ASTM A403 WP316 Fittings

ASTM A403 WP316 fittings

ASTM A403 WP316 Buttweld Fittings

ASTM A403 WP316 Buttweld Fittings

ASME SA403 316 Seamless Fittings

ASME SA403 316 Seamless Fittings

A403 Grade WP316 Welded Fittings

A403 Grade WP316 Welded Fittings



ASTM A403 WP316 Fittings

Compare specifications SA 403 Grade 316 buttweld fittings with others suppliers

ASTM A403 WP316 fittings specifications






Contact directly ASTM A403 Grade wp316 pipe fittings manufacturer for custom sizes and types

Type of ASME A403 WP316 buttweld fittings


A403 Gr WP316 seamless fittings and UNS S31600 welded fittings for petrochemical plants as per ASME B16.9 standard

Maximum service temperatures of A403 WP316 fittings

Grade Alloying Elements (%) Maximum Service Temperatures In oC Source
AISI EN Cr Others
Austenitic types
ASTM A403 WP316 Fittings 1.4401 17 11 Ni, 2 Mo 870 ASTM


Learn about the ASME A403 WP316 weldable pipe fittings chemical composition, and mechanical properties of Werkstoff No 1.4401 butt welding fittings

A403 WP316 chemical composition

Grade C Mn Si P S Cr Mo Ni N
ASTM A403 WP316 Fittings Maximum 0.08 2.0 0.75 0.045 0.03 18.0 3.00 14.0 0.10
Minimum 0 16.0 2.00 10.0


SA403 WP316 seamless fittings mechanical properties

Grade Tensile Str
Yield Str
0.2% Proof
Rockwell B (Maximum) Brinell (Maximum)
ASTM A403 WP316 Fittings 515 MPa 205 MPa 95 (HR B) 217 (HB)


ASTM A403 Grade wp316 pipe fittings equivalent

UNS S31600
EN X5CrNiMo17-12-2
BS 316S31
AFNOR Z7CND17‐11‐02


Check corrosion environment of Inox AISI 316 seamless pipe fittings, and working temperatures of ASTM A403 Gr WP 316 weld fittings

A403 Gr WP316 welded fittings corrosion environment

Corrosion Environment ASTM A403 WP316 Fittings
Hydrochloric Acid (0.2% ) >Boiling
Sulfuric Acid (10% ) 122
Phosphoric Acid (85% ) 203
Nitric Acid (65% ) 212
Sodium Hydroxide (50% ) 194
Sulfuric Acid (60% ) <54
Nitric Acid (60% ) + Hydrochloric Acid (2%) >140


A403 WP316 corrosion resistance

Grade Composition (Weight%) PRE 1 N CCT2 °C (°F) CPT3 °C (°F)
N Cr Mo
ASTM A403 WP316 Fittings 0.05 16.5 2.1 24.2 -2.5


Working temperatures of ASTM A403 Gr WP 316 weld fittings

  • 1700–2200°F
  • 927–1204°C

Frequently Asked Questions (FAQs) –

What is the difference between seamless and welded ASTM A403 WP316 fittings?

Seamless Welded
Made from a single piece of raw material Made by joining two or more pieces
Have a higher strength Welding process like TIG or MIG welding
High temperature applications Low pressure applications


What are the common surface finishes of A403 Gr WP316 welded fittings?

  • Annealed and Pickled
  • Electro-polished
  • Brushed and Mirror
  • Highly polished

What is the maximum temperature that SA 403 WP316 pipe fittings can withstand?

  • 815°C in intermittent service
  • 927°C in continuous service

How do you maintain and clean ASTM A403 Grade wp316 weld fittings?

  • Use a soft-bristled brush
  • For stubborn stains or discoloration
  • Regularly inspect
  • Regularly clean