September 27, 2018

Carbon Steel 270-480

ISO3755, 270-480, 270-480W Carbon Steel

Casting grades: 270-480, 270-480W

Metal Type: Carbon Steels

Casting Process: Sand Casting or Lost Wax Precision Investment Casting

Standard: ISO 3755 – 1991 Cast carbon steels for general engineering purposes
ISO 3755 was revised by ISO 14737:2015 specifies requirements for carbon and low alloy cast steel grades for general applications.

Similar Grade:
GB/T 11352 Grade ZG270-500;
ASTM A27 Grade 70-40[485-275] (UNS Code: J02501);
EN10213 Grade GP280GH, EN Number. 1.0625
DIN1681 Grade GS52;
JIS5101 Grade SC480;
ГОСТ 977 Grade 35Л

Heat treatment: Annealing, Quenching and Tempering

Steel GradeC %Mn  %Si %P %S %Ni  %Cr %Cu %Mo %V %
Steel GradeTensile Strength

Rm Mpa

Upper Yield  Re,  MpaElongation


Reduction of area

Z %

Impact Strength



1. Mechanical properties are obtained from 28mm thick standard test blocks.
2. The testing ambient temperature was take as 23 ±- 5°C degree
3. For Grades 270-480 and 270-480w, the casting will have an Re of 260 MPa and an Rm of 500-650MPa, in sectioins from 28mm up to 40mm.

What’s the means “W” in ISO3755?

“W” means WELDABLE GRADE.  For example, 270-480 is non-weldable grade casting materiel, it’s choice of chemical composition shall be left to the discretion of the manufacturer.  But 270-480W is weldable grade, ISO 3755 standard indicate the detailed chemistry for welding purpose. In fact, 270-480 and 270-480W have same mechaincal property.

Metal Castings

Pump Cover for liquid ring vacuum pump
Bucket Teeth/Dippers for Excavator
Volute Casting for Pumps
Carbon Steel ,

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