ISO TR 4956:1984 pdf free
ISO TR 4956:1984 pdf free.Wrought steels for use at elevated temperatures in engines
If the tensile and impact properties at room temperature are to be verified on test pieces in the delivery condition (require-ment classes 5 and 6), the samples and test pieces shall be taken from the delivery in accordance with figure 1a or 1b, and shall be prepared in accordance with the International Standards mentioned in figures 1a or 1b.
If the tensile and impact properties at room temperature are to be verified on reference test pieces (requirement classes7, 8, 9 or 10), the test sarmples shall be taken from the delivery in accordance with figure 1a or 1 b and shall be heat treated in accordance with the heat- treatment conditions indicated in table 5 for the relevant steel. If in this table more than one heat treatment is indicated for the steel concerned, the treatment to be applied shall be agreed at the time of enquiry and order.
After the heat-treatment of the samples, the test pieces shall be taken and prepared in accordance with the indicationsin figure 1aor 1b.
If the yield or proof stress at elevated temperatures as specified in table 6 is to be verified on test pieces in the delivery condition (requirement class 6) or on referencc test pieces (requirement classcs 8 or 10), a test piece according to ISO/R 783 shall be taken under conditions corresponding to those specified for taking the test pieces for the tensile tests at room temperature (see 5.3.3.2 and 5.3.3.3).
In cases of dispute, the methods used for the chemical analysis shall be those established by the relevant International Standards. If no International Standards are available, the methods shall be agreed upon at the time of enquiry and order.
The Brinell hardness test shall be made in accordance with ISO/R 79. The Vickers hardness test shall be made in accordance with ISO/R 81.
The tensile test at room temperature shall be made in accordance with the International Standards according to which the test pieces are to be prepared (see figures 1a and b).ISO TR 4956 pdf download.
