*myaeroexpo

Catalogs
SANDVIK MATERIALS TECHNOLOGY
STAINLESS STEELS FOR MACHINING

STAINLESS STEELS FOR MACHINING

Product catalog summary

Overview
Sanmac® stainless steels are engineered to improve machining efficiency and production economy. Developed by Sandvik Materials Technology and Sandvik Coromant, these steels enhance tool wear resistance and cutting speeds, boosting productivity and reducing costs.

Productivity Benefits

Increased cutting speeds and feed rates.
Lower fixed costs per machined component.
Extended tool life due to reduced wear.
Improved machine utilization with less downtime.

Product Offerings
Stainless Bar Steel

Includes grades like Sanmac 316/316L, 329, 2205, etc.
Available in various dimensions and finishes.
Complies with standards such as EN10088-3, ASTM A479, and NACE MR 0175.

Stainless Hollow Bar

Includes grades like Sanmac 304/304L, 316/316L, 2205, etc.
Available in lengths from 2.5 to 6.5 meters.
Complies with PED/2014/68/EU standards.

Technical Properties

Data available in metric and imperial units.
Corrosion resistance is a key feature.

Machining Guide

Covers techniques for turning, thread cutting, drilling, milling, and sawing.
Aims to reduce tool wear and improve machining efficiency.

Applications

Used in industries like chemical, petrochemical, power, marine, automotive, and food and beverage.
Applications include valves, pumps, axles, mechanical seals, etc.

Conclusion
Sanmac stainless steels offer significant advantages in machining applications, enhancing productivity, reducing costs, and improving service capabilities. The variety of grades and dimensions ensures suitability for diverse industrial applications.

Specifications
Specifications for hollow bars include guaranteed component sizes for lengths up to 2.5 times the outside diameter (O.D.). Standards and certifications for different grades like Sanmac 304/304L, 316/316L, and 2205 are listed, referencing standards like EN 10216-5, ASTM A-511, and NACE MR-0175/ISO 15156.

Standards
Test certifications for hollow bars in stock include compliance with PED 2014/68/EU and various EN and ASTM standards. Specific tests like the IC-test EN ISO 3651-2A and corrosion tests according to ASTM G-48 A are mentioned.

Hollow Bar Standard Stock Program
Includes tables listing dimensions, weights, and guaranteed component sizes for various grades of hollow bars, specifying maximum O.D. and minimum I.D. in both metric and imperial units, along with availability status.

Mechanical and Physical Properties
Details mechanical properties like proof strength, tensile strength, elongation, and hardness for different Sanmac grades at 20°C. Physical properties like density, modulus of elasticity, specific heat capacity, thermal conductivity, and thermal expansion are also provided.

Resistance to Corrosion
Evaluates resistance of various steel types to different acids and corrosion types, using a rating system from less resistant to more resistant.

Weldability
Discusses suitable welding methods for Sanmac grades, emphasizing correct welding current settings, especially for TIG welding. Recommendations for filler metals are provided.

Machining Guide
Highlights challenges of machining austenitic and duplex stainless steels due to high ductility and work hardening. Explains how Sanmac materials improve machinability through non-metallic inclusions and provides recommendations for cutting fluids and tool usage.

Introduction
Stainless steels, particularly austenitic and duplex types, exhibit significant work hardening compared to carbon steel or ferritic and martensitic stainless steels. Recommendations for improving machinability and cutting data for various stainless steel grades are provided.

Machinability Recommendations

Use modern cutting tools with appropriate geometries for austenitic and duplex stainless steels.
Regularly change inserts to prevent severe work hardening.
Consider high-pressure cutting fluids to enhance chip-breaking and tool life.
Contact Sandvik Coromant for details on high-pressure coolant cutting tools.

Strength and Stability

High strength and ductility in austenitic and duplex stainless steels complicate chip breaking and increase vibration risks.
Use stable machines and ensure proper workpiece securing with stable tool holders.
Minimize tool overhang, especially in drilling and internal turning.
For vibrations, use tools with a small nose radius, though this may increase plastic deformation risk.

Cutting Data Recommendations
Recommendations are based on machining with modern CNC machines. Adjustments to cutting data should be minimal, focusing on feed changes. Recommended tool life is 10–15 minutes.

Turning
Diagrams provide cutting data ranges for achieving a tool life of 10 minutes or more for austenitic Sanmac® materials and 7 minutes or more for duplex Sanmac 2205. The diagrams help optimize cutting data based on wear mechanisms.

