TP316, TP316L, SUS316, SUS316L capillary for medical tube,
electronic microtube, optical fiber accessories etc
TP316, TP316L, SUS316, SUS316L welded or seamless capillary.
2 EQUIVALENT DESIGNATION
UNS S31600, X5CrNiMo17-12-2, W.Nr. 1.4401, 0Cr17Ni12Mo2
UNS S31603, X2CrNiMo17-12-2, X2CrNiMo17-12-3, X2CrNiMo18-14-3,
W.Nr. 1.4404, 1.4432, 1.4435, 00Cr17Ni14Mo2
(1) Medical tubes such as syringes for injections, puncture
(2) All kinds of industrial tubes, small precision stainless steel
tubes, dispensing syringes.
(3) Temperature guide tube, electronic thermometer, thermocouple
protection tube, barbecue temperature probe tube, instrument
protection tube, sensor tube, barbecue rub tube, thermostat tube,
instrument tube, thermometer stainless steel tube, microbiological
(4) Core protector, pen holder
(5) Various electronic microtubes, optical fiber accessories,
(6) Horological industry, T-bars with studs or screws, watch belt
fittings, gem punches needle
(7) All kinds of antenna tubes, automobile tail antenna tubes, pull
rod antenna tubes, stretch rod, mobile phone stretch antenna tubes,
miniature antenna tubes, all kinds of stainless steel antenna.
(8) Stainless steel tubes for laser engraving equipment
(9) Fishing tackle pipe, fishing rod pipe
(10) All kinds of food and beverage industry pipe, feeding pipe
(11) Various stylus tubes, cell phone stylus, computer stylus tubes
TP316 is the second most widely used stainless steel after TP304,
mainly used in the food industry and surgical equipment, where
molybdenum is added to give it a special corrosion-resistant
structure. It is also used as "Marine steel" because it has better
resistance to chloride corrosion than TP304. TP316 stainless steel
contains good plastic, toughness, cold deformation and welding
process performance, also it has good high temperature strength.
TP316L has a slightly worse high temperature performance than
TP316, but its corrosion resistance is better than that of TP316.
Due to the low carbon content and the content of 2-3% molybdenum,
the corrosion resistance of reducing salts and various inorganic
acids and organic acid base salts is improved, meanwhile its high
temperature strength also improved. TP316L has lower carbon content
than SUS316, so it has better intergranular corrosion resistance
and higher high temperature creep strength than TP316.
(1) Cold rolled product has good appearance gloss
(2) Due to the addition of Mo(2~3%), corrosion resistance,
especially pitting resistance is excellent
(3) Excellent high temperature strength
(4) Excellent working hardenability (weak magnetism after
(5) Non-magnetic in condition of solid solution state.
(6) Good welding performance.
5 CHEMICAL COMPOSITION (wt%):
6 PHYSICAL CONSTANTS
|Grade||Density||Melting range||Electric resistivity ratio||Specific heat|
7 MECHANICAL PROPERTY
The material shall conform to the requirements as to tensile
properties specified in Table below.
These mechanical properties apply to tubing 1/8 in. (3.2 mm) and
larger in outside diameter by 0.015 in. (0.38 mm) in wall thickness
Smaller sizes are available meeting the minimum tensile strength
specified in Table 2; however, yield strength is not generally
determined on such sizes, and the minimum elongation shall be 25 %.
|Grade||Recommended heat treatment||Tensile strength σb MPa||Yield strength Rp0.2 %||Elongation δ5 %||Hardness|
|TP316||1010-1150°C rapid cooling||≥520A||≥205AB||≥35B||≤187HB|
|TP316L||1010-1150°C rapid cooling||≥520A||≥205AB||≥35B||≤187HB|
A Grades TP 316L shall have a minimum tensile strength of 70 ksi
(485 MPa) and a minimum yield strength of 25 ksi (170 MPa).
B Yield strength is not generally determined on tubing sizes
smaller than 1/8 in. (3.2mm) in outside diameter or thinner than
0.015 in. (0.38 mm) wall, so yield strength is not required on such
sizes. Also, the minimum elongation required on these smaller or
thinner sizes is 25 %.
8 HEAT TREATMENT
The purpose is to make the carbides fully dissolved and retained in
the austenite at room temperature, so as to obtain single phase
austenite microstructure at room temperature, so that the steel has
the highest corrosion resistance.
The heating temperature of solid solution treatment is generally
between 1010-1150°C, and is adjusted appropriately according to the
carbon content. Followed by fast cooling like water cooling.
