Manufacturer, stockist and supplier · Supplying GCC, Southeast Asia, Europe, United States, United Kingdom & India

ramesh@brighttubes.in · +91 98200 74585

Stainless Steel · Bars · ASTM A276 / A479 321

SS 321 Stainless Steel Bars

In short: 321 bar to ASTM A276 or A479 is machined into fittings, valve parts and components for hot, welded systems.

S32100
UNS number
7.93
density, g/cm³
3.1 / 3.2
EN 10204 certificates
6
SS 321 product forms
Quote SS 321 bars →Sizes and weights
SS 321 round bar weightCalculated at 7.93 g/cm³: 6 0.22 kg/m; 8 0.40 kg/m; 10 0.62 kg/m; 12 0.90 kg/m; 16 1.59 kg/m; 20 2.49 kg/m; 25 3.89 kg/m; 32 6.38 kg/m; 40 9.97 kg/m; 50 15.57 kg/m; 63 24.72 kg/m; 75 35.03 kg/m; 90 50.45 kg/m. SS 321 round bar weight7.93 g/cm³ 6: 0.22 kg/m68: 0.40 kg/m810: 0.62 kg/m1012: 0.90 kg/m1216: 1.59 kg/m1620: 2.49 kg/m2025: 3.89 kg/m2532: 6.38 kg/m3240: 9.97 kg/m4050: 15.57 kg/m5063: 24.72 kg/m6375: 35.03 kg/m7590: 50.45 kg/m90 50.4 Round bar diameter, mm · kg/m
Calculated values for estimating; actual weights vary within tolerances.

Why this combination

Why SS 321 in bars

Titanium-stabilised: Ti ≥ 5×(C+N)Resists sensitisation in the 425–815 °C rangeHigher creep strength than SS 304LWelded with SS 347 filler

Bar for machined parts welded into SS 321 piping keeps the same stabilised chemistry at the joint.

Hex and round bar are the common shapes for fittings and studs.

Specification

How to specify SS 321 bars

Round bars about 3 – 500 mm diameter; hex 6 – 100 mm A/F; square and flat sections to order; lengths 3 – 6 m random or cut to size

SS 321 bars ASTM A276 / A479 321
SS 321 bars: ASTM A276 / A479 321
Specification
ASTM A276 / A479 321
UNS
S32100
EN / W.Nr.
1.4541
Shapes
Round, hex, square, flat

Sizes and weights

SS 321 bars sizes, weighed at 7.93 g/cm³

Other sizes on request. For general bars information, such as manufacturing routes and end finishes, see the bars guide.

SS 321 bar weights at 7.93 g/cm³ (kg/m)
Size mmRoundHex A/FSquare
60.2240.2470.285
80.3990.4400.508
100.6230.6870.793
120.8970.9891.142
161.5941.7582.030
202.4912.7473.172
253.8934.2924.956
326.3787.0328.120
409.96510.98812.688
5015.57117.16819.825
6324.72027.25731.474
7535.03438.62944.606
9050.44855.62664.233
10062.28268.67479.300
12597.316107.303123.906
150140.135154.516178.425
200249.128274.695317.200

Chemistry

SS 321 composition

UNS
S32100
EN / W.Nr.
1.4541 · X6CrNiTi18-10
Density
7.93 g/cm³
SS 321 Stainless Steel chemical composition, % (ASTM A240)
ElementLimit, %Why it matters
C0.08 max
Mn2.00 max
P0.045 max
S0.030 max
Si0.75 max
Cr17.0 – 19.0
Ni9.0 – 12.0
Ti5×(C+N) – 0.70
N0.10 max

Limits per ASTM A240; other product forms and specifications differ slightly. Your order's specification and edition govern.

0%5%10%15%20% Mn Cr Ni
Main alloying elements of SS 321 Stainless Steel: bars show the permitted range (ASTM A240).

Questions

About SS 321 bars

Is 321 bar used for bolting?

Yes, as B8T-type stainless bolting material.

Do you supply 321 bar cut to length?

Yes.

From enquiry to dispatch

How a SS 321 bars order runs

  1. 01 EnquiryGrade, specification, size, quantity
  2. 02 ReviewChecked against your standard
  3. 03 InspectPMI, dimensions, TPI if required
  4. 04 CertifyEN 10204 3.1 / 3.2, heat traceable
  5. 05 ShipPacked and documented for the destination

Need SS 321 bars?

Send size, quantity, specification and destination. We reply with availability, certificates and delivery.

Request a quote →SS 321 grade page
Request a Quote Call
WhatsApp