630 (174PH) SS 1/16 X 36 SS X 10LB PKG

ER630 (17-4PH) Stainless Steel GTAW (TIG) Welding Alloy


ER630 (17-4PH) stainless steel GTAW (TIG) welding alloy 1/16" x 36" x 10lb package


ER630 (17-4 PH) is a martensitic precipitation-hardening stainless steel that provides an outstanding combination of high strength, good corrosion resistance, good mechanical properties at temperatures up to 600°F (316°C), good strength in both base metal and welds, and short-time, low-temperature heat treatments that minimize warpage and scaling. 630 (17-4PH) is an outstanding choice for applications requiring high strength and hardness, as well as corrosion resistance. It is more cost effective than many high nickel non-ferrous alloys. ER630 (17-4PH) plate under 4“ can be welded without pre-heating, but interpass up to 300°F are commonly used. Conforms to ANSI/AWS A5.9.


  • Stainless steel ER630 (17-4PH) TIG welding rod is used to weld ASTM A 564 Type 630 alloys
  • This martensitic precipitation-hardening alloy can also be used on stainless steel
  • High strength, good corrosion resistance and good mechanical properties
  • 160,000 psi tensile strength (as welded)
  • 145,000 psi yield strength (as welded)
  • 5% elongation (as welded)
  • 108 HRB Rockwell B Hardness (as welded)
  • 327 HB Brinell Hardness (as welded)
  • Conforms to ANSI/AWS A5.9 & ASME SFA 5.9 ER 630, AMS 5825


Warning -

Cancer and Reproductive Harm -


What's Included

  • ER630 (17-4PH) stainless steel GTAW (TIG) welding alloy 1/16" x 36" x 10lb package

Warranty Information

  • 1 Year



Alloy Type Stainless Steel
Brinnell Hardness ANSI/AWS A5.9 & ASME SFA 5.9 ER 316
Chemical Composition Carbon 0.05% max.
Nickel 4.50-5.00%
Copper 3.25-4.00%
Phosphorus 0.03% max.
Molybdenum 0.75% max.
Chromium 16.0-16.75%
Manganese 0.25-0.75%
Silicon 0.75% max.
Sulfur 0.03% max.
Columbium/Tantalum 15-30%
Iron Remainder%
Classification ANSI/AWS A5.9
ASME SFA 5.9 ER 630, AMS 5825
Diameter 1/16"" (1.59mm)
Elongation 5% (as welded)
Material Stainless Steel
Tensile Strength (PSI) 160,000 psi (as welded)


Warranty 1 Year