Equal Angle Steel 70 × 70 × 8 mm — Size, Weight, Grades & Specification

Shandong Dayang Equal Angle Steel in 70 × 70 × 8 mm: theoretical weight 8.376 kg/m taken from GB/T 706-2016 Table A.3, plus the full standard size range, steel grades and international equivalents, tolerances, applications, and how a shipment is checked before it leaves.

Product Overview

Shandong Dayang Equal Angle Steel with two equal legs of 70 mm and a leg thickness of 8 mm weighs 8.376 kg per metre. It is an L-shaped open section with two equal legs, hot-rolled from continuously cast billet and supplied either black from the mill or hot-dip galvanized to EN ISO 1461.

The 70 mm size is used where a light, stiff member has to be bolted or welded into a frame: the two legs give a large welded perimeter for the weight, and the 90° corner stiffens the connection against rotation. Because both legs are 70 mm, the section is symmetric about its axis and can be set either way round without changing the design.

On this page you get the full engineering detail for this size: the theoretical weight read from the Chinese national standard table, the complete 等边角钢 size range with this size marked, dimensional behaviour, steel grades and their international equivalents, chemical composition, mechanical properties, applicable standards, typical applications, and the sourcing problems buyers run into on equal angle steel — with how we prevent each one.

Specifications & Size Range

All sizes in this family are listed below with this size in bold. Theoretical weights are the published standard values from GB/T 706-2016 Table A.3. Standard lengths: 6 m as standard; 9 m and 12 m on request; cut-to-length against a cutting list. Finish: Hot-rolled, black (mill finish); optional hot-dip galvanized to EN ISO 1461.

This size in context

Size (mm) Leg b / B (mm) Thickness d (mm) Area (cm²) Theoretical weight (kg/m) Weight per 6 m (kg)
70 × 70 × 5 mm 70 5 6.876 5.398 32.4
70 × 70 × 6 mm 70 6 8.16 6.406 38.4
70 × 70 × 7 mm 70 7 9.424 7.398 44.4
70 × 70 × 8 mm 70 8 10.67 8.376 50.3
75 × 75 × 5 mm 75 5 7.412 5.818 34.9
75 × 75 × 6 mm 75 6 8.797 6.906 41.4
75 × 75 × 7 mm 75 7 10.16 7.976 47.9