All standard welding methods are available for welding. When
welding, 316Cb 316L or 309Cb stainless steel filler rod or
electrode can be used for welding according to the purpose.
In order to obtain the best corrosion resistance, the welding
section of 316 stainless steel needs to be annealed after welding.
For 316L stainless steel, no post-welding annealing required.
Tube blank → Peeling → Blanking → Heating → Hot piercing → Cooling
→ Finishing → Pickling → Lubricating
→ Cold rolling → Degrease → Heat treatment → Straightening → Tube
cutting → Pickling → Inspection → Packing.
Tube blank → Peeling → Blanking → Inner hole drilling → Lubricating
→ Cold rolling or drawing → Degrease
→ Bright annealing → Straightening → ID and OD surface polishing →
Inspection → Packing.
Permissible variations in dimensions
|Up to, but not including 3/32(0.094) in. (2.38 mm)||+0.002|
|3/32 (0.094) in. (2.38 mm) but not including 3/16 (0.188)in. (4.76
|3/16 to, but not including, 1/2(0.500) in. (12.70 mm)||+0.004|
11 FLARING TEST
A section of tube approximately 4 in.(101.6 mm) in length shall
stand being flared with a tool having a 60°included angle until the
tube at the mouth of the flare has been expanded to the following
percentages without cracking or showing flaws:
|Ratio of inside diameter to outside Diameter||Minimum expansion of inside diameter, %|
12 Hydrostatic, Air Underwater Pressure Test, or Nondestructive
Each tube shall be subjected to the hydrostatic test, air
underwater pressure test, or nondestructive electric test. The
type of test to be used shall be at the option of the manufacturer,
unless otherwise specified in the purchase order.
Each tube shall be subjected to a hydrostatic test at a test
pressure not exceeding 1000 psi (6.89MPa).
Air Underwater Pressure Test
Each tube shall be subjected to an air underwater pressure test, at
a test pressure as given by the following equation or 500 psi (3.4
MPa), whichever is less: P=2St/D
P = air pressure, psi or MPa
S = allowable fiber stress of 16,000 psi (110.3 MPa),
t = specified wall thickness, in. or mm, and
D = specified outside diameter, in. or mm.
Nondestructive Electric Test
Each tube shall be subjected to a nondestructive electric test that
is capable of detecting imperfections with a
depth exceeding 10 % of the wall thickness or 0.002 in. (0.05mm),
whichever is greater. Testing will not be required on sizes under
0.125 in. (3.18 mm) in outside diameter. However, at the option of
the purchaser, tubing to be drawn to a diameter under 0.125 in. may
be tested while in the range from 0.156 in. (3.97mm) to 0.125 in.
outside diameter, and any defects that are found shall be culled
out before any further reductions are made.
13 PRODUCT CAPACITY
Surface:2B, BA, Mirror, sandblasted surface, passive surface.
Annealing surface,fine drawing bright surface Ra≤0.8μm,finely
polished ID and OD Ra≤0.2-0.4μm. (possible Ra 0.1μm at request).
14 STANDARD SPECIFICATION
GB/T 3090 Stainless steel small diameter seamless steel tube
GBT 18457 Stainless steel needle for manufacturing medical
GB 4234 Stainless steel for surgical implants
YBT 4513-2017 Welded stainless steel tubes for medical gases and
ASTM A632 Standard Specification for Seamless and Welded Austenitic
Stainless Steel Tubing (Small-Diameter) for General Service
ISO 5832-1-2016 Implants for surgery metallic materials - Part 1
Wrought stainless steel
ISO 9626-2016 Stainless steel needle tubing for the manufacture of
medical devices requirements and test methods
SAE AMS 5643R Steel Corrosion Resistant Bar Wire Forging Tubing and
15 COMPETITIVE ADVANTAGE
(1) More than 50 years experience of research and develop in high
temperature alloy, corrosion resistance alloy, precision alloy,
refractory alloy, rare metal and precious metal material and
(2) 6 state key laboratories and calibration center.
(3) Patented technologies.
(4) High performance.
16 BUSINESS TERM
|Minimum order quantity||Negotiable|
|Packaging details||Water prevent, seaworthy transport, plastic box|
|Mark||As per order|
|Delivery time||60-90 days|
|Payment terms||T/T, L/C at sight, D/P|
|Supply ability||20 metric tons / Month|
Note: For more information of this material, please contact us
directly or visit our official web site http://www.cmmetal.cn.