Quality and Safety Assurance

To uphold the company’s core values of integrity and reliability, Tien-I strives always to provide its clientele with tools of unsurpassed quality and meeting stringent safety standards. We have ISO 9001 and ROHS certification, and our factories have passed the Intertek Audit. Each member of our quality control team has undergone SGS training to ensure that every Tien-I product satisfies DIN, ISO and ANSI/ASTM international standards.

No wonder we won the Taiwan Excellence Award in 2016.

Seeing is believing. We would like to invite you to visit our factory and meet our quality control team.

Contact Tien-I

Our Certificate :

Our Lab Equipment :

Material source is the key to quality. Tien-I is a member of China Steel Corporation (CSC), the leading steel company in Taiwan.

We also collaborate with other excellent international steel companies, including Nippon Steel Corporation, to provide special alloy steel for your various designs.

Cr-Mo Steels

Standard			CHEMICAL COMPOSITION
JIS	ANSI	DIN	C	Si	Mn	P	S	Ni	Cr	Mo	V
SCM435	4130
SCM440	4140	42CrMo4	0.38-0.43	0.15-0.35	0.60-0.85	≦0.030	≦0.030	-	0.90-1.20	0.15-0.30	-

Carbon Steels

Standard			CHEMICAL COMPOSITION
JIS	ANSI	DIN	C	Si	Mn	P	S	Ni	Cr	tot	V
SWRCH8	1008		≦0.08	-	≦0.60	≦0.040	≦0.040	-	-	-	-
S15C	1015	CK15	0.13-0.18	0.15-0.35	0.30-0.60	≦0.030	≦0.035	-	-	-	-
S45C	1045	CK45	0.42-0.48	0.15-0.35	0.60-0.90	≦0.030	≦0.035	-	-	-	-

Alloy Tool Steels

Standard			CHEMICAL COMPOSITION
JIS	ANSI	DIN	C	Si	Mn	P	S	Ni	Cr	Mo	V
	S2 M		0.65-0.70	1.00-1.25	0.45-0.60	≦0.025	≦0.025	-	0.10-0.30	0.40-0.50	0.15-0.25

Free Cutting Steels

Standard			CHEMICAL COMPOSITION
JIS	ANSI	DIN	C	Si	Mn	P	S	Ni	Cr	Mo	Pb
SUM43	1144		0.40-0.48	-	1.35-1.65	≦0.040	0.24-0.33	-	-	-	-
S45CL	10L45		0.42-0.48	0.15-0.35	0.60-0.90	≦0.030	≦0.035	-	-	-	0.10-0.35

Medium-Carbon Alloy Steels

Standard			CHEMICAL COMPOSITION
JIS	CSC	DIN	C	Si	Mn	P	S	Ni	Cr	A1	V
	40ACR		0.40-0.44	≦0.10	0.60-0.90	≦0.030	≦0.030	-	0.20-0.40	≧0.010	-

CR-V

Standard			CHEMICAL COMPOSITION
JIS	ANSI	DIN	C	Si	Mn	P	S	Ni	Cr	Mo	V
	50BV30		0.27-0.33	≦0.10	0.70-1.00	≦0.030	≦0.035	-	0.30-0.50	＞0.0005	0.10-0.50

Ni-Cr-Mo Steels

Standard			CHEMICAL COMPOSITION
JIS	ANSI	DIN	C	Si	Mn	P	S	Ni	Cr	Mo	V
SNCM220	8620	21NiCrMo2	0.17-0.23	0.15-0.35	0.60-0.90	≦0.030	≦0.030	0.40-0.70	0.40-0.65	0.15-0.30	-
	8660+V		0.56-0.64	0.15-0.35	0.75-1.00	≦0.035	≦0.040	0.40-0.70	0.40-0.60	0.15-0.25	0.15-0.25

Spring Steels

Standard			CHEMICAL COMPOSITION
JIS	ANSI	DIN	C	Si	Mn	P	S	Ni	Cr	Mo	V
SUP10	6150	50CrV4	0.47-0.55	0.15-0.35	0.65-0.95	≦0.035	≦0.035	-	0.80-1.10	-	0.15-0.25

High C-Cr Steels (Bearing Steels)

Standard			CHEMICAL COMPOSITION
JIS	ANSI	DIN	C	Si	Mn	P	S	Ni	Cr	Mo	V
SUJ2	52100	100Cr6	0.95-1.10	0.15-0.35	≦0.50	≦0.025	≦0.025	-	1.30-1.60	-	-

Treating materials with heat alters its stability and, in some cases, its chemical properties. Suitable heat treatment can strike the perfect balance between cost and longevity.

Tien-I performs three main types of heat treatment:
- Continuous Furnace
- Batch Furnace
- Vacuum Furnace