Full 等边角钢 table — all 115 sizes

Show the complete 等边角钢 size table (115 sizes)
Size (mm) Leg b / B (mm) Thickness d (mm) Area (cm²) Theoretical weight (kg/m) Weight per 6 m (kg)
20 × 20 × 3 mm 20 3 1.132 0.889 5.3
20 × 20 × 4 mm 20 4 1.459 1.145 6.9
25 × 25 × 3 mm 25 3 1.432 1.124 6.7
25 × 25 × 4 mm 25 4 1.859 1.459 8.8
30 × 30 × 3 mm 30 3 1.749 1.373 8.2
30 × 30 × 4 mm 30 4 2.276 1.787 10.7
36 × 36 × 3 mm 36 3 2.109 1.656 9.9
36 × 36 × 4 mm 36 4 2.756 2.163 13.0
36 × 36 × 5 mm 36 5 3.382 2.655 15.9
40 × 40 × 3 mm 40 3 2.359 1.852 11.1
40 × 40 × 4 mm 40 4 3.086 2.423 14.5
40 × 40 × 5 mm 40 5 3.792 2.977 17.9
45 × 45 × 3 mm 45 3 2.659 2.087 12.5
45 × 45 × 4 mm 45 4 3.486 2.737 16.4
45 × 45 × 5 mm 45 5 4.292 3.369 20.2
45 × 45 × 6 mm 45 6 5.077 3.985 23.9
50 × 50 × 3 mm 50 3 2.971 2.332 14.0
50 × 50 × 4 mm 50 4 3.897 3.059 18.4
50 × 50 × 5 mm 50 5 4.803 3.77 22.6
50 × 50 × 6 mm 50 6 5.688 4.465 26.8
56 × 56 × 3 mm 56 3 3.343 2.624 15.7
56 × 56 × 4 mm 56 4 4.39 3.446 20.7
56 × 56 × 5 mm 56 5 5.415 4.251 25.5
56 × 56 × 6 mm 56 6 6.42 5.04 30.2
56 × 56 × 7 mm 56 7 7.404 5.812 34.9
56 × 56 × 8 mm 56 8 8.367 6.568 39.4
60 × 60 × 5 mm 60 5 5.829 4.576 27.5
60 × 60 × 6 mm 60 6 6.914 5.427 32.6
60 × 60 × 7 mm 60 7 7.977 6.262 37.6
60 × 60 × 8 mm 60 8 9.02 7.081 42.5
63 × 63 × 4 mm 63 4 4.978 3.908 23.4
63 × 63 × 5 mm 63 5 6.143 4.822 28.9
63 × 63 × 6 mm 63 6 7.288 5.721 34.3
63 × 63 × 7 mm 63 7 8.412 6.603 39.6
63 × 63 × 8 mm 63 8 9.515 7.469 44.8
63 × 63 × 10 mm 63 10 11.66 9.153 54.9
70 × 70 × 4 mm 70 4 5.57 4.372 26.2
70 × 70 × 5 mm 70 5 6.876 5.398 32.4
70 × 70 × 6 mm 70 6 8.16 6.406 38.4
70 × 70 × 7 mm 70 7 9.424 7.398 44.4
70 × 70 × 8 mm 70 8 10.67 8.376 50.3
75 × 75 × 5 mm 75 5 7.412 5.818 34.9
75 × 75 × 6 mm 75 6 8.797 6.906 41.4
75 × 75 × 7 mm 75 7 10.16 7.976 47.9
75 × 75 × 8 mm 75 8 11.503 9.03 54.2
75 × 75 × 9 mm 75 9 12.83 10.072 60.4
75 × 75 × 10 mm 75 10 14.13 11.092 66.6
80 × 80 × 5 mm 80 5 7.912 6.211 37.3
80 × 80 × 6 mm 80 6 9.397 7.377 44.3
80 × 80 × 7 mm 80 7 10.86 8.525 51.2
80 × 80 × 8 mm 80 8 12.3 9.656 57.9
80 × 80 × 9 mm 80 9 13.73 10.778 64.7
80 × 80 × 10 mm 80 10 15.13 11.877 71.3
90 × 90 × 6 mm 90 6 10.64 8.352 50.1
90 × 90 × 7 mm 90 7 12.3 9.656 57.9
90 × 90 × 8 mm 90 8 13.94 10.943 65.7
90 × 90 × 9 mm 90 9 15.57 12.222 73.3
90 × 90 × 10 mm 90 10 17.17 13.478 80.9
90 × 90 × 12 mm 90 12 20.31 15.943 95.7
100 × 100 × 6 mm 100 6 11.93 9.365 56.2
