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Stainless Steel / 321/321 H ANN

321/321H is a general purpose austenitic stainless steel that is stabilized against carbide precipitation and designed to work within the carbide precipitation temperature range 427 to 816C (800 to 1500F). The H indicates a higher carbon content (0.04 0.10). It was developed for enhanced creep resistance and for higher strength at temperatures above 1000F (537C). The carbon content of the material enables dual certification listed as 321/321H. Alloy 321 cannot be hardened by heat treatment, only by cold working. It can be easily welded and processed by standard shop fabrication practices. It is non-magnetic in the annealed condition. The material is often used in Aerospace Piston Engine Manifolds, Chemical Processing, Expansion Joints, Food Processing, Petroleum Refining and Waste Treatment. (UNS S32100 & UNS S 32109)

Chemical Makeup

Element	Min	Max
Carbon, C	–	0.8
Manganese, Mn	-	2
Silicon, Si	-	1
Sulfur, S	-	0.03
Phosphorus, P	–	0.04
Chromium, Cr	17	19
Nickel, Ni	8	12
Copper, Cu	-	0.75
Molybdenum, Mo	3	0.75
Nitrogen, N	-	0.1

Common Applications

Aerospace
Industrial

Benefits

Corrosion Resistance
Easily Welded
High Creep & Stress Rupture Properties
Good Low Temperature Toughness

We stock 321/321 H ANN to the following specifications:

AMS-5645
AMS-QQ-S-763
ASME-SA-479
ASTM-A-193 GRD B8T CL 1
ASTM-A-276
ASTM-A-320 GRD B8T CL 1 (EXC. FLTS)
ASTM-A-479
ASTM-A-484
QQS-763

Click on a cross-section to see the sizes we stock:

Flat
hex
Round
Square

Stainless Steel
321/321 H ANN
Hex
22 sizes and conditions:

CD - Cold Drawn
1/4 - CD
3/8 - CD
7/16 - CD
1/2 - CD
9/16 - CD
5/8 - CD
11/16 - CD
3/4 - CD
13/16 - CD
7/8 - CD
15/16 - CD
1 - CD
1-1/8 - CD
1-1/4 - CD
1-3/8 - CD
1-1/2 - CD
1-9/16 - CD
1-5/8 - CD
1-3/4 - CD
1-7/8 - CD
2 - CD

Stainless Steel
321/321 H ANN
Flat
63 sizes and conditions:

CD - Cold Drawn HR&P - Hot Rolled and Pickled HR&P - Hot Rolled and Pickled
3/16 X 1 - CD
3/16 X 1-1/2 - CD
1/4 X 3/4 - HR&P
1/4 X 1 - HR&P
1/4 X 1-1/4 - HR&P
1/4 X 1-1/2 - HR&P
1/4 X 2 - HR&P
1/4 X 2-1/2 - HR&P
1/4 X 3 - HR&P
1/4 X 4 - HR&P
3/8 X 1/2 - CD
3/8 X 3/4 - HR&P
3/8 X 1 - HR&P
3/8 X 1-1/4 - HR&P
3/8 X 1-1/2 - HR&P
3/8 X 2 - HR&P
3/8 X 2-1/2 - HR&P
3/8 X 3 - HR&P
3/8 X 4 - HR&P
1/2 X 3/4 - HR&P
1/2 X 1 - HR&P
1/2 X 1-1/4 - HR&P
1/2 X 1-1/2 - HR&P
1/2 X 2 - HR&P
1/2 X 2-1/2 - HR&P
1/2 X 3 - HR&P
1/2 X 4 - HR&P
1/2 X 6 - HR&P
5/8 X 1 - HR&P
5/8 X 1-1/4 - HR&P
5/8 X 1-1/2 - HR&P
5/8 X 2 - HR&P
3/4 X 1 - HR&P
3/4 X 1-1/4 - HR&P
3/4 X 1-1/2 - HR&P
3/4 X 1-3/4 - HR&P
3/4 X 2 - HR&P
3/4 X 2-1/2 - HR&P
3/4 X 3 - HR&P
3/4 X 4 - HR&P
1 X 1-1/4 - HR&P
1 X 1-1/2 - HR&P
1 X 1-3/4 - HR&P
1 X 2 - HR&P
1 X 2-1/2 - HR&P
1 X 3 - HR&P
1 X 4 - HR&P
1 X 5 - HR&P
1-1/4 X 1-1/2 - HR&P
1-1/4 X 2 - HR&P
1-1/4 X 2-1/2 - HR&P
1-1/4 X 3 - HR&P
1-1/2 X 2 - HR&P
1-1/2 X 2-1/2 - HR&P
1-1/2 X 3 - HR&P
1-1/2 X 4 - HR&P
2 X 2-1/2 - HR&P
2 X 3 - HR&P
2 X 4 - HR&P
3 X 4 - HR&P
3 X 5 - HR&P
3 X 6 - HR&P

Stainless Steel
321/321 H ANN
Round
74 sizes and conditions:

CD - Cold Drawn CG - Centerless Ground CG - Centerless Ground HR RT - Hot Rolled Rough Turned HR RT - Hot Rolled Rough Turned
1/8 - CD
3/16 - CD
.1925 - CD
1/4 - CD
.255 - CD
5/16 - CD
.3175 - CD
3/8 - CD
7/16 - CD
1/2 - CD
.505 - CG
9/16 - CG
5/8 - CG
11/16 - CG
3/4 - CG
.755 - CG
13/16 - CG
7/8 - CG
15/16 - CG
1 - CG
1-1/16 - CG
1-1/8 - CG
1-3/16 - CG
1-1/4 - CG
1-5/16 - CG
1-3/8 - CG
1-7/16 - CG
1-1/2 - CG
1-9/16 - CG
1-5/8 - CG
1-3/4 - CG
1-7/8 - CG
2 - CG
2-1/8 - HR RT
2-1/4 - HR RT
2-3/8 - HR RT
2-1/2 - HR RT
2-5/8 - HR RT
2-3/4 - HR RT
2-7/8 - HR RT
3 - HR RT
3-1/8 - HR RT
3-1/4 - HR RT
3-3/8 - HR RT
3-1/2 - HR RT
3-5/8 - HR RT
3-3/4 - HR RT
4 - HR RT
4-1/8 - HR RT
4-1/4 - HR RT
4-3/8 - HR RT
4-1/2 - HR RT
4-3/4 - HR RT
5 - HR RT
5-1/4 - HR RT
5-1/2 - HR RT
5-3/4 - HR RT
6 - HR RT
6-1/4 - HR RT
6-1/2 - HR RT
6-3/4 - HR RT
7 - HR RT
7-1/2 - HR RT
8 - HR RT
8-1/2 - HR RT
9 - HR RT
10 - HR RT
12 - HR RT
13 - HR RT
14 - HR RT
15 - HR RT
16 - HR RT
18 - HR RT

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Chemical Makeup

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