Minimum Preheat And Interpass Temperatures - Lincoln Electric Stick Electrode Welding C2.410 Manual

Minimum Preheat and Interpass Temperature
T
Inches
Thru 3/4"
3/4 thru 1-1/2
1-1/2 thru 2-1/2
Over 2-1/2"
Definitions
T – Thickness of the thickest part at point of welding.
Col. 1 – For the following steels when welded with other than
low hydrogen electrodes ASTM A36; A53 Grade B;
A106 Grade B; A131 Grades A, B, CS, D, DS, E; A139
Grade B; A381 Grade Y35; A500 Grades A, B; A501;
A516; A524 Grades I & II; A570 All grades; A573 Grade
65; A709 Grade 36 (≤ 3/4 in. [20mm]); AP15L Grades
B, X42; ABS Grades A, B, C, D, CS, DS, E.
Col. 2 – For the following steels: All steels listed in Column 1,
and additionally: ASTM A36 (>3/4 in. [20mm]); A53
Grade B; A106 Grade B; A131 Grades A, B, CS, D, DS,
E, AH32 & 36, DH 32 & 36, EH 32 & 36; A139 Grade B;
A381 Grade Y35; A441; A500 Grade A, Grade B;
A501; A516 Grades 55 & 60, Grades 65 & 70, A524
Grades 1 & 2; A529 Grades 50 & 55; A537 Classes I & II;
A570 All Grades; A572 Grades 42, 50, 55; A573 Grade
60; A588, A595 Grades A, B, C; A606; A607 Grades
45, 50, 55; A618 Grades Ib, II, III; A633 Grades A, B,
Grades C, D; A709 Grades 36 (≤ 3/4 in. [20mm]), 50,
50W; A710 Grade A, Class 2 (≤ 2 in. [50mm]); A808;
A913 Grade 50; A992; API 5L Grade B, Grade X42; API
Spec. 2H Grades 42, 50; API 2W Grades 42, 50, 50T;
API 2Y Grades 42, 50, 50T; ABS Grades AH 32 & 36,
DH 32 & 36, EH 32 & 36; ABS Grades A, B, D, CS, DS,
Grade E
Col. 3 – For steels ASTM A572 Grades 60 and 65, A633 Grade
E; API 5L Grade X52; ASTM A913 Grades 60, 65; A710
Grade A, Class 2 (≤ 2 in. [50mm]); A710 Class 3 (≤ 2 in.
[50mm]); A709 Grade 70W; A852, API 2W Grade 60;
API 2Y Grade 60
Col. 4 – All thicknesses ≥ 1/8 in. [3mm]. ASTM A710 Grade A
(all classes); ASTM A913 Grades 50, 60, 65. SMAW
electrodes capable of depositing weld metal with a
maximum diffusible hydrogen content of 8 ml/100g
(H8), when tested according to AWS A4.3.
For stick electrode welding only
Based on AWS Specification D1.1
Col 1.
32ºF (2)
150ºF
225ºF
300ºF
Low Hydrogen Electrodes
Col. 2 Col. 3
32ºF (2) 50ºF
50ºF 150ºF
150ºF 225ºF
225ºF 300ºF
-35-
(1)
Col. 4
32ºF (2)
32ºF (2)
32ºF (2)
32ºF (2)