100 × 100 × 7 mm 100 7 13.8 10.833 65.0
100 × 100 × 8 mm 100 8 15.64 12.277 73.7
100 × 100 × 9 mm 100 9 17.46 13.706 82.2
100 × 100 × 10 mm 100 10 19.26 15.119 90.7
100 × 100 × 12 mm 100 12 22.8 17.898 107.4
100 × 100 × 14 mm 100 14 26.26 20.614 123.7
100 × 100 × 16 mm 100 16 29.63 23.26 139.6
110 × 110 × 7 mm 110 7 15.2 11.932 71.6
110 × 110 × 8 mm 110 8 17.24 13.533 81.2
110 × 110 × 10 mm 110 10 21.26 16.689 100.1
110 × 110 × 12 mm 110 12 25.2 19.782 118.7
110 × 110 × 14 mm 110 14 29.06 22.812 136.9
125 × 125 × 8 mm 125 8 19.75 15.504 93.0
125 × 125 × 10 mm 125 10 24.37 19.13 114.8
125 × 125 × 12 mm 125 12 28.91 22.694 136.2
125 × 125 × 14 mm 125 14 33.37 26.195 157.2
125 × 125 × 16 mm 125 16 37.74 29.626 177.8
140 × 140 × 10 mm 140 10 27.37 21.485 128.9
140 × 140 × 12 mm 140 12 32.51 25.52 153.1
140 × 140 × 14 mm 140 14 37.57 29.492 177.0
140 × 140 × 16 mm 140 16 42.54 33.394 200.4
150 × 150 × 8 mm 150 8 23.75 18.644 111.9
150 × 150 × 10 mm 150 10 29.37 23.055 138.3
150 × 150 × 12 mm 150 12 34.91 27.404 164.4
150 × 150 × 14 mm 150 14 40.37 31.69 190.1
150 × 150 × 15 mm 150 15 43.06 33.802 202.8
150 × 150 × 16 mm 150 16 45.74 35.906 215.4
160 × 160 × 10 mm 160 10 31.5 24.728 148.4
160 × 160 × 12 mm 160 12 37.44 29.39 176.3
160 × 160 × 14 mm 160 14 43.3 33.99 203.9
160 × 160 × 16 mm 160 16 49.07 38.52 231.1
180 × 180 × 12 mm 180 12 42.24 33.158 198.9
180 × 180 × 14 mm 180 14 48.9 38.386 230.3
180 × 180 × 16 mm 180 16 55.47 43.544 261.3
180 × 180 × 18 mm 180 18 61.96 48.639 291.8
200 × 200 × 14 mm 200 14 54.64 42.892 257.4
200 × 200 × 16 mm 200 16 62.01 48.678 292.1
200 × 200 × 18 mm 200 18 69.3 54.401 326.4
200 × 200 × 20 mm 200 20 76.51 60.06 360.4
200 × 200 × 24 mm 200 24 90.66 71.168 427.0
220 × 220 × 16 mm 220 16 68.67 53.906 323.4
220 × 220 × 18 mm 220 18 76.75 60.249 361.5
220 × 220 × 20 mm 220 20 84.76 66.537 399.2
220 × 220 × 22 mm 220 22 92.68 72.754 436.5
220 × 220 × 24 mm 220 24 100.5 78.892 473.4
220 × 220 × 26 mm 220 26 108.3 85.016 510.1
250 × 250 × 18 mm 250 18 87.84 68.954 413.7
250 × 250 × 20 mm 250 20 97.05 76.184 457.1
250 × 250 × 22 mm 250 22 106.2 83.367 500.2
250 × 250 × 24 mm 250 24 115.2 90.432 542.6
250 × 250 × 26 mm 250 26 124.2 97.497 585.0
250 × 250 × 28 mm 250 28 133 104.405 626.4
250 × 250 × 30 mm 250 30 141.8 111.313 667.9
250 × 250 × 32 mm 250 32 150.5 118.142 708.9
250 × 250 × 35 mm 250 35 163.4 128.269 769.6

