TP316 / SUS316L Corrosion Resistant Stainless Steel Capillary Good Welding Performance

TP316, TP316L, SUS316, SUS316L capillary for medical tube, electronic microtube, optical fiber accessories etc

1 PRODUCT

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

3 APPLICATION

(1) Medical tubes such as syringes for injections, puncture syringes.

(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 engineering tube.

(4) Core protector, pen holder

(5) Various electronic microtubes, optical fiber accessories, optical mixer

(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

4 OVERVIEW

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.

Typical characteristics

(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 machining)

(5) Non-magnetic in condition of solid solution state.

(6) Good welding performance.

5 CHEMICAL COMPOSITION (wt%):

6 PHYSICAL CONSTANTS

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 and heavier.

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 %.

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

Solid solution

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.

Post-welding annealing

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.

9 PROCESS

Tube blank → Peeling → Blanking → Heating → Hot piercing → Cooling → Finishing → Pickling → Lubricating

→ Cold rolling → Degrease → Heat treatment → Straightening → Tube cutting → Pickling → Inspection → Packing.

OR

Tube blank → Peeling → Blanking → Inner hole drilling → Lubricating → Cold rolling or drawing → Degrease

→ Bright annealing → Straightening → ID and OD surface polishing → Inspection → Packing.

10 DIMENSION

Permissible variations in dimensions

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:

12 Hydrostatic, Air Underwater Pressure Test, or Nondestructive Electric Test

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.

Hydrostatic Test

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

where:

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

OD:0.25-8.0 mm

WT:0.065-3.0 mm

Concentricity: good

Straightness:≤1mm/m

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 machinery

GB 4234 Stainless steel for surgical implants

YBT 4513-2017 Welded stainless steel tubes for medical gases and vacuums

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 Rings (S17400)

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 products.
(2) 6 state key laboratories and calibration center.
(3) Patented technologies.

(4) High performance.

16 BUSINESS TERM

With background of more than 50 years of material R&D experience, CMMC is a high-tech enterprise specialized in production of high temperature alloys, corrosion resistant alloys, precision alloys, wear resistant alloys, refractory alloys and other special alloys.

With main smelting equipments by CONSARC, including vacuum induction melting furnace (VIM 3 metric tons x 1 set), inert gas protective electric slag remelting furnace (IG-ESR 5 metric tons x 1 set, 10 metric tons x 2 sets), vacuum arc remelting furnace (VAR 10 metric tons x 1 set), CMMC has an annual production capacity of 3000 metric tons.

Established in 2016, CMMC stll having an investing plan of more than 30 million U.S.Dollars in the coming 5 years. CMMC aspires to become an internationally renowned supplier and leading brand of key materials for core components of high-end equipments in the application fields of aerospace, clean energy, petroleum, chemical engineering, medical, marine engineering, food and automobile, etc.

Our main products include forgings, bars, rods, tubulars, plates, sheets, strips, wire rods, precision wires, etc.

From ultra-pure smelting, hot and cold forming, heat treatment, mechanical processing to finish machining, CMMC provides the whole process of one-stop professional services.

From demand idea to research and development, from technology innovation to promoting of products upgrading, from customer's puzzles and difficulties to final solution, from smelting to market, no matter wherever, whenever, whatever and however, CMMC always try to provide satisfactory one-stop service.

By providing better materials to make a better world, CMMC never give up the dream.