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EXCEPTS FROM JIS STEEL TUBES SPECIFICATIONS JIS

參考資料

EXCEPTS FROM JIS STEEL TUBES SPECIFICATIONS JIS

JIS G3445 Carbon Steel Tubes Machine Structural Purpose

Class		Symbol	Chemical Composition%					Tension Test
Class		Symbol	C	Si	Mn	P	S	Tensile Strength N/mm2	Yield Point N/mm2	Elongation of Test Piece No.11&12(%)
11	A	STKM11A	0.12max	0.35max	0.60max	0.040max	0.040max	290min.	—	35min.
12	A	STKM12A	0.20max	0.35max	0.60max	0.040max	0.040max	340min.	175min.	35min.
	B	STKM12B						390min.	275min.	25min.
	C	STKM12C						470min.	355min.	20min.
13	A	STKM13A	0.25max	0.35max	0.30~0.90	0.040max	0.040max	370min.	215 min.	30min.
	B	STKM13B						440min.	30 5min.	20min.
	C	STKM13C						510min.	380min.	15min.
14	A	STKM14A	0.30max	0.35max	0.30~1.00	0.040max	0.040max	410min.	245min.	25min.
	B	STKM14B						500min.	355min.	15min.
	C	STKM14C						550min.	410min.	15min.
15	A	STKM15A	0.25~0.35	0.35max	0.30~1.00	0.040max	0.040max	470min.	275min.	22min.
15	C	STKM15C	0.25~0.35	0.35max	0.30~1.00	0.040max	0.040max	580min.	43 5min.	12min.
16	A	STKM16A	0.35~0.45	0.40max	0.40~1.00	0.040max	0.040max	510min.	32 5min.	20min.
16	C	STKM16C	0.35~0.45	0.40max	0.40~1.00	0.040max	0.040max	620min.	460min.	12min.
17	A	STKM17A	0.45~0.55	0.40max	0.40~1.00	0.040max	0.040max	550min.	345min.	20min.
17	C	STKM17C	0.45~0.55	0.40max	0.40~1.00	0.040max	0.040max	650min.	480min.	10min.
18	A	STKM18A	0.18max	0.55max	1.05max	0.040max	0.040max	440min.	275min.	25min.
	B	STKM18B						490min.	315min.	23min.
	C	STKM18C						510min.	380min.	15min.
19	A	STKM19A	0.25max	0.55max	1.50max	0.040max	0.040max	490min.	315min.	23min.
19	C	STKM19C	0.25max	0.55max	1.50max	0.040max	0.040max	550min.	41 0min.	15min.
20	A	STKM20A	0.25max	0.55max	1.60max	0.040max	0.040max	540min.	390min.	23min.

JIS G3473 Carbon Steel Tubes for Cylinder Barrels

Symbol	Chemical Composition%						Tension Test
	C	Si	Mn	P	S	NborV	Tensile Strength N/mm2	Yield Point N/mm2	Elongation of Test
	C	Si	Mn	P	S	NborV	Tensile Strength N/mm2	Yield Point N/mm2	Piece No.11	Piece No.11
STC370	0.25max	0.35max	0.30-0.90	0.040max	0.040max	—	370min	215min	30min
STC440	0.25max	0.35max	0.30-0.90	0.040max	0.040max	—	440min	305min	10min
STC510A	0.25max	0.35max	0.30-0.90	0.040max	0.040max	—	510min	380min	10min
STC510B	0.18max	0.55max	1.50max	0.040max	0.040max	—	510min	380min	15min
STC540	0.25max	0.55max	1.60max	0.040max	0.040max	0.15max	540min	390min	20min
STC590A	0.25max	0.35max	0.30~0.90	0.040max	0.040max	—	590min	490min	10min
STC590B	0.25max¥H¤U	0.35max	1.50max	0.040max	0.040max	—	590min	490min	15min

JIS G3441 Alloy Steel Tubes

Class	Symbol	Chemical Composition %
Class	Symbol	C	Si	Mn	P	S	Cr	Mo
SCM 420 TK	—	0.18~0.23	0.15-0.35	0.60~0.85	0.030max	0.030max	0.90~1.20	0.15~0.30
SCM 415 TK	—	0.13~0.18	0.15-0.35	0.60~0.85	0.030max	0.030max	0.90~1.20	0.15~0.30
SCM 418 TK	—	0.16~0.21	0.15-0.35	0.60~0.85	0.030max	0.030max	0.90~1.20	0.15~0.30
SCM 420 TK	—	0.18~0.23	0.15-0.35	0.60~0.85	0.030max	0.030max	0.90~1.20	0.15~0.30
SCM 430 TK	Akin to STKS1	0.28~0.33	0.15-0.35	0.60~0.85	0.030max	0.030max	0.90~1.20	0.15~0.30
SCM 435 TK	Akin to STKS2	0.33~0.38	0.15-0.35	0.60~0.85	0.030max	0.030max	0.90~1.20	0.15~0.30

Remarks :

1. As impurities. Ni and Cu for each grade shall no exceeded 0.25% and 0.30% respectively

2. when the product analysis is required by the purct aser, the toierabces for the values gived by the above table shell be as specified in Table 3 in JIS G 0321 .

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