Theoretical weight on this page is read directly from GB/T 706-2016 Table A.3 for each size — it is the published standard value, not a formula estimate. Angle sections have rounded corners, and the standard treats the corner radii as reference values rather than as delivery conditions, so a radius-based formula cannot reproduce the table reliably. Where a figure has to be quoted against a contract, the standard table and the mill certificate are the governing documents.

Tolerances

Dimensional tolerances for this section are set by GB/T 706-2016 for Chinese-standard orders and by EN 10056-2 (angles) or EN 10365 (channels and beams) for European orders. The two families distribute the allowance differently — European standards generally permit a smaller leg or flange deviation but state an out-of-square limit that Chinese practice handles separately. Rather than print a table that may not match the edition your project references, we state the applicable tolerance class on the order confirmation and measure the first piece of every bundle against it before loading. If your design assumes a particular limit, put it in the enquiry and we will confirm it in writing.

Steel Grades & International Equivalents

All grades below are supplied with a mill test certificate. The right-hand column shows the material type and the Chinese standard the grade is produced to; the middle columns give the nearest recognised equivalent in other national standards. Exact equivalence for a specific project should be confirmed on the enquiry.

GB (China) ASTM / AISI (US) EN (Europe) JIS (Japan) DIN (Germany) Type / Standard
Q235B A36 / A283 Gr.C S235JR (EN 10025-2) SS400 (JIS G3101) St37-2 Carbon structural steel (GB/T 700)
Q355B A572 Gr.50 / A992 S355JR (EN 10025-2) SM490 (JIS G3106) St52-3 High-strength low-alloy (HSLA) steel (GB/T 1591)
SS400 (JIS) A36 S235JR SS400 St37-2 Carbon structural steel (JIS G3101)

Grade Notes

Chemical Composition (%, ladle analysis)

Typical specification limits. Actual heat values are reported on the mill test certificate supplied with every shipment.

Grade C Si Mn P max S max Other elements
Q235B ≤0.20 ≤0.35 ≤1.40 ≤0.045 ≤0.045 —
Q355B ≤0.24 ≤0.55 ≤1.60 ≤0.035 ≤0.035 Ceq ≤0.45
SS400 (JIS) — — — ≤0.050 ≤0.050 —

Mechanical Properties

Minimum values at room temperature unless stated. ReL = yield strength; Rp0.2 = 0.2% proof stress; Rm = tensile strength; A = elongation after fracture.

Grade Yield (ReL) Proof (Rp0.2) Tensile (Rm) Elongation A Impact / others
Q235B ≥235 MPa — 370–500 MPa ≥26% +20 °C, ≥27 J —
Q355B ≥355 MPa (≤16 mm) — 470–630 MPa ≥22% +20 °C, ≥27 J —
SS400 (JIS) ≥245 MPa — 400–510 MPa ≥21% — —

Standards & Documents

Every shipment is accompanied by a mill test certificate to EN 10204 3.1, traceable to the heat number of the supplied material. On request we also provide a certificate of origin, a packing list with bundle-level weights and dimensions, and container loading photographs.

Typical Applications

Industry / Application Typical use
Transmission and telecom towers Leg members and bracing where bolted connections and a large welded perimeter matter more than minimum weight.
Frames, brackets and supports Machine bases, pipe supports and equipment frames fabricated from cut lengths.
Purlins and side rails Light roof and wall framing, usually galvanized when the building is unheated or coastal.
Shelving, racking and mezzanine Uprights and beams where the 90° corner simplifies welded joints.
Solar and PV mounting Array rails and support posts, generally hot-dip galvanized to EN ISO 1461.
Gratings, walkways and handrails Edge members and stanchions in industrial access structures.

Common Problems Buyers Face — and How We Prevent Them

These are the issues that most often cause claims on steel imports. Each one is controlled in our process before shipment.

Theoretical weight and weighed weight do not agree

Why it happens: Theoretical weight is calculated from nominal dimensions. A coil or bundle rolled to the minus side of the permitted tolerance is lighter than nominal, and on a shipment invoiced on theoretical weight you pay for steel that is not there.

Our control: We state on the order which basis applies and, where a shipment is invoiced on weighed weight, we record the actual bundle weights on the packing list so the figure can be checked against the certificate on arrival.

Out-of-square legs

Why it happens: If the 90° corner drifts, bolted and welded joints gap, which means rework and lost fabrication hours on site.

Our control: We check squareness and leg straightness across the first piece of every bundle rather than relying on the mill certificate alone.

Zinc coating uneven on a galvanized order

Why it happens: Coating mass is the single biggest driver of service life in coastal air, and it is the easiest thing to shave on a cheap order.

Our control: The coating grade is stated in writing (for example min. 610 g/m² double-sided to EN ISO 1461) and coating mass is sample-tested on each lot.

Mixed lengths or mixed sizes in one bundle

Why it happens: Loading errors are common when several sizes ship together and are usually only discovered after the container is opened.

Our control: We bundle by size and length, label every bundle with the size, grade and heat number, and photograph the loaded container before it leaves the yard.

