Stainless Steel 316L (UNS S31600)

SPECIFICATIONS: GRADE 316 / 316L | UNS S31600 / 31603 | ASTM/ASME A240 | Werkstoff 1.4404 / 04

All 316L at wilsonpipeline Pipe is certified to 316/316L which we stock at our warehouse in the CN with the capabilities to supply directly to countries across the world in all Stainless Steel Flanges, Stainless Steel Pipe Fittings, and Stainless Steel Pipe.

Stainless Steel 316L is the standard molybdenum bearing grade. It has an extensive variety of uses especially in marine applications due to the materials high corrosion resistance.

This stainless steel is popular for use in severely corrosive environments due to the materials immunity from boundary carbide precipitation. The material is widely used in heavy gauge welded components and weld annealing is only required where the material is for use in high stress environments.

Technical Information:

Stainless steel 316L (all) is one of the basic grade of the stainless steel range. 2% molybdenum bearing ensures better corrosion resistance than CLC 18-9L grade, particularly regarding to uniform and localised corrosion.

Stainless steel 316L is an austenitic microstructure grade, free of deleterious carbide precipitations in grain boundaries. The grade contains some residual ferrite (3%) after solution annealing (1050-1150°C – 1922-2102°F) and water quenching. Chemistry and heat treatments may be optimised in order to control the ferrite content.

Stainless steel 316L resists to wet atmosphere or room temperature solutions containing some chloride or fluoride additions. The steel is not seawater resistant. The alloy may be used in diluted sulphuric acids at low temperature (≤ 330°C – 626°F) as well as in sour organic solutions.

The grade is also well known for its higher ductility, particularly when considering cold forming.

Typical values (weight %)
C	Cr	NI	Mo	N	Others
0.020	17	10.5	2.1	0.05	–
PREN (%Cr+3.3%Mo+16%N) ≥ 24

Tensile properties after water quenching
°C	°F	Minimum guaranteed values *						Typical values						El %
		Y.S. 0.2%		Y.S. 1%		UTS		Y.S. 0.2%		Y.S. 1%		UTS
		MPa	Ksi	MPa	Ksi	MPa	Ksi	MPa	Ksi	MPa	Ksi	MPa	Ksi
20	68	220	32	260	38	520/670	76/98	310	44	350	51	680	85	45
100	212	166	24	199	29	430	63	280	40	330	48	490	72	43
200	392	137	20	167	24	390	57	200	28	230	33	450	66	35
300	572	118	17	145	21	380	56	175	25	200	30	440	64	35
400	752	108	16	135	20	380	56	450	22	180	29	430	63	30
500	932	100	15	128	19	360	52	135	19	165	24	410	60	30

* Following EN 10088 hot rolled plates – The EN guaranteed values are valid for a thickness from 5-75mm.

Impact values
°C	-196*	-196	+20	θ (°C)	450	550	650	700	750	800	850
°F	-452*	-320	68	θ (°F)	842	1022	1202	1292	1382	1472	1562
KCV (J/cm²) Minimum	75	125	187	Ageing H	2000	2000	2000	2000	500	500	500
KCV (J/cm²) Typical	125	250	312	KCU J/cm²	230	245	155	140	140	145	165

* Optimised heats with extra low ferrite.

Interval temper °C	Thermal expansion αx10-6K-1	°C	°F	Resistivity (µΩ cm)	Thermal conductivity (W.m-1.K-1)	Specific heat (J.kg-1.K-1)	Young modulus E (GPa)	Shear modulus G (GPa)
20-100	16	20	68	75	15	500	200	77
20-200	16.5	100	212	80	16	500	194	74
20-300	17	200	392	85	17.5	520	188	70.5
20-400	17.5	300	572	92	19	530	172	66.5
20-500	18	400	752	95	20.5	540	172	62.5
		500	932	100	22	540	165	59.5

Magnetic permeability: 1.015-1.050 (skin).

Quality corrosion tests guaranteed (special request may be discussed)
TEST	Other name	Corrosion (1)	Results
ASTM A 262 A		Intergranular	Step or dual structure
ASTM A 262 B	STREICHER	Intergranular	≤ 1mm/year (not sensitived)
ASTM A 262 C	HUEY	Intergranular	< 0,6mm/year*
ASTM A 262 E DIN 50914 RCCM	STRAUSS	Intergranular	No cracking after bending
ASTM G48 A		Pitting	Not recommended (typical CCT 5°)
ASTM G48 B	ASTM G78	Crevice	Not recommended (typical CCT 5°)

(1) kind of corrosion mechanism investigated

* Using low ferrite grade.

• Wet corrosion resistance properties in medium severe conditions
• Chemical industry (industrial phosphoric acid; Concentration < 30% P205 without abrasion; θ <60°C – 140°F)
• Food and beverage processing industry
• Water treatment
• Rail and road containers and tanks
• Household appliances
• Building decoration

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