ERNiCrFe-11 Welding Wire
MIDALLOY ER630 BARE WIRE
CLASSIFICATION
• AWS 5.9 Class ER630 / ASME SFA 5.9 Class ER630
DESCRIPTION
• MIDALLOY ER630 bare welding wire is a precipitation hardening, martensitic stainless steel.
APPLICATIONS
• Typical applications include valves, fasteners, gears, propeller stafts, and roller chain pins.
TYPICAL CHEMISTRY
C |
Mn |
Si |
Cr |
Ni |
Mo |
Cu |
Cb+Ta |
S |
P |
Fe |
0.03 |
0.54 |
0.45 |
16.49 |
4.78 |
0.2 |
3.6 |
0.22 |
0.021 |
0.017 |
BAL. |
TYPICAL MECHANICAL PROPERTIES*
TENSILE STRENGTH |
150,000 PSI |
YIELD STRENGTH |
135,000 PSI |
ELONGATION IN 2” |
10% |
*Note: Mechanical properties listed reflect a post weld heat treatment between 1875°F and 1925°F for one hour, followed by precipitation hardening between 1135°F and 1165°F for four hours.
WELDING PARAMETERS
PROCESS |
DIAMETER |
VOLTAGE |
AMPERAGE |
GAS |
TIG |
1/16” |
14-18 |
90-130 |
Ar |
3/32” |
15-20 |
120-175 |
Ar |
|
1/8” |
15-20 |
150-220 |
Ar |
|
MIG |
.035” |
26-29 |
150-180 |
Ar |
.045” |
28-32 |
180-220 |
Ar |
|
1/16” |
29-33 |
200-250 |
Ar |
OTHER INFORMATION
• Welding of 17/4 plate under 4” thick can be done without preheating, but interpass temperatures up to 300°F are commonly specified.
• With thickness of 17/4 plate exceeding 4”, preheating to 200°F and maintenance of an interpass temperature of 200°F - 500°F is considered necessary in many applications.
• In welding maintain a short arc and keep the heat input low.
• Use stringer beads, avoid wide weaving, avoid stress raisers such as sharp corners, threads, and partial penetration welds.
STANDARD PACKAGING
• TIG 10 lb. tube / 60 lb. carton
• MIG 30 lb. spool
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