AS NZS 1163 - Tianjin Brisk Metalwork Co.,Ltd

AS/NZS 1163 Structural Steel Hollow Section Manufacturer and Supplier – Brisk Steel

Standard	AS/NZS 1163
Material	Carbon steel
Process	Cold-formed ERW carbon steel pipe
Shape	Round, square, or rectangular
Grade	C250, C250L0, C350, C350L0, C450, C450L0
Surface	galvanized, Painted
Appliance	General structural and engineering applications

What is the AS/NZS 1163 ?

This Standard specifies the requirements for the production and supply of cold-formed,electric resistance-welded, steel hollow sections used for structural purposes. It considersthree strength grades, with or without impact properties, that are suitable for welding.

Notes: This Standard applies to structural hollow sections formed cold without subsequent heat treatment.

AS/NZS 1163 C350L0 HOLLOW SECTION — CFSHS

Designation

AS/NZS 1163 means number of this standard.

C : cold-formed sections

350: minimum yield strength in Mpa

L : guaranteed impact properties of the material

0 : low temperature impact test at 0℃

Notes: The finshed hollow section product shallbe manufactured by the cold-forming process anduse electric resistance-welding techniques to join the strip edges. The weld seam is to belongitudinal and shall have the external upset removed. There shall be no subsequentoverall heat treatment on the finished product.

Chemical Composition

Cast Chemical Composition

The chemical composition of castings refers to the measurement of the chemical composition of the raw materials used in the manufacture of steel pipes.

Notes: It should be noted that casting analysis is not a chemical composition analysis of the finished steel pipe.

Grades ¹	Chemical composition (cast or product analysis)² %, max
Grades ¹	C	Si	Mn	P	S	Cr	Mo	AI ³	Ti	Micro-alloying elements	CE ⁴
C250, C250L0	0.12	0.05	0.50	0.03	0.03	0.15	0.10	0.10	0.04	0.03 ⁵	0.25
C350, C350L0	0.20	0.25	1.60	0.03	0.03	0.30	0.10	0.10	0.04	0.15⁶	0.43
C450, C450L0	0.20	0.25 ⁷	1.70	0.03	0.03	0.30	0.35	0.10	0.04	0.15 ⁶	0.43
1 The use of sulphide modification manufacturing techniques for these grades is permitted. 2 The following elements may be present to the limits stated: a Copper 0.25%; b Nicker 0.25%; 3 Limits specified are for soluble or total aluminium. 4 Carbon equivalent (CE) is calculated from the following equation: CE=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15 5 Applies to niobium and vanadium only. However, niobium greater than 0.01% is not permitted. 6 Applies to niobium, vanadium and titanium only. However, vanadium greater than 0.1% is not permitted. 7 For circular hollow sections (CHS), the silicon limit shall be 0.45.

Product Chemical Composition

Chemical analysis of the finished product is not a requirement of this Standard.If the steelis subjected to a finished product analysis, which is required to meet both the casting chemical composition in the table above and the chemical composition deviations in the table below.

Notes: Product Chemical Composition refers to the chemical composition of the finished AS 1163 steel pipe.

product analysis tolerances for grades given in cast chemical composition
Element	Tolerance over maximum limit
C (Carbon)	0.02
Si (Silicon)	0.05
Mn (Manganese)	0.10
P (Phosphorous)	0.005
S (Sulphur)	0.005
Cr (Chromium)	0.05
Ni (Nickel)	0.05
Mo (Molybdenum)	0.03
Cu (Copper)	0.04
AI (Aluminium) (total)	-0.005
Micro-alloying elements (niobium and vanadium only) for Grades C250, C250L0	0.06 with niobium no greater than 0.020
Micro-alloying elements (niobium, vanadium, and titanium only) for Grades C350, C350L0, C450, C450L0	0.19 with vanadium no greater than 0.12

Mechanical Properties

The mechanical properties of AS 1163 can be measured using three tests: Tensile test, Impact test and Cold Flattening test.

Prior to tensile or impact testing, the test pieces shall be aged by heating to a temperature between 150°C and 200°C for not less than 15 min.

