Renson International offers a comprehensive range of high-quality, high-performance Engine Valves for a wide variety of Internal Combustion Engines. As one of the most critical and precision-engineered components of an engine, our valves are manufactured using advanced electrically actuated upsetting, hydraulic forging, and precision machining processes to achieve the required shape, dimensional accuracy, and performance.
Throughout the manufacturing cycle, our Engine Valves undergo rigorous inspection and testing to meet stringent O.E. standards. Our quality-focused manufacturing processes ensure high reliability, durability, and consistent performance under demanding operating conditions.
With over 45 years of experience in manufacturing and supplying Engine Valves, Renson International has established itself as a trusted supplier to customers across global markets. Our extensive portfolio includes 2,500+ valve designs covering 150+ engine brands, serving applications across automotive, commercial vehicles, agricultural, industrial, and other engine segments.
We manufacture Engine Valves using a wide range of high-grade materials, including Martensitic Steels, Austenitic Steels, and Super Alloys such as Inconel and Nimonic, selected according to the specific application and operating requirements.
Valve Sizes
-
STEM DIA
4.50mm to 13.00mm
-
HEAD DIA
17.00mm to 60.00mm
-
OVERALL LENGTH
60.00mm to 300.00mm
Material Chart
Most commonly used Martensitic and Austenitic Steel grade for Manufacturing Engine Valves are listed below,
| SAE |
BS |
JIS |
DIN |
Tensile N/MM2 |
C |
Si |
Mn |
Ni |
Cr |
Mo |
N |
| SIL1 |
EN 52 |
SUH 1 |
1.4718 |
900-1100 |
0.40-0.50 |
3.00-3.50 |
0.60-MAX |
0.60-MAX |
7.50-9.50 |
-- |
-- |
| -- |
-- |
SUH 3 |
1.4731 |
880 |
0.35-0.45 |
1.80-2.50 |
0.60-MAX |
0.60-MAX |
10.00-12.00 |
0.70-1.30 |
-- |
| -- |
-- |
SUH 11 |
-- |
900-1100 |
0.45-0.55 |
1.00-2.00 |
0.60-MAX |
0.60-MAX |
7.50-9.50 |
-- |
-- |
| EV-12 |
21-2N |
-- |
1.4875 |
900-1150 |
0.50-0.60 |
0.08-0.25 |
7.00-9.50 |
1.50-2.75 |
19.25-21.50 |
-- |
0.20-0.40 |
| EV-8 |
21-4N |
SUH 35 |
1.4871 |
900-1150 |
0.48-0.58 |
0.35 MAX |
8.00-10.00 |
3.25-4.50 |
20.0-22.50 |
-- |
0.35-0.50 |
| EV-15 |
23-8N |
-- |
1.4866 |
850 |
0.28-0.38 |
0.50-1.00 |
1.50-3.50 |
7.00-9.50 |
22.00-24.00 |
-- |
0.25-0.40 |
| EV-4 |
21-12N |
SUH 37 |
-- |
800 |
0.15-0.25 |
1.00 MAX |
1.00-1.60 |
10.00-12.00 |
20.50-22.50 |
-- |
0.15-0.35 |
| INCONEL-751 |
|
|
0.10 MAX |
0.50 MAX |
1.00 MAX |
AVG |
14.0-17.0 |
Ti/AL 2.2/1.0 |
FE 7.0 |
| NIMONIC-80A |
|
|
0.10 MAX |
1.00 MAX |
1.00 MAX |
AVG |
18.0-21.0 |
Ti/AL 2.0/1.5 |
FE/CO 5.0/2.0 MAX |
Stellite Grade
Commonly used Stellite grade for Seat hardening and Tip Hardening are as follows,
| Stellite Grade |
C |
CR |
Ni |
W |
FE |
CO |
Hardness (HRC) |
| STELLITE #1 |
2.5 |
30.0 |
3.0 MAX |
12.0 |
3.0 MAX |
BAL |
50/54 |
| STELLITE #6 |
1.00 |
28.0 |
3.0 MAX |
4.0 |
3.0 MAX |
BAL |
40/44 |
| STELLITE #12 |
1.35 |
29.0 |
3.0 MAX |
8.0 |
2.0 MAX |
BAL |
45/47 |
| STELLITE #32 |
1.80 |
26.0 |
10.0 |
12.0 |
2.0 MAX |
BAL |
25/35 |