BTM® EzyForm

Material Properties & Specification

1
Specification - TS21*
Minimum Yield Minimum Tensile Min. Elongation
2 ½
D/t * Strength Strength on 5.65 So
(MPa) (MPa) (%)
Less than 15 300 310 15
15 to 25 275 300 20
Over 25 to 35 250 290 25
Over 35 200 280 30

NOTES:
1
* A copy of TS21 can be downloaded online from the link on the main BTM
EzyForm page
2
* "D" is the diameter or equivalent round, and "t" is the nominal wall
thickness of the section

Tolerances
Outside Dimensional Tolerances

Circular Square/Rectangular Other Shapes

Outside Tole- Dimension, Tole- Dimension, Tolerance
Diameter, D rance a rance a Major Minor
(mm) (mm) (mm) (mm) (mm) (mm) (mm)
≤ 16 ± 0.10 ≤ 20 ± 0.15 ≤ 20 ± 0.15 ± 0.30
> 16 and ≤ 25 ± 0.15 > 20 and ≤ 40 ± 0.20 > 20 and ≤ 40 ± 0.20 ± 0.40
> 25 and ≤ 50 ± 0.20 > 40 and ≤ 60 ± 0.25 > 40 and ≤ 60 ± 0.25 ± 0.50
> 50 and ≤ 75 ± 0.25 > 60 and ≤ 80 ± 0.30 > 60 and ≤ 80 ± 0.30 ± 0.60
> 75 and ≤ 100 ± 0.30 > 80 and ≤ 100 ± 0.35 > 80 and ≤ 100 ± 0.35 ± 0.70
> 100 and ≤ 125 ± 0.35 > 100 and ≤ 120 ± 0.40 > 100 and ≤ 120 ± 0.40 ± 0.80

Wall Thickness Tolerances

Wall Thickness Tolerance (mm)

(mm) Commercial
≤ 1.0 ± 0.10
> 1.0 and ≤ 1.6 ± 0.15
> 1.6 and ≤ 2.0 ± 0.20
> 2.0 and ≤ 3.0 ± 0.25
> 3.0 and ≤ 4.0 ± 0.30
> 4.0 and ≤ 5.0 ± 0.35
> 5.0 and ≤ 6.0 ± 0.40

Straightness Tolerances
Better than 1 in 600 based on 6.1 metre length.

®
BTM EzyForm OneSteel Market Mills September 2001
Product Specifications
Twist, Flatness & Squareness Tolerances (For Non-Circular Sizes)

Twist Flatness Squareness

Largest Tolerance
Dimension (mm) in 1m (mm)
≤ 12.7 0.9 Variation across any Maximum out of
> 12.7 and ≤ 38.1 1.4 face shall not square of adjacent
> 38.1 and ≤ 63.5 1.7 exceed half of the sides shall be
total outside 0.10mm in 10mm
dimensional face width
> 63.5 and ≤ 101.6 2.1 tolerance as set out (equivalent to 0.6°)
above

Length Tolerances
The standard length of precision tube is 6.1 metres. Other mill lengths are available in a range of 4.0 to
8.0 metres.

Length tolerance is + 50 mm, -0 mm, although tighter tolerance can be achieved for special applications.
The standard end finish is mill cut ends and double shear or saw cut.

®
BTM EzyForm OneSteel Market Mills September 2001
Product Specifications
BTM® Galvabond®
Material Properties & Specification

Specification Minimum Minimum Tensile Min. Elongation

½
Yield Strength Strength on 5.65 So
(MPa) (MPa) (%)
TS30* 300 350 15

NOTES:
- Pre-galvanized strip is manufactured to AS 1397 or equivalent
- * A copy of TS30 can be downloaded online from the link on the main BTM
Galvabond page

Tolerances
Outside Dimensional Tolerances

Circular Square/Rectangular Other Shapes

Outside Tole- Dimension, Tole- Dimension, Tolerance
Diameter, D rance a rance a Major Minor
(mm) (mm) (mm) (mm) (mm) (mm) (mm)
≤ 16 ± 0.10 ≤ 20 ± 0.15 ≤ 20 ± 0.15 ± 0.30
> 16 and ≤ 25 ± 0.15 > 20 and ≤ 40 ± 0.20 > 20 and ≤ 40 ± 0.20 ± 0.40
> 25 and ≤ 50 ± 0.20 > 40 and ≤ 60 ± 0.25 > 40 and ≤ 60 ± 0.25 ± 0.50
> 50 and ≤ 75 ± 0.25 > 60 and ≤ 80 ± 0.30 > 60 and ≤ 80 ± 0.30 ± 0.60
> 75 and ≤ 100 ± 0.30 > 80 and ≤ 100 ± 0.35 > 80 and ≤ 100 ± 0.35 ± 0.70
> 100 and ≤ 125 ± 0.35 > 100 and ≤ 120 ± 0.40 > 100 and ≤ 120 ± 0.40 ± 0.80

Wall Thickness Tolerances

Wall Thickness Tolerance

(mm) (mm)
≤ 1.0 ± 0.10
> 1.0 and ≤ 1.6 ± 0.15
> 1.6 and ≤ 2.0 ± 0.20

Straightness Tolerances
Better than 1 in 600 based on 6.1 metre length.

