Sanmac® 4435 Bar

Datasheet updated

2022-06-30 10:48
(supersedes all previous editions)

Sanmac® 4435 is a molybdenum-alloyed (min. 2.5%) austenitic chromium-nickel steel with improved machinability.

Standards

  • ASTM: 316L, 316
  • UNS: S31603, S31600
  • EN Number: 1.4435, 1.4436
  • EN Name: X 2 CrNiMo 18-14-3, X 3 CrNiMo 17-13-3
  • W.Nr.: 1.4435, 1.4436
  • JIS: SUS316, SUS316L

Standards

Product standards

  • EN 10088-3, EN 10088-5 (dimensions up to 250 mm)
  • EN 10272, EN 10222-5, AD-2000-W2
  • ASTM A479, ASTM A276
  • Chemical composition and mech.properties acc ASTM A182
  • Basler Norm 2-1997

Approval

  • TÜV AD-Merkblatt W0/TRD 100
  • Pressure Equipment Directive (2014/68/EU)
  • JIS Approval for Stainless Steel Bars
  • Ü-Zeichen

Certificate

  • Status according to EN 10 204/3.1

Chemical composition (nominal)

Chemical composition (nominal) %
C Si Mn P S Cr Ni Mo
≤0.030 0.4 1.7 ≤0.040 ≤0.025 17.5 12.5 2.6

Chemical composition (nominal) %

C Si Mn P S Cr Ni Mo
≤0.030 0.4 1.7 ≤0.040 ≤0.025 17.5 12.5 2.6

Applications

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Corrosion resistance

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Forms of supply

Finishes and dimensions

Sanmac® 4435 bar steel is stocked in a large number of sizes. The standard size range for stock comprises 75-350 mm. Round bar is supplied in solution annealed and peel turned condition.

Lengths

Bars are delivered in random lengths of 3-7 m, depending on diameter.

Straightness
Diameter Height of arch, Typical value
mm mm/m
20 - 70 1
> 70 2

Tolerances

H12-h15 is valid.

Surface conditions
Surface conditions Ra, Typical value Size, diameter
µm mm
Peeled and polished 1 20-300
Peel turned 2 >300

Heat treatment

Sanmac® 4435 bar is delivered in solution annealed condition. Billets are delivered in hot-worked condition. If another heat treatment is needed after further processing the following is recommended.

Solution annealing

1040–1100°C (1900–2010°F), rapid cooling in air or water.

Mechanical properties

Bar steel is tested in delivery condition.

At 20°C (68°F)

Metric units
Proof strength Tensile strength Elong. Contr. HB
Rp0.2a) Rp1.0 a) Rm Ab) Z
MPa MPa MPa % %
≥205 ≥240 515-690 ≥40 ≥50 ≤215
Imperial units
Proof strength Tensile strength Elong. Contr. HB
Rp0.2a) Rp1.0 a) Rm Ab) Z
ksi ksi ksi % %
≥29.5 ≥34.5 74.5-100.1 ≥40 ≥50 ≤215

1 MPa = 1 N/mm2
a) Rp0.2 and Rp1.0 correspond to 0.2% offset and 1.0% offset yield strength respectively.
b) Based on L0 = 5.65 √S0 where L0 is the original gauge length and S0 the original cross-section area.

Impact strength

Due to its austenitic microstructure, SANMAC® 4435 has very good impact strength both at room temperature and at cryogenic temperatures.
Tests have demonstrated that the steel fulfils the requirements according to the European standards prEN 13445-2 (UFPV-2) ( (min. 60 J (44 ft-lb) at -270 oC (-455 oF) and EN 10272 (min. 60 J (44 ft-lb) at -196 oC (-320 oF).

At high temperatures

Metric units
Temperature Proof strength Tensile strength
Rp.02 Rp1.0 Rm
°C MPa MPa MPa
min. min. min.
100 165 200 420
200 137 165 380
300 119 145 370
400 108 135 -
500 100 128 -
Imperial units
Temperature Proof strength Tensile strength
Rp.02 Rp1.0 Rm
°F ksi ksi ksi
min. min. min.
200 23.9 29.0 60.9
400 19.9 23.9 55.1
600 17.3 21.0 53.7
800 15.7 19.6 -
1000 14.5 18.6 -

Physical properties

Density: 8.0 g/cm3 , 0.29 lb/in3

Thermal conductivity
Temperature Temperature
°C W/m °C °F Btu/ft h °F
20 14 68 8
100 15 200 8.5
200 17 400 10
300 18 600 10.5
400 20 800 11.5
500 21 1000 12.5
600 23 1100 13
Specific heat capacity
Temperature Temperature
°C J/kg °C °F Btu/lb °F
20 485 68 0.11
100 500 200 0.12
200 515 400 0.12
300 525 600 0.13
400 540 800 0.13
500 555 1000 0.13
600 575 1100 0.14
Thermal expansion 1)
Temperature Temperature
°C Per °C °F Per °F
30-100 16.5 86-200 9.5
30-200 17 86-400 9.5
30-300 17.5 86-600 10
30-400 18 86-800 10
30-500 18 86-1000 10
30-600 18.5 86-1200 10.5
30-700 18.5 86-1400 10.5

1) Mean values in temperature ranges (x10-6)

Modulus of elasticity 1)
Temperature Temperature
°C MPa °F ksi
20 200 68 29.0
100 194 200 28.2
200 186 400 26.9
300 179 600 25.8
400 172 800 24.7
500 165 1000 23.5

1) x103

Welding

The weldability of Sanmac® 4435 is good. Suitable methods of fusion welding are manual metal-arc welding (MMA/SMAW) and gas-shielded arc welding, with the TIG/GTAW method as first choice.

Since this material is alloyed in such a way to improve its machinability, the amount of surface oxides on the welded beads might be higher compared to that of the standard 316L steels. This may lead to arc instability during TIG/GTAW welding, especially welding without filer material. However, the welding behavior of this material is the same as for standard 316L steels when welding with filler material.

For Sanmac® 4435, heat input of <2.0 kJ/mm and interpass temperature of <150°C (300°F) are recommended. Preheating and post-weld heat treatment are normally not necessary.

Recommended filler metals

TIG/GTAW or MIG/GMAW welding

ISO 14343 S 19 12 3 L / AWS A5.9 ER316L (e.g. Exaton 19.12.3.L)

MMA/SMAW welding

ISO 3581 E 19 12 3 L R / AWS A5.4 E316L-17(e.g. Exaton 19.12.3.LR)

Hot working

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Machining

Sanmac is our trademark for the Alleima machinability concept. In SANMAC materials, machinability has been improved without jeopardizing properties such as corrosion resistance and mechanical strength.

The improved machinability is owing to:

  • optimized non-metallic inclusions
  • optimal chemical composition
  • optimized process and production parameters

Detailed recommendations can be find in S-02909-ENG. If priority are given to high production rate in machining Sanmac 316/316L (EN 1.4401/1.4404) is recommended instead of Sanmac® 4435 due to a more suitable chemical composition. Sanmac® 4435 is a machinability improved material with the same reliable machinability as Sanmac® 316/316L (EN 1.4404/1.4404) but with a little shorter expected tool-life.

Turning of Sanmac® 4435

Recommended insert and cutting data (starting values) is available in S-02909-ENG.

Disclaimer: Recommendations are for guidance only, and the suitability of a material for a specific application can be confirmed only when we know the actual service conditions. Continuous development may necessitate changes in technical data without notice. This datasheet is only valid for Alleima materials.