Tools
Sandvik Coromant M-Line tools, including T-Max® P, CoroTurn® 107, and CoroTurn® 111, are optimized for stainless steel turning.

Types of Wear

Flank and notch wear: Reduce cutting speed and choose more wear-resistant insert grades.
Plastic deformation: Choose more wear-resistant insert grades and reduce cutting speed and feed.
Built-up edge: Increase cutting speed.
Edge frittering (chipping): Choose tougher insert grades and stronger edge inserts.

Thread Cutting and Turning
Indexable inserts are recommended for external thread cutting. Radial infeeds and generous cutting fluid flow are advised for thread turning in austenitic and duplex stainless steels.

Drilling
Recommendations for drilling methods are provided for different diameter ranges, emphasizing cost-effectiveness and tool life.

Milling
Dry milling is preferred for austenitic and duplex stainless steels to avoid thermal cracking. If cutting fluid is necessary, reduce cutting speed by 40-60%.

Parting-off and Grooving
Recommendations apply to most grooving operations in stainless steel materials, with feed chosen according to groove width.

1. Cutting Tools and Inserts

Various geometries for T-Max Q-Cut and CoroCut systems are recommended to prevent vibrations and handle unstable conditions.
Cutting data includes feed rates and cutting speeds for different materials like austenitic, duplex, and super-duplex steels.

2. Sawing Techniques

Band sawing and cold sawing are suitable for Sandvik steels, with cold sawing preferred for smooth surfaces and small sections.
Bimetal blades are cost-effective for stainless steel, while cemented carbide tipped blades offer high productivity.
Tooth pitch should be selected based on material dimensions.

3. Steel Grades and Specifications

Detailed chemical compositions and mechanical properties are provided for various Sandvik steel grades, including austenitic, duplex, and high-alloy stainless steels.
Each grade is listed with its corresponding standards, pressure purposes, and mechanical properties like proof strength, tensile strength, and elongation.

4. Recommendations and Notes

Guidance is provided for selecting cutting speeds and removal rates, especially for duplex and super-duplex steels.
Continuous development may lead to changes in technical data without notice.

5. Additional Resources

The Sandvik bar converter tool is available to help estimate savings by switching to Sanmac hollow bar.
Contact information for Sandvik Materials Technology is provided for further inquiries.

Catalog excerpts

SANMAC BAR AND HOLLOW BAR STAINLESS STEELS FOR MACHINING

Open the catalog to page 1

PRODUCT OFFER-STAINLESS BAR STEEL 7 PRODUCT OFFER - STAINLESS HOLLOW BAR 16 Technical data for bar and hollow bar (metric) 30 Technical data for bar and hollow bar (imperial) 32 The art of machining stainless steel 36 SANMAC IMPROVES YOUR PRODUCTION ECONOMY Sanmac ® is the result of extensive efforts to improve the machinability of stainless steel grades and the design of tooling concepts suitable for stainless steel machining. The result of this co-operation between Sandvik Materials Technology and Sandvik Coromant is improved production economy for you as our customer. Higher productivity The...

Open the catalog to page 2

SANMAC - ALWAYS AT THE CUTTING EDGE The benefits you will experience are: Improved cutting speeds and feed rates • Higher productivity per machine • Reduced fixed cost per machined component More machining time per insert edge due to less tool wear • Better machine utilisation through reduced stoppage time Integrated production (own melting) • Continuity from melt to melt • Less machine setting time and fewer rejections Excellent availability (from local stocks) • Reduced customer inventories • Reliable delivery service • Well established distributor network Wide selection of dimensions • Allows...

Open the catalog to page 3

PRODUCT OFFER STAINLESS BAR STEEL

Open the catalog to page 4

GRADES AND STANDARDS Stainless bar steel Sandvik®ENUNSAISI Stock standard Sanmac® 316 / 316L 1.4401 / 1.4404 S31600 / S31603 Type 316 / 316L Production order All stock standard grades can be produced on production order. Product standards (Applicable for both Production and Stock grades and sizes) EN10088-3 , EN 10222-51) AD2000-W23) ASTM A479, ASME SA479 NACE MR0103 ASTM A276, ASME SA 276 ASTM A-182 Size range, mm Inch Sanmac 304 / 304L Sanmac 316 / 316L Sanmac 4435 Sanmac 4571 Sanmac 3294) Sanmac 2205 / Sandvik SAF 2205™ Sandvik SAF 32760 Sandvik SAF 2507™_ Grade Sanmac 316 / 316L Sanmac 2205...

