel bars commonly used in construction projectsφ6=0.222 Kg φ6.5=0.26kg φ8=0.395kg φ10=0.617kg φ12=0.888kg Φ14=1.21kg Φ16=1.58kg Φ18=2.0kg Φ24=2.47kgΦ22=2.98kgΦ25=3.85kgΦ28=4.837kg............

Φ12(contains12)the following andΦ28(contains28)The steel bars are generally rounded to three digits after the decimal point,Φ14toΦ25Reinforcing bars generally take two digits after the decimal point









(brass tube sizes)Φ22=3Kg




(brass tube sizes)Φ36=7.99Kg


Simple formula for calculating theoretical weight of steel

flat steel、steel plate、steel belt W=0.00785×width×thick

square steel W=0.00785×side length2

round steel、wire、steel wire W=0.00617×diameter2

(brass tube sizes)Steel Pipe W=0.02466×wall thickness(outer diameter--wall thickness)

Equilateral angle steel W=0.00785×edge thickness(2side width--edge thickness)

Unequal angle steel W=0.00785×edge thickness(Long side width+Short side width--edge thickness)

I-beam W=0.00785×waist thick[high+f(leg width-waist thick)]

(brass tube sizes)Channel steel W=0.00785×waist thick[high+e(leg width-waist thick)]

prepare Note

(brass tube sizes)1、angle steel、The exact calculation formula of I-beam and channel steel is very complicated,Tabular form is used to calculate approximate values。

2、fvalue:General model and beltafor3.34,beltbfor2.65,beltcfor2.26。

3、evalue:General model and beltafor3.26,beltbfor2.44,beltcfor2.24。

4、All lengths are in millimeters

one、Steel length dimension

The steel length dimension is the most basic dimension of all kinds of steel,refers to the length of the steel、width、high、diameter、radius、the inside diameter of、Lengths such as outer diameter and wall thickness。The legal unit of measurement for the length of steel is meters(m)、centimeter(cm)、mm(mm)。in current practice,also useful inches(″)indicated,but it is not a legal unit of measurement。

1.Range of steel

It is an effective measure to save material。The fixed scale is the length or the length times the width is not less than a certain size,or length、Delivery within the size range of length by width。The production unit can produce and supply according to this size requirement。

2.indeterminate length(usual length)

Where product size(length or width),within the scope of the standard,Those that do not require a fixed size are called indeterminate feet。Indefinite length is also called normal length(full length)。Metal materials delivered to length,As long as the delivery is within the specified length。E.g,no greater than25mmof ordinary round steel,Its usual length is specified as4-10m, Then the round steel with the length within this range can be delivered。

(brass tube sizes)3.Fixed length

Cut to a fixed size according to the order requirements is called a fixed length。When delivered in fixed length,The delivered metal material must have the length specified by the buyer in the order contract。E.g,According to the length of the contract 5m delivery,then the delivered materials must be5mlong,shorter than5mor longer than5mare unqualified。But in reality the delivery can't be all5m long,Therefore, it is stipulated that a positive deviation is allowed,without allowing negative bias。

4.double ruler

According to the fixed size required by the order, it is called a double ruler。When delivered in multiple lengths,The length of the delivered metal material must be the length specified by the buyer in the order contract(single ruler)integer multiple of(additional saw)。E.g,The purchaser requires in the order contract the length of a single ruler to be 2m ,So,When cut into double rulers, the length is4m,cut into3When the ruler is doubled, it is6m,and add one or two kerfs respectively。The amount of sawing is specified in the standard。When delivered with a double ruler,Only positive deviations are allowed,Negative bias is not allowed。

5.short ruler

The length is less than the lower limit of the indeterminate length specified by the standard,But not less than the shortest allowed length is called short ruler。E.g,water、Provisions in the standard for gas transmission steel pipes,Allow each batch to have10%of(Calculate by root)2-4mlong short steel pipe。4mis the lower limit of the indeterminate length,The minimum length allowed is2m。

