ISO 3574 1999 Commercial Cold Rolled CR 1 Steels

Designation for Commercial Steels

CR1 is the designation for cold rolled commercial steels in the international standard.

Chemical Composition of Commercial Cold Roll Steels: The Chemical Composition of International Commercial Steels:

The chemical composition of Commercial steel CR 1 as defined in International Standard is described as under:

• Maximum percentage of Carbon (C) is 0.15 percent.
• Maximum percentage of Manganese (Mn) is 0.60 percent.
• Maximum percentage of Phosphorous (P) is 0.05 percent.
• Maximum percentage of Sulphur (S) is 0.035 percent.

Remaining percentage is of iron (Fe) percentage and with few negligible impurities.

The Mechanical Properties of Commercial Steels in International Standard:

Similar to JIS, The international standard defines the tensile strength of materials but it defines the maximum range whereas the JIS defines the minimum range.

• The maximum tensile strength for HR1 material is 410 MPa.
• However the elongation is in between 28 percent minimum depending on the material thickness.
• The material designation is conforming on 180 degree bend on itself.

Read more about the equivalent standard of ISO 3574 1999 CR 1 in JIS G 3141 along with the material suppliers, processes and applications. 

>>JIS G 3141 Commercial Cold Rolled SPCC Steels.