Twist, Flatness & Squareness Tolerances (For Non-Circular Sizes)

Twist Flatness Squareness

Largest Tolerance
Dimension (mm) in 1m (mm)
≤ 12.7 0.9 Variation across any Maximum out of
> 12.7 and ≤ 38.1 1.4 face shall not square of adjacent
> 38.1 and ≤ 63.5 1.7 exceed half of the sides shall be
total outside 0.10mm in 10mm
dimensional face width
> 63.5 and ≤ 101.6 2.1 tolerance as set (equivalent to 0.6°)
above

® ®
BTM Galvabond OneSteel Market Mills September 2001
Product Specifications
Length Tolerances
The standard length of precision tube is 6.1 metres. Other mill lengths are available in a range of 4.0 to
8.0 metres.

Length tolerance is + 50 mm, -0 mm, although tighter tolerance can be achieved for special applications.

The standard end finish is mill cut ends and double shear or saw cut.

® ®
BTM Galvabond OneSteel Market Mills September 2001
Product Specifications
BTM® Hi-Lite®
Material Properties & Specification
1
Specification - TS22*
Yield Tensile Elongation on
½
Strength Strength 5.65 So
(MPa) (MPa) (%)
Minimum 400 450 12
Typical Range 400 to 500 450 to 550 15 to 30

NOTES:
1
* A copy of TS22 can be downloaded online from the link on the main BTM
Hi-Lite page
Other grades are available to suit the application.

High Strength/Mass Saving Examples

® ® ®
Substituting BTM EzyForm with BTM Hi-Lite :
®
EzyForm Hi-Lite Higher Strength* Mass Savings
(Original) (Substitute) (%) (%)
31.8 x 1.6 31.8 x 1.2 13.4 9.4
19.0 x 1.6 19.0 x 1.2 6.6 23.3
16.0 x 16.0 x 1.6 16.0 x 16.0 x 1.2 7.2 23.4
* Strength comparison based on a simply supported beam under point load

Tolerances
Outside Dimensional Tolerances

Circular Square/Rectangular
Outside Diameter, D Tolerance Dimension, a Tolerance
(mm) (mm) (mm) (mm)
≤ 16 ± 0.10 ≤ 20 ± 0.15
> 16 and ≤ 25 ± 0.15 > 20 and ≤ 40 ± 0.20
> 25 and ≤ 50 ± 0.20 > 40 and ≤ 60 ± 0.25
> 50 and ≤ 75 ± 0.25 > 60 and ≤ 80 ± 0.30
> 75 and ≤ 100 ± 0.30 > 80 and ≤ 100 ± 0.35
> 100 and ≤ 125 ± 0.35 > 100 and ≤ 120 ± 0.40

Wall Thickness Tolerances

Wall Thickness Tolerance (mm)

(mm) Commercial
≤ 1.0 ± 0.10
> 1.0 and ≤ 1.6 ± 0.15
> 1.6 and ≤ 2.0 ± 0.20
> 2.0 and ≤ 3.0 ± 0.25
> 3.0 and ≤ 4.0 ± 0.30
> 4.0 and ≤ 5.0 ± 0.35
> 5.0 and ≤ 6.0 ± 0.40

Straightness Tolerances
Better than 1 in 600 based on 6.1 metre length.

® ®
BTM Hi-Lite OneSteel Market Mills September 2001
Product Specifications
Twist, Flatness & Squareness Tolerances (For Non-Circular Sizes)

Twist Flatness Squareness

Largest Tolerance
Dimension (mm) in 1m (mm)
≤ 12.7 0.9 Variation across any Maximum out of
> 12.7 and ≤ 38.1 1.4 face shall not square of adjacent
> 38.1 and ≤ 63.5 1.7 exceed half of the sides shall be
total outside 0.10mm in 10mm
dimensional face width
> 63.5 and ≤ 101.6 2.1 tolerance as set (equivalent to 0.6°)
above

Length Tolerances
The standard length of precision tube is 6.1 metres. Other mill lengths are available in a range of 4.0 to
8.0 metres.

Length tolerance is + 50 mm, -0 mm, although tighter tolerance can be achieved for special applications.

The standard end finish is mill cut ends and double shear or saw cut.

® ®
BTM Hi-Lite OneSteel Market Mills September 2001
Product Specifications
BTM® Hi-Form28®
Material Properties & Specification
1
Specification - TS28*
2
D/t * Minimum Minimum Tensile Min. Elongation
½
Yield Strength Strength on 5.65 So
(MPa) (MPa) (%)
Less than 15 300 310 15
15 to 25 275 300 20
Over 25 to 35 250 290 25
Over 35 200 280 30

NOTES:
1
* A copy of TS28 can be downloaded online from the link on the main BTM
Hi-Form page
2
* "D" is the diameter or equivalent round, and "t" is the nominal wall
thickness of the section

Length
The standard length of precision tube is 6.1 metres. Other mill lengths are available in a range of 4.0 to
8.0 metres.

Length tolerance is + 50 mm, -0 mm, although tighter tolerance can be achieved for special applications.

The standard end finish is mill cut ends and double shear or saw cut.

® ®
BTM Hi-Form28 OneSteel Market Mills September 2001
Product Specifications