6.narrow ruler

The width is less than the lower limit of the indeterminate width specified by the standard,But not less than the narrowest allowed width is called narrow ruler。 When delivered with narrow feet,Attention must be paid to the narrow scale and the narrowest scale specified by the relevant standards。

two、Example of Steel Length Dimensions

1.Length dimension of section steel

⑴The standard lengths of the train tracks are12.5mand25mtwo。

(brass tube sizes)⑵round steel、wire、wire size by diameter d mm(mm)Number calibration。

⑶Square steel size by side lengthamm(mm)Number calibration。

(brass tube sizes)⑷Hexagonal Steel、Octagonal steel dimensions in distance from side to sidesmm(mm)Number calibration。

(brass tube sizes)⑸The dimensions of flat steel are in widthband thicknessdmm(mm)Number calibration。

⑹I-beam、The size of channel steel is based on waist heighth、leg widthband waist thicknessdmm(mm)Number calibration。

(brass tube sizes)⑺The dimensions of equilateral angles are equal to the width of the sidesband edge thicknessdmm(mm)Number calibration。The size of the unequal angle steel is based on the side widthB、band edge thicknessdmm(mm)Number calibration。

⑻HThe dimensions of the section steel are based on the height of the webh、Flap widthband web thicknesst1、Foil thicknesst2mm(mm)Number calibration。

2.steel plate、Length dimension of steel strip

⑴Generally, the thickness of the steel plate d Millimeter(mm)Number calibration。And the steel belt is widthbThicknessdMillimeter(mm)Number calibration。

(brass tube sizes)⑵Single steel plate has a specified different sizes,Such as hot rolled steel sheets: 1mm Thick steel plate,Width600×length2000 mm ;650×2000 mm ;700×1420 mm ;750×1500 mm ;900×1800 mm ;1000×2000 mm Wait。

3.Length size of steel pipe

⑴Generally in the outer diameter of the steel pipeD、Inner diameter and wall thicknessSMillimeter(mm)Number calibration。

⑵Each steel pipe has a specified different sizes,Such as seamless steel pipe outer diameter50mmof,Wall thickness2.5-10mmof15kind;Or the same wall thickness5mmof,Outer diameter32-195mmof29kind。Another example is the welded steel pipe25mmWall thickness3.25mmOrdinary steel pipe and4mmThick steel pipe。

three、Steel weight

(brass tube sizes)1.Theoretical weight of steel

The theoretical weight of steel is the nominal size and density of steel.(Past called a proportion)The calculated weight is called theoretical weight。This is the length size of steel、The cross-sectional area and dimensions allow the deviations to be directly related。Allowed deviation due to steel in the manufacturing process,Therefore, the theoretical weight calculated by formula has a certain entry into the actual weight.,So just as an estimated reference。

2.The actual weight of the steel material is the actual weight of the steel.(Overweight)Weight,Actual weight。The actual weight is accurate than the theoretical weight。

3.Steel weight calculation method

⑴Gross weight Yes“net weight”Symmetry,Is the total weight of the total steel itself and packaging materials。Transport enterprises calculate shipping time by gross weight。But steel purchase is calculated according to net weight。

⑵net weight Yes“Gross weight”Symmetry。Steel gross weight reduction weight after weight of the packaging material,Actual weight,Net weight。Generally consolidated in steel purchase and sale。

⑶Felt Steel packaging material weight,Be called skin weight。

⑷Weight ton Power units used in calculating shipping costs by steel gross weight。Its legal metering unit is tonne(1000kg),Long ton(British weight unit1016.16kg)、Short ton(Multi-system weight unit907.18kg)。

⑸Chargeable Weight Also known as“Billing ton”or“Freight ton”。Steel weight of the transportation department charges shipping。Different transportation methods,Different computing standards and methods。Railway vehicle transportation,Generally, the carcoller is refunded as a billing weight.。Highway transportation is charged with the vehicle's load-bearing tonnage。railway、LTL,Then, a few kilograms of gross weight is the weight of the calculation.,Insufficient progress。