a Cu ≤ 0.50 %; Ni ≤ 0.50 %; Cr ≤ 0.50 % iyo Mo ≤ 0.15 %.

b Mid kasta oo ka hooseeya 0.01% ee ka hooseeya qiyaasta ugu badan ee kaarboonka, korodhka 0.05 % ee ka sarreeya fiirsashada ugu badan ee Mn waa la oggol yahay, ilaa ugu badnaan 1.65 % darajooyinka ≥ L245 ama B, laakiin ≤ L360 ama X52; ilaa ugu badnaan 1.75 % ee darajooyinka> L360 ama X52, laakiin <L485 ama X70; iyo ilaa ugu badnaan 2.00 % ee darajada L485 ama X70.

c ilaa si kale lagu heshiiyo, Nb + V ≤ 0.06 %.

d Nb + V + Ti ≤ 0.15 %.

e Haddii aan si kale lagu heshiin.

Haddii aan si kale lagu heshiin, Nb + V + Ti ≤ 0.15 %.

g Wax si ula kac ah loogu daro B lama ogola inta soo hadhayna B ≤ 0.001 %.

Heerka Dhuumaha

Rt0.5

Rm

Af

Rm

c Muddada ugu yar ee la cayimay,Af, lagu muujiyey boqolkiiba oo lagu soo koobay boqolkiiba ugu dhow, waa in lagu go'aamiyaa iyadoo la isticmaalayo isla'egta soo socota:

xagee

C waa 1940 xisaabinta iyadoo la isticmaalayo unugyada SI iyo 625,000 xisaabinta iyadoo la isticmaalayo cutubyada USC;

Axc waa qaybta tijaabada jeebka ee lagu dabaqi karo aagga iskutallaabta, oo lagu muujiyey milimitir laba jibaaran (inji laba jibaaran), sida soo socota:

1) qaybo tijaabo ah oo iskutallaab ah oo wareeg ah, 130 mm2 (0.20 in.2) ee 12.7 mm (0.500 in.) iyo 8.9 mm (0.350 in.) qaybaha tijaabada dhexroorka; 65 mm2 (0.10 in.2) ee 6.4 mm (0.250 in.) qaybaha tijaabada dhexroor;

2) qaybo tijaabo ah oo dhamaystiran, ka yar ee a) 485 mm2 (0.75 in.2) iyo b) aagga qaybta tijaabada ah, oo laga soo qaatay iyada oo la isticmaalayo dhexroor dibadda ah oo cayiman iyo dhumucda gidaarka ee la cayimay ee tuubada. lagu soo koobay 10 mm2 ugu dhow (0.01 in.2);

3) qaybaha tijaabada xariijimaha, ka yar ee a) 485 mm2 (0.75 in.2) iyo b) aagga iskutallaabta ee gabal tijaabo ah, oo laga soo qaatay iyadoo la isticmaalayo ballaca cad ee cadadka tijaabada iyo dhumucda gidaarka la cayimay ee tuubada , lagu soo koobay 10 mm2 ugu dhow (0.01 in.2);

U waa xoogga xajinta ugu yar ee la cayimay, oo lagu muujiyay megapascals (pounds per square).