Open the catalog to page 5

SOLID BAR STANDARD STOCK PROGRAM Sandvik stainless round bars can be delivered in random or fixed lengths. Depending on size, the following surface finish is offered. • Peel turned and burnished (PTB) • = stock standard item, central warehouse • Peel turned (PT) O = produced to order (contact us about min.quantity)

Open the catalog to page 6

SOLID BAR STANDARD STOCK PROGRAM Sandvik stainless round bars can be delivered in random or fixed lengths. Depending on size, the following surface finish is offered. • = stock standard item, central warehouse O = produced to order (contact us about min.quantity) • Peel turned and burnished (PTB) • Peel turned (PT) • Rough machined (RM) Diameter Tolerance Random length, Surface mm inch mm inch m/feet Weight Sanmac® Sanmac

Open the catalog to page 7

Open the catalog to page 8

PRODUCT OFFER STAINLESS HOLLOW BAR

Open the catalog to page 9

GRADES AND STANDARDS Stainless hollow bar - grades Sandvik® UNS ASTM EN steel no. Produced to order Sanmac 4435 S31600/31603 316/316L 1.4436/1.4435 All above grades fulfill the requirements of PED/2014/68/EU (EN 10216-5) leak tightness test deferred to machined component Chemical composition Sandvik Nominal chemical composition, % Other grades to special order. Tolerances O.D. +2/-0% but minimum +1/-0 mm (+0.04/-0”). Straightness: Straightness deviation max. 1.5 mm per 1000 mm (0.059 inch per 3 ft). Other tolerances can be offered to special order. Lengths Sandvik stainless hollow bar is delivered...

Open the catalog to page 10

HOLLOW BAR STANDARD STOCK PROGRAM O.D. I.D. Weight Guaranteed component sizes 11 Chucked true to O.D. average O.D. I.D. O.D. I.D. mm mm kg/m lb/ft max. mm min mm max. inch min. inch 1.4307 Chucked true to I.D. Sanmac® Sanmac Sanmac

Open the catalog to page 11

Guaranteed component sizes 11 Chucked true to O.D. O.D. I.D. O.D. I.D. max. mm min.mm max. inch min. inch 1.4307 Chucked true to I.D. Sanmac® Sanmac Sanmac max. mm min.mm max. inch min. inch

Open the catalog to page 12

Open the catalog to page 13

O.D. I.D. Weight Guaranteed component sizes 11 EN EN EN 1.4307 Chucked true to O.D. Chucked true to I.D. Sanmac® Sanmac Sanmac mm mm kg/m lb/ft max. mm min mm max. inch min. inch max. mm min. mm max. inch min. inch • = Stock standard O = Produced to order. Minimum quantities from 750 to 5000kg (1500-11000 lbs) depending on size. "The values indicated are valid for lengths less than 2.5 times the outside diameter. Order examples THB-Sanmac 2205-250-200 (THB = Tube Hollow Bar)

Open the catalog to page 14

Steel type Sulph. Nitric Formic Acetic Pitting/ SCC acid acid acid acid crevice Sandvik® corr. Sandvik SAF 32760 ++ + +++ ++ +++++ +++++ Sandvik SAF 2507™ ++ + +++ ++ +++++ +++++ Sandvik Sanicro 28 +++++ ++ + ++ ++++ +++ + 0 = Reference value + = More resistant than reference value - = Less resistant than reference value WELDABILITY Suitable welding methods for Sanmac grades are manual metal arc welding with covered electrodes MMA and gas shielded arc welding, with the TIG and MIG methods as first choice. During TIG welding, especially autogenous welding, a correct setting of the welding current...

Open the catalog to page 18

THE ART OF MACHINING STAINLESS STEEL Austenitic and duplex stainless steels have certain properties that makes them difficult to machine compared to carbon steels or ferritic and martensitic stainless steels. The greatest difference is the high ductility of austenitic and duplex stainless steels, as well as their tendency to work harden and form built-up edges on the cutting tool. Moreover, in duplex materials, chip forming becomes more difficult due to the high strength of these materials. In Sanmac® materials, machinability has been improved without jeopardising properties such as corrosion...

Open the catalog to page 19