Cu ≤ 0.50%; Ni ≤ 0.50%; Cr ≤ 0.50% thiab Mo ≤ 0.15%.

b Rau txhua qhov kev txo qis ntawm 0.01% qis dua qhov kev qhia siab tshaj plaws rau cov pa roj carbon, qhov nce ntawm 0.05% siab tshaj qhov teev siab tshaj plaws rau Mn yog tso cai, mus txog qhov siab tshaj ntawm 1.65% rau qib ≥ L245 lossis B, tab sis ≤ L360 lossis X52; mus txog qhov siab tshaj plaws ntawm 1.75% rau qib> L360 lossis X52, tab sis <L485 lossis X70; thiab mus txog qhov siab tshaj ntawm 2.00% rau Qib L485 lossis X70.

c Tshwj tsis yog tias pom zoo, Nb + V ≤ 0.06 %.

d Nb + V + Ti ≤ 0.15 %.

e Yog tsis pom zoo.

f Yog tsis pom zoo, Nb + V + Ti ≤ 0.15 %.

g Tsis txhob txhob txwm tshaj tawm B raug tso cai thiab cov seem B ≤ 0.001%.

Qib Qib

qhov twg

C yog 1940 rau kev suav siv SI units thiab 625,000 rau kev suav nrog USC units;

Axc yog qhov siv tau tensile xeem piece cross-sectional cheeb tsam, qhia nyob rau hauv square millimeters (square inches), raws li nram no:

1) rau daim kab ntawv hla hla ntu, 130 mm2 (0.20 in.2) rau 12.7 mm (0.500 in.) thiab 8.9 mm (0.350 in.) txoj kab uas hla kuaj daim; 65 mm2 (0.10 in.2) rau 6.4 mm (0.250 in.) txoj kab uas hla xeem daim;

2) rau tag nrho-section xeem daim, qhov tsawg dua ntawm a) 485 mm2 (0.75 in.2) thiab b) qhov hla ntu ntawm cov khoom xeem, muab tau los ntawm kev siv cov kab lus sab nraud thiab cov phab ntsa tuab ntawm cov yeeb nkab, sib npaug rau qhov ze tshaj 10 mm2 (0.01 in.2);

3) rau daim kab xev xeem, qhov tsawg dua ntawm a) 485 mm2 (0.75 in.2) thiab b) qhov chaw hla ntu ntawm daim ntawv xeem, muab tau los siv qhov dav dav ntawm daim ntawv xeem thiab cov phab ntsa thickness ntawm cov yeeb nkab. , sib npaug rau qhov ze tshaj 10 mm2 (0.01 in.2);

U yog qhov tsawg kawg nkaus tensile lub zog, qhia nyob rau hauv megapascals (pounds ib square inch).