NITRONIC® 40 (S21900 / S21904) Cr 21 Ni 6 Mn 9 (21-6-9)
High Performance Alloys stocks and
produces this grade in the following forms: Bar, sheet and plate. Request quote on this grade.
Overview
Nitronic 40 is a high-manganese stainless steel with high strength and excellent resistance to corrosion at high temperatures. Nitronic 40® can be fabricated and readily weldable. Nitronic 40® has been used for chemical processing, pollution control equipment and various aircraft engine components.
Applications
Chemistry
Chemical Requirements |
|
Ni |
Cr |
Mn |
C |
Si |
N |
S |
Max |
7.50 |
21.50 |
10.0 |
0.08 |
1.00 |
0.40 |
0.030 |
Min |
5.50 |
19.00 |
8.0 |
|
|
0.15 |
|
Tensile Data
Mechanical Property Requirements |
|
|
Ultimate Tensile, min. |
Yield Strength (0.2% OS) min. |
Elong. in 2 in., or 50mm, min., % |
R/A |
Hardness, max. |
Min |
95 KSi |
48 KSi |
35 |
|
|
Max |
|
|
|
|
241 Brinell |
Min |
655 MPa |
330 MPa |
|
|
|
Max |
|
|
|
|
100 Rockwell B |
Specifications
Form |
Standard |
Metal Type |
UNS S21900 XM-10 21-6-9 |
Bar |
AMS 5656 ASTM A276 / A479 / A314 |
Flat Bar |
|
Wire |
ASTM A580 |
| Sheet |
AMS 5595 / ASTM A412 |
Plate |
AMS 5595 / ASTM A412 |
| Foil |
ASTM A412 |
Fitting |
|
Tube |
AMS 5561 / AMS 5562 |
Forging |
ASTM A314 |
Weld Wire |
|
Weld Electrode |
|
Din |
|
Bar Sizes
| 1/4 |
CG |
| 5/16 |
CG |
| 3/8 |
CG |
| 7/16 |
CG |
| 1/2 |
CG |
| 9/16 |
CG |
| 5/8 |
CG |
| 11/16 |
CG |
| 3/4 |
CG |
| 13/16 |
CG |
| 7/8 |
CG |
|
| 15/16 |
CG |
| 1 |
CG |
| 1-1/8 |
CG |
| 1-3/16 |
CG |
| 1-1/4 |
CG |
| 1-5/16 |
CG |
| 1-3/8 |
CG |
| 1-1/2 |
CG |
| 1-5/8 |
CG |
| 1-3/4 |
CG |
| 1-7/8 |
CG |
|
| 2 |
CG |
| 2-1/4 |
CG |
| 2-1/2 |
CG |
| 3 |
CG |
| 3-1/2 |
CG |
| 4 |
RT |
| 4-1/2 |
RT |
| 5 |
RT |
| 6 |
RT |
| 8 |
RT |
|
Machining
| MACHINING DATA |
Carbide tools are suggested
for rates better than 50% of Type 304. |
| Machining Type |
Suggested starting rates are: |
| Single Point turning : |
Roughing - 0.15" depth, 0.015"/rev feed -175 SFM
Finishing - 0.025" depth, 0.007"/rev feed - 200 SFM |
| Drilling : |
1/4" Dia hole - 0.004"/rev feed - 60 SFM
1/2" Dia hole - 0.007"/rev feed - 60 SFM
3/4" Dia hole - 0.010"/rev feed - 60 SFM |
| Reaming : |
Feed - same as drilling - 100 SFM |
| Side and Slot Milling : |
Roughing - 0.25" depth - 0.007"/tooth feed - 125SFM
Finishing - 0.050" depth - 0.009"/tooth feed - 140SFM |
These rates are for carbide tools,
Type C-2 for roughing, drilling and reaming.
Type C-3 for finishing. |
NITRONIC® is a registered trademark of AK Steel