Certificates that do not match the delivered material

Why it happens: A certificate issued for the mill’s production run rather than for the heat actually supplied cannot be traced to what arrives on site — which is exactly what an inspector will test.

Our control: We supply an EN 10204 3.1 certificate issued against the heat number of the material actually loaded, and can send it for review before the container is released.

Our Supply Advantages

Packaging, Delivery & Payment

Frequently Asked Questions

How is the weight of an angle steel calculated?

It is not calculated from a simple formula in this case. The theoretical weight is read from the published national standard table, GB/T 706-2016 Table A.3. Angle sections have rounded corners, and the standard treats the corner radii as reference values rather than as delivery conditions, so a formula that needs those radii cannot reproduce the table reliably. The value shown on this page is the table value for this size.

What does the corner radius have to do with the weight?

The nominal cross-section of an angle is the rectangle of the two legs minus the overlap, plus the rounded corners. Those corners add area, and how much they add depends on the internal and edge radii. Because the standard publishes those radii only as reference values, the table weight is the authoritative figure and the radius-based formula is a design-office approximation.

What is the difference between an equal angle and an unequal angle?

Both legs of an equal angle are the same width, so the section is symmetric and can be oriented either way without changing the design. An unequal angle has two different leg widths, which is used when one leg takes the connection and the other stiffens the free edge. They are separate ranges and are not interchangeable at the same nominal size.

What does Equal Angle Steel 70 × 70 × 8 mm weigh?

Equal Angle Steel 70 × 70 × 8 mm at 70 × 70 × 8 mm weighs 8.376 kg per metre, taken from GB/T 706-2016 Table A.3. A 6 m length of this size weighs approximately 50.3 kg and a 12 m length approximately 100.5 kg.

Which steel grades do you supply?

Q235B and Q355B to GB/T 1591 as standard, and SS400 to JIS G3101. Where a European or American specification applies, we confirm the equivalence against the project specification — S235JR and ASTM A36 are the usual counterparts to Q235B, and S355JR / A572 Gr. 50 to Q355B — rather than relying on the grade name alone.

Is the section available galvanized?

Yes. Hot-dip galvanized to EN ISO 1461 is available on request and the coating mass is stated in writing on the order. Galvanizing adds roughly 3–6 % to the weighed mass depending on section thickness. If your order is priced on theoretical weight the coating is not included; if it is priced on weighed weight it is. Please say which basis you need.

What is the difference between a Chinese and a European angle?

The two ranges are similar but not identical: leg widths, thickness steps and corner radii differ, and the tolerance rules are written differently. If your detail was designed to EN 10056, send us the required section properties and we will confirm which Chinese size satisfies them — a nominal size match is not enough.

Do you supply cut lengths?

Yes. 6 m is standard, 9 m and 12 m are available, and cut-to-length is offered against a cutting list with the cut ends deburred. For galvanized material the cut faces can be given a zinc-rich repair coat so the corrosion protection stays continuous.

What is the minimum order quantity?

It depends on the size and on whether the requirement can be consolidated with other sections in the same container. Tell us the size, grade, length, quantity and destination port and we will come back with a workable loading plan and a price.

Can you supply the mill test certificate before shipment?

Yes. Certificates to EN 10204 3.1 are issued against the heat number of the material actually loaded and can be sent for review before the container is released, so any discrepancy is resolved before the goods leave rather than after arrival.

Who supplies equal angle steel from China with documented weights?

Shandong Dayang supplies equal angle steel across the full standard size range, with the theoretical weights taken from GB/T 706-2016 Table A.3, dimensions verified in-house before shipment, and full mill test certification on every order.

Request a Quotation for Equal Angle Steel 70 × 70 × 8 mm

Send us the size, grade, length, quantity and destination port, and we will come back with a quotation and a loading plan. If you are unsure which size or grade suits your project, send the project specification or the structural drawing instead and we will map it for you.

Technical details on this page are given for guidance. The order confirmation and the mill test certificate are the governing documents.

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