bstp

TP 317L,UNS S31703,1.4438,X2 CrNiMo 18-15-4
Material No.	1.4438
EN symbol	X2 CrNiMo 18-15-4
AISI/SAE	317L
UNS	S31703
AFNOR	Z3CND19-15-04
B.S.	317S16
Standards	----

Description

Alloy 317L is a molybdenum containing, low carbon austenitic stainless steel with increased additions of chromium, nickel, and molybdenum for better corrosion resistance and increased resistance to chemical attack for sulfurous, acetic, formic, citric, and tartaric acids. Due to its low carbon content, 317L also provides resistance to sensitization when welded and higher creep, stress to rupture, and tensile strength at elevated temperatures. It is non-magnetic in the annealed condition but may become slightly magnetic after welding.

Chemical composition (%)

	C	Mn	P	S	Si	Ni	Cr	Mo	Ti	N	Nb
TP317L	0.035	2.00	0.045	0.030	1.00	11.0-15.0	18.0-20.0	3.0-4.0		<0,1
1.4438	0.030	2.00	0.045	0.015	1.00	13.0-16.0	17.5-19.5	3.0-4.0

Mechanical Properties:

Grade	Tensile Strength	Yield Strength 0.2%	Elongation -% in 50 mm (min.)	Hardness	Hardness
Grade	ksi (min.)	Offset ksi (min.)	Elongation -% in 50 mm (min.)	(Brinell) MAX	(Rockwell B) MAX
TP317L	75	30	35	217	90
1.4438	75	30	40	217	90

Convert ksi to Mpa Formula: ksi/0.1450377

Welding filler for welded pipe & tube

*All common fusion and resistance methods, with the exception of oxyacetylene welding, have proven successful
*AWS E317L/ER317L filler metal or austenitic, low carbon filler metals with molybdenum content higher than that of Type 317L, or a nickel-base filler metal with sufficient chromium and molybdenum content to exceed the corrosion resistance of Type 317L should be used to weld Type 317L steel

Main fields of application(depending on the specific conditions of use)

Alloy 317L is commonly used to handle sulfur, pulp liquor, acid dyestuffs, acetylating and nitrating mixtures, bleaching solutions, severe coal and oil, and many chemical compounds. Some other applications that use alloy 317L include:

Paper and pulp handling equipment
Chemical and petrochemical processing equipment
Condensers in fossil and nuclear fueled power generation stations
Food processing equipment
Textile equipment

TP317L,UNS S31703,1.4438,X2 CrNiMo 18-15-4