General Characteristics
A normal-carbon, molybdenum-alloyed stainless steel that is widely used for various applications with higher than average corrosion resistance requirements. Forta 316/4401 is strengthened with temper rolling for applications that require specific strength.
Product Forms, Available Sizes and Finishes
Flat
| Product type | Finishes | Thickness | Width |
| Cold rolled coil | 2H | 0,05-6,00 | 3-1530 |
Cold rolled sheet | 2H | 0,25-6,00 | 100-1530 |
Precision strip | 2H | 0,05-1,50 | 3-630 |
Chemical Composition
The typical chemical composition for this grade is given in the table below, together with composition limits given for the product according to different standards. The required standard will be fully met as specified on the order.
The chemical composition is given as % by mass.
| C | Mn | Cr | Ni | Mo | N | |
Typical | 0.04 | 17.2 | 10.1 | 2.1 | ||
ASTM A240 | ≤0.08 | ≤2.00 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | ≤0.10 |
ASTM A240 | 0.04-0.10 | ≤2.00 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | |
ASTM A666 | ≤0.08 | ≤2.00 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | ≤0.10 |
EN 10028-7 | ≤0.07 | ≤2.00 | 16.5-18.5 | 10.0-13.0 | 2.00-2.50 | ≤0.10 |
IS 6911 | ≤0.08 | ≤2.00 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | ≤0.10 |
Corrosion Resistance
| Pitting corrosion resistance | Crevice corrosion resistance | |
PRE | CPT | CCT |
24 | 20±2 | <0 |
PRE Pitting Resistant Equivalent calculated using the formula: PRE = %Cr + 3.3 x %Mo + 16 x %NCPT Corrosion Pitting Temperature as measured in the Avesta Cell (ASTM G 150), in a 1M NaCl solution (35,000 ppm or mg/l chloride ions).CCT Critical Crevice Corrosion Temperature is the critical crevice corrosion temperature which is obtained by laboratory tests according to ASTM G 48 Method F
Standards & Approvals
The most commonly used international product standards are given in the table below.
| Standard | Designation |
ASTM A240/A240M | TYPE 316H / UNS S31609; TYPE 316H / UNS S31609 |
ASTM A666 | TYPE 316H / UNS S31609 |
EN 10028-7, PED 2014/68/EU | 1.4401 |
EN 10088-2 | 1.4401 |
EN 10088-3 | 1.4401 |
EN 10088-4 | 1.4401 |
IS 6911, AMENDMENT NO. 2 | ISS 316; ISS 316H |
