Steel Bars are round and square for structural and general engineering purposes

IS 1732 Scope – Key Specifications & Tables

• Scope: Covers dimensions, sectional areas, and mass of hot-rolled round and square steel bars.
• Dimensions & Mass: Given in Tables 1 & 2 for round and square bars respectively.
• Cross-Sectional Area & Mass: Rounded to 3 significant figures for accuracy.

Table Extract (Typical values)

Important Notes:

• Tolerance: Rolling and cutting tolerances conform to IS 1852:1985.
• Standard Mark: BIS certification ensures quality and compliance.
• Use: Tables assist in design calculations and procurement.

Cross-sectional Area Formula (Round Bars)

[ A = \frac{\pi}{4} d^2 ]

Where:

• ( A ) = Cross-sectional area (cm²)
• ( d ) = Diameter (cm)

Visual Summary

flowchart LR
    A[IS 1732 Scope] --> B[Hot-rolled Steel Bars]
    B --> C[Round Bars]
    B --> D[Square Bars]
    C --> E[Table 1: Diameter, Area, Mass]
    D --> F[Table 2: Side Width, Area, Mass]
    E & F --> G[Design & Quality Control]

This provides quick reference for design and quality assurance of steel bars per IS 1732.

IS 1732 Key References: Dimensions, Sectional Areas & Mass of Steel Bars

1. Cross-Sectional Area & Mass Tables (Clause 4.1 & 4.1.1)

• Values rounded to 3 significant figures.
• Refer to Tables 1 & 2 for full ranges of hot-rolled round and square bars.

2. Formula for Cross-Sectional Area

• Round Bars:
  ( A = \frac{\pi}{4} d^2 )
  where ( d ) = diameter in mm

• Square Bars:
  ( A = a^2 )
  where ( a ) = side width in mm

3. Mass per metre (approximate)

( \text{Mass} = A \times \rho )
where ( \rho = 7.85 , \text{g/cm}^3 ) (

IS 1732: Designation, Dimensions & Mass of Steel Bars

Designation (Clause 3.1):

• Round steel bars: ISRO + diameter in mm (e.g., ISRO 10 for 10 mm dia)
• Square steel bars: ISSQ + side width in mm (e.g., ISSQ 10 for 10 mm side)

Key Tables (Clause 4.1 & 4.1.1)

Formulas

• Round Bar Area:
  [ A = \frac{\pi}{4} \times d^2 \quad (cm^2) ]
• Square Bar Area:
  [ A = a^2 \quad (cm^2) ]
• Mass per meter:
  [ m = A \times \rho ] where (\rho = 7.85 , g/cm^3) (steel density)

Tolerances (Clause 5.1)

• Rolling and cutting tolerances as per IS 1852:1985.

This standard ensures uniformity in size, mass, and designation for hot-rolled steel bars used in construction.

IS 1732: Dimensions and Mass of Hot-Rolled Steel Bars

Key Specifications (Clause 4.1 & 4.1.1)

• Dimensions and mass for round and square hot-rolled steel bars are standardized.
• Cross-sectional areas and mass per meter are given in Tables 1 & 2 respectively.
• Values are rounded to three significant figures.
• Mass values are in kg/m, sectional areas in cm².
• Tolerances for rolling and cutting conform to IS 1852:1985 (Clause 5.1).

Table Summary: Selected Values

Important Formulas

• Cross-sectional area of round bar:

  [ A = \frac{\pi}{4} d^2 ]

• Mass per meter (approximate):

  [ m = A \times \rho ]

  where steel density, (\rho \approx 7.85 , \text{g/cm}^3) or (7850 , \text{kg/m}^3).

IS 1732: Tolerances for Hot-Rolled Steel Bars

Key Reference:

• Tolerances for rolling and cutting of hot-rolled steel bars are governed by IS 1852:1985 (Rolling and Cutting Tolerances for Hot-Rolled Steel Products).

Important Points from IS 1732:

• Clause 5.1: Rolling and cutting tolerances for steel bars shall conform to IS 1852:1985.
• Cross-sectional areas and dimensions of round and square bars are provided in Tables 1 & 2 (Clause 4.1).
• Dimensions and mass are rounded to three significant figures.

Typical Tolerance Values (as per IS 1852:1985):

Note: Exact values should be confirmed from IS 1852:1985.

Cross-Sectional Area & Mass (Example from Table 1 & 2):

Summary:

• Use IS 1852:1985 for detailed rolling and cutting tolerances.
• Dimensions and mass are standardized as per Tables