Tensile Requirement

The tensile test measures the yield strength, tensile strength and elongation of AS 1163 and the test shall comply with the requirements of AS 1391.

Grade	Minimum yield strength, MPa	Minimum tensile strength, MPa	Minimum elongation as a proportion of the gauge length of 5.65 √S₀, %
			Circular hollow sections do/t			Rectangular hollow sections b/t, d/t
			≤ 15	＞15 ≤30	＞30	≤ 15	＞15 ≤30	＞30
C250, C250L0	250	320	18	20	22	18	16	18
C350, C350L0	350	430	16	18	20	12	14	16
C450, C450L0	450	500	12	14	16	10	12	14
Note: These limits apply to the face from which the tensile test is taken. That is, for RHS, the use of the b/t or d/t ratio is dependent on which face the test specimen is cut from. For SHS, there is only one ratio (as b = d).

If the cross-sectional area is greater than 1000 mm², the elongation requirement for structural steel tubes should be reduced by 2% from the standard requirement.

Impact Requirement

Hollow structural tubes with wall thicknesses ≥ 6 are required to perform a 0°C impact test by AS 1544.2. However, wall thickness <6mm does not require impact testing.

Grade	Test temperature	Minimum absorbed energy, J
		Size of test piece
		10 mm×10 mm		10 mm×7.5 mm		10 mm×5 mm
		Average of 3 tests	Individual test	Average of 3 tests	Individual test	Average of 3 tests	Individual test
C250L0 C350L0 C450L0	0℃	27	20	22	16	18	13

Cold Flattening Requirement

Cold Flattening is suitable for tubes with circular hollow sections.

Hold the specimen flat between two parallel planes until the distance between the surfaces is 0.75 outer diameter or less and there should be no evidence of cracks or defects.

Products Description

There is no restriction on the size of steel pipe in AS/NZS 1163, just a list of common dimensions.

Brisk Steel can provide you with AS/NZS 1163 ERW steel pipe in the following sizes:

Dimension	Outside Diameter	Wall Thickness
CHS	21.3 – 660 mm	2 – 20 mm
RHS	10X20 – 400X600 mm	up to 16mm
SHS	20X20 – 500X500 mm	up to 16mm

Dimensional Tolerance

Tolerance on Shape and Mass

Characteristic	Circular hollow sections	Square and rectangular hollow sections
External dimensions(d_o, d, and b)	±1%, with a minimum of ±0.5 mm and a maximum of ±10 mm	±1%, with a minimum of ±0.5 mm
Thickness (t)	For d_o ≤ 406.4 mm: ±10 %; For d_o＞406.4 mm: ±10 % with a max of ±2 mm	±10 %
Out-of-roundness (o)	±2% for hollow sections having a diameter-to-thickness ratio not exceeding 100 ¹	-
Concavity/convexity ²	-	Max 0.8 % or 0.5 mm, whichever is greater
Squareness of sides	-	90°±1°
Twist (v)	-	2 mm + 0.5mm/m length
Straightness ³	0.20% of total length	0.15% of total length
Mass (m) per unit length	Not less than 0.96 times the specified mass ⁴ on individual lengths
1 Where the diameter-to-thickness ratio exceeds 100, the tolerance on out-of-roundness becomes the subject of agreement between the manufacturer and purchaser. 2 The tolerance on convexity and concavity is independent of the tolerance on external dimensions. 3 The straightness tolerance applies to straightness in any one plane. 4 In lieu of any other requirement, the specified mass is considered to be the nominal mass as noted in clause 15.

Tolerance on External Corner Profile

Perimeter, mm	External corner profile (c₁, c₂, or r_o)
Equivalent to 50 x 50 or less	1.5t to 3.0t
Equivalent to greater than 50 x 50	1.8t to 3.0t
Note: The sides need not be tangential to the corner arcs.

Tolerance on Length

Type of length	Range, mm	Tolerance
Random length	4000 to 16000 with a range of 2000 per order item	10% of sections supplied may be below the minimum for the ordered range but not less than 75% of the minimu
unspecified length	All	0 – +100mm
Precision length	≤ 6000	0 – +5mm
	＞6000 ≤10000	0 – +15mm
	＞10000	0 – +5mm +1mm/m

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