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Stainless Steel · Plates · ASTM A240 / ASME SA240 321

SS 321 Stainless Steel Plates

In short: SS 321 plate to ASTM A240 is used for exhaust manifolds, furnace parts, expansion joints and heat exchangers that are welded and operate hot.

S32100
UNS number
7.93
density, g/cm³
3.1 / 3.2
EN 10204 certificates
6
SS 321 product forms
Quote SS 321 plates →Sizes and weights
SS 321 plate weight per m²Calculated at 7.93 g/cm³: 3 23.79 kg/m²; 5 39.65 kg/m²; 6 47.58 kg/m²; 8 63.44 kg/m²; 10 79.30 kg/m²; 12 95.16 kg/m²; 16 126.88 kg/m²; 20 158.60 kg/m²; 25 198.25 kg/m²; 30 237.90 kg/m²; 40 317.20 kg/m²; 50 396.50 kg/m². SS 321 plate weight per m²7.93 g/cm³ 3: 23.79 kg/m²35: 39.65 kg/m²56: 47.58 kg/m²68: 63.44 kg/m²810: 79.30 kg/m²1012: 95.16 kg/m²1216: 126.88 kg/m²1620: 158.60 kg/m²2025: 198.25 kg/m²2530: 237.90 kg/m²3040: 317.20 kg/m²4050: 396.50 kg/m²50 396.5 Thickness, mm · kg/m²
Calculated values for estimating; actual weights vary within tolerances.

Why this combination

Why SS 321 in plates

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

Welded plate fabrications that run in the sensitising range keep their corrosion resistance with 321's titanium stabilisation.

For creep-governed pressure parts, specify SS 321H plate.

Specification

How to specify SS 321 plates

Thickness about 3 – 150 mm (and heavier on request), widths 1,000 – 3,000 mm, lengths 2,000 – 12,000 mm; cut-to-size and profile-cut parts

SS 321 plates ASTM A240 / ASME SA240 321
SS 321 plates: ASTM A240 / ASME SA240 321
Specification
ASTM A240 / ASME SA240 321
UNS
S32100
EN / W.Nr.
1.4541
Finish
No. 1 hot-rolled, annealed and pickled

Sizes and weights

SS 321 plates sizes, weighed at 7.93 g/cm³

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

SS 321 plate weights at 7.93 g/cm³
Thickness mmkg/m²1,500 × 6,000 plate, kg2,000 × 6,000 plate, kg
323.8214285
539.7357476
647.6428571
863.4571761
1079.3714952
1295.28561,142
16126.91,1421,523
20158.61,4271,903
25198.31,7842,379
30237.92,1412,855
40317.22,8553,806
50396.53,5694,758
65515.44,6396,185
80634.45,7107,613
100793.07,1379,516

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 plates

What is SS 321 plate used for?

Exhaust components, expansion bellows, furnace parts and heat exchangers.

Is SS 321 plate weldable?

Yes; SS 347-type filler is often used.

From enquiry to dispatch

How a SS 321 plates 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 plates?

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

Request a quote →SS